Publications by author

Sofia Alexaki

G. Karvounarakis, A. Magkanaraki, S. Alexaki, V. Christophides, D. Plexousakis, M. Scholl, K. Tolle,
RQL: A Functional Query Language for RDF, at The Functional Approach to Data Management: Modelling, Analyzing and Integrating Heterogeneous Data, P.M.D.Gray, L.Kerschberg, P.J.H.King, A.Poulovassilis (eds.), 2004 LNCS Series, Springer-Verlag, pp.435-465
Available: pdf file (536 KB)

G. Karvounarakis, A. Magkanaraki, S. Alexaki, V. Christophides, D. Plexousakis, M. Scholl, K. Tolle,
Querying the Semantic Web with RQL, at Computer Networks and ISDN Systems Journal, Vol. 42(5), August 2003, pp. 617-640. Elsevier Science
Available: pdf file (491 KB)

S. Alexaki, N. Athanasis, V. Christophides, G. Karvounarakis, A. Maganaraki, D. Plexousakis & K. Tolle,
The FORTH-ICS RDFSuite: High-level Scalable Tools for the Semantic Web,
submitted for publication, 2002.
Available: pdf file (85 KB).

G. Karvounarakis, S. Alexaki, V. Christophides, D. Plexousakis, Michel Scholl,
RQL: A Declarative Query Language for RDF, The Eleventh International World Wide Web Conference (WWW'02), Honolulu, Hawaii, USA, May 7-11, 2002.
Available: pdf file (308 Kb)

A. Magkanaraki, S. Alexaki, V. Christophides, and Dimitris Plexousakis,
Benchmarking RDF Schemas for the Semantic Web, First International Semantic Web Conference (ISWC'02), Sardinia, Italy, June 9-12, 2002.
Available: pdf file (590 KB)

Anastasia Analyti

Y. Tzitzikas, A. Analyti, and N. Spyratos,
The Semantics of the Compound Term Composition Algebra,
International Conference on Ontologies, DataBases, and Applications of Semantics for Large Scale Information Systems (ODBASE 2003), LNCS 2888, November 2003, pp. 970-985
Available: pdf file (163 Kb)

Y. Tzitzikas, A. Analyti, N. Spyratos and P. Constantopoulos,
An Algebraic Approach for Specifying Compound Terms in Faceted
Taxonomies,
Proceedings of the 13th European-Japanese Conference on Information
Modelling and Knowledge Bases, EJC2003, Kitakyushu, Japan, June 2003. In book: Information Modelling and knowledge Bases XV, IOS Press, 2004, pp. 67-87
Available: pdf file (214 Kb)

Y. Tzitzikas, N. Spyratos, P. Constantopoulos and A. Analyti,
"Extended Faceted Taxonomies for Web Catalogs",
Third International Conference on Web Information Systems Engineering,
WISE 2002, Singapore, 12-14 December, 2002, pp. 192-204
Available: pdf file (141 KB)

Yannis Tzitzikas, Nicolas Spyratos, Panos Constantopoulos and Anastasia Analyti,
"Extended Faceted Ontologies", (short paper),
Fourteenth International Conference on Advanced Information Systems
Engineering, CAiSE-2002, Toronto, Canada, May 11-12, 2002.
Available: compressed ps.gz file (57 KB)

Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos,
A Theory of Context in Information Bases,
In Information Systems, 27(3), pp. 151-191, 2002
Available: pdf file (549 KB), compressed ps file (168 KB).

Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos,
Deriving and Retrieving Contextual Categorical Information through Instance Inheritance,
Fundamenta Informaticae 44 (2000), pp. 1-31, IOS Press.
Available: pdf file (434 KB), compressed ps file (164 KB).

Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos,
Contextualization as an Abstraction Mechanism for Conceptual Modelling,
Proc. of the 18th Intern. Conference on Conceptual Modelling (ER '99), Paris, November 15-18, 1999, pp. 475-489.
Available: pdf file (105 KB),compressed ps file (55 KB).

Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos,
Querying Contextualized Information Bases,
Proc. of the 24th Intern. Conference on Information and Communication Technologies and Programming (ICT&P ' 99), Plovdiv, Bulgaria, June 8-12, 1999.
Available: pdf file (175 KB), compressed ps file (77 KB).

Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos,
Contextualization as an Abstraction Mechanism for Conceptual Modelling,
Technical Report FORTH-ICS/TR-255, April 1999.
Available: compressed ps file (73 KB), pdf file (137 KB).

Anastasia Analyti, Nicolas Spyratos, Panos Constantopoulos & Martin Doerr,
Inheritance under Participation Constraints and Disjointness,
Information Modeling and Knowledge Bases X,: H. Jaakkola, H. Kangassalo, E. Kawaguchi (eds.), 1999.
Available: pdf file (265 KB), compressed ps file (79 KB).

Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nikolas Spyratos,
Context in Information Bases,
Proc. of the 3rd IFCIS International Conference on Cooperative Information Systems (CoopIS ' 98), New York, USA, August 20-22, 1998, pp. 260-270.
Available: abstract - html file (3 KB), pdf file (171 KB), compressed ps file (82 KB).

Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos,
Deriving and Retrieving Contextual Categorical Information through Instance Inheritance,
Technical Report FORTH-ICS/TR-220, May 1998.
Available: compressed ps file (129 KB)

Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nikolas Spyratos,
A Theory of Contexts in Information Bases,
Technical Report FORTH-ICS/TR-216, March 1998.
Available: pdf file (500 KB), compressed ps file (294 KB).

Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos,
On the Semantics of a Semantic Network,
Fundamenta Informaticae 36 (1998), pp. 109-144, IOS Press.
Available: pdf file (382 KB), compressed ps file (115 KB).

Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos,
Deriving Semantic Information through Property Covering and Inheritance,
Data and Knowledge Engineering, 28, No. 1, 30, pp. 3-30, 1998.
Available: pdf file (345 KB), compressed ps file (105 KB).

Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos,
Specialization by Restriction and Schema Derivations,
Information Systems, Vol. 23, No. 1, pp. 1-38, 1998.
Available: pdf file (455 KB), compressed ps file (170 KB)

Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos,
Deriving and retrieving Contextual Categorical Information through Instance Inheritance,
Fundamenta Informaticae, Vol. 33, pp. 1-37, 1998.
Available: pdf file (405 KB), compressed ps file (143 KB)

Anastasia Analyti, Nicolas Spyratos, Panos Constantopoulos & Martin Doerr,
Inheritance under Participation Constraints and Disjointness,
Proc. of the 8th European-Japanese Conference on Information Modelling and Knowledge Bases, pp. 269-287, 1998.
Available: pdf file (265 KB), compressed ps file (79 KB).

Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos,
Property Covering: A Powerfull Construct for Schema Derivations,
Proc. of the 16th. International Conference on Conceptual Modeling (ER' 97), pp. 271-284, November 1997.
Available: pdf file (201 KB), compressed ps file (55 KB)

Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos,
Property Covering: A Powerful Construct for Schema Derivations,
Technical Report FORTH-ICS/TR-199, 28 pages, June 1997.
Available: compressed ps file (91 KB).

Anastasia Analyti, Nicolas Spyratos, Panos Constantopoulos & Martin Doerr,
Inheritance under Participation Constraints and Disjointness,
Technical Report FORTH-ICS/TR-198, 28 pages, June 1997.
Available: compressed ps file (81 KB).

Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos,
On the Definition of Semantic Network Semantics,
Technical Report FORTH-ICS/TR-187, 45 pages, February 1997.
Available: pdf file (383 KB), compressed ps file (117 KB).

Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos,
Specialization by Restriction and Schema Derivations.
Technical Report FORTH-ICS/TR-176, 56 pages, October 1996.
Available: compressed ps file (133.2 KB).

Grigoris Antoniou

Giorgos Flouris, Dimitris Plexousakis, Grigoris Antoniou
AGM Postulates in Arbitrary Logics: Initial Results and Applications.
Technical Report FORTH-ICS/TR-336, April 2004.
Available: pdf file (994 Kb).

Giorgos Flouris, Dimitris Plexousakis, Grigoris Antoniou
Generalizing the AGM Postulates: Preliminary Results and Applications
To appear in Belief Change 04 Subworkshop of International Workshop on Non-Monotonic Reasoning 2004 (NMR-04), June 6-8, 2004, Westin Whistler Resort and Spa, Whistler BC, Canada.
Available: pdf file (374 KB).

Flouris G., Plexousakis D., Antoniou G.,
On a Unifying Framework for Comparing Knowledge Representation Schemes, in Proceedings of the 10th International Workshop Knowledge Representation meets Databases (KRDB2003) Hamburg, Germany, Sept.15-16, (2003)
Available: pdf file (134 KB)

George Flouris, Dimitris Plexousakis & Grigoris Antoniou
Describing Knowledge Representation Schemes: a Formal Account,
Technical Report FORTH-ICS/TR-320, April 2003.
Available: pdf file (1.6 MB).

G. Antoniou,
Embedding Defeasible Logic into Logic Programming. In Proc. 9th Panhellenic Conference in Inofrmatics (PCI’2003), pp. 80-89, LNCS, Springer 2003
Available: pdf file (190 KB)

Chryssoula Bekiari

Martin Doerr, Dimitris Plexousakis & Chryssoula Bekiari,
A Metamodel for Part-Whole Relationships for Reasoning on Missing Parts and Reconstruction,
Proc. of ER-2001, Yokohama, Japan, 2001.
Available: Available: pdf file (368 KB), compressed ps file (1,3 MB).

Panos Constantopoulos, Eythmis Fritzalas, Chryssoula Bekiari , Dimitris Agelakis & Daphne Chronaki,
MAISTOR: a Structural Documentation System for Buildings,
Proc. of the CAA 2000 (28th annual conference), Ljubljana, Slovenia, April 18 - 21, 2000.
Available: pdf file (743 KB).

Panos Constantopoulos, Chryssoula Bekiari & Eythymis Fritzalas,
MAISTOR: Structural Documentation System,
1st Panhellenic Conference "Geographic Information Systems - Potentialities & Applications, Perspectives & Challenges", Athens, Divani Caravel Hotel, December 1999.
Available: pdf file (1.5 MB).

Chryssoula Bekiari & Martin Doerr,
Documentation and Reasoning on Parts and Potential Wholes,
Technical Report FORTH-ICS/TR-260, October 1999.
Available: compressed ps file (899 KB), pdf file (636 KB).

Chryssoula Bekiari & Martin Doerr,
Documentation and Reasoning on Parts and Potential Wholes,
Computer Applications in Archaeology, Conference 1999, Dublin Ireland, April 14-18, 1999.
Available: compressed ps file (898 KB), pdf file (636 KB).

Chryssoula Bekiari, Christina Gritzapi & Dimitrios Kalomoirakis,
POLEMON: A Federated Database Management System for the Documentation, Management and Promotion of Cultural Heritage,
Proc. of the 26th Conference on Computer Applications in Archaeology, Barchelona, March 24-28, 1998.
Available: compressed ps file (367 KB)

Chryssoula Bekiari, Theodosia Bitzou, Dimitris Calomirakis, Alexandra Caretsou, Dafni Chronaki, Panos Constantopoulos, Christina Gritzapi & Maria Lagogianni,
DELTOS : conservation documentation and administration of site monuments and preserved buildings,
Proc. of the III Convegno Internazionale di Archeologia e Informatica, Roma, November 22-25, 1995.
Available: compressed ps file (1 MB)

Pantos Pantos & Chryssoula Bekiari,
POLEMON: A Project to Computerize the Monument Records at the Greek Ministry of Culture,
Proc. of the Conference on Archaelogical Heritage: Inventory and Documentations Standards in Europe, Oxford, September 1995.
Available: pdf file(22 KB), compressed ps file (19 KB)

Dimitrios Calomirakis, Panos Constantopoulos, Maria Lagogianni, Chryssoula Bekiari, Theodosia Bitzou & Daphni Chronaki,
DELTOS : Registration / Documentation of site monuments groups of monuments and preserved buildings,
Conference on "Monuments Plotting: Methods and Requirements", National University of Athens, organized by Technical Chamber of Greece, Athens, November 30, 1993.
Available in Greek: compressed ps file (717 KB).

Chryssoula Bekiari, Panos Constantopoulos & Theodosia Bitzou,
DELTOS : A Documentation System for the Antiquities and Preserved Buildings of Crete, Requirements Analysis,
Technical Report FORTH-ICS/TR-60, October 1992.
Available in Greek: compressed ps file (177 KB).

Maria Moutsaki & Chryssoula Bekiari,
Detailed Production Planning and Control for Process Industries,
3rd Panhellenic Conference on Computer Science, Athens, Greece, May 1991.
Available in Greek: compressed ps file (55.2 KB)

Theodosia Bitzou

Vassilis Christophides

A. Magkanaraki, V. Tannen, V. Christophides and D. Plexousakis,
Viewing the Semantic Web Through RVL Lenses, Proc of the Second International Semantic Web Conference (ISWC'03), (LNCS 2870), pp.96-112, Sanibel Island, Florida, USA, 20-23 October, 2003.
Available: pdf file (399 KB)

V. Christophides, D. Plexousakis, M. Scholl, S. Tourtounis,
On Labeling Schemes for the Semantic Web, Proc. of the 12th International World Wide Web Conference (WWW'03) pp. 544-555, Budapest, Hungary, May 20-24, 2003.
Available: pdf file (265 KB)

N. Spyratos, Y. Tzitzikas, V. Christophides,
On Personalizing the Catalogs of Web Portals, Special Track on Semantic Web at the 15th International FLAIRS'02 Conference, Florida, May 14-16, 2002.
Available: pdf file (78 KB)

G. Karvounarakis, V. Christophides & D. Plexousakis,
RQL: A Declarative Query Language for RDF,
D-Lib Magazine, Vol. 7, no. 12, December 2001.
Available: pdf file (27 KB), compressed ps file (49 KB).

V. Christophides, R. Hull, G. Karvounarakis, A. Kumar, G.Tong & M. Xong,
Beyond Discrete E-Services: Composing Session-Oriented Services in Telecommunications ,
Proc. of the Second International Workshop on Technologies for e-Services (TES 2001) in conjuction with VLDB 2001 Conference, Rome, Italy September 14-15, pages 58-73, 2001.
Available: pdf file (233 KB).

V. Christophides, R. Hull & A. Kumar,
Querying and Splicing of XML Workflows,
Proc. of the Sixth International Conference on Cooperative Information Systems (CoopIS 2001), Trento, Italy September 5-7, 2001.
Available: pdf file (250 KB).

P. Constantopoulos, V. Christophides & D. Plexousakis,
Semantic Web Workshop: Models, Architecture and Management
Intelligence Magazine, 12(2), 2001 and SIGMOD Record, 30(3), 2001.
Available: pdf file (89 KB), compressed ps file (155 KB).

Sofia Alexaki, Vassilis Christophides, Greg Karvounarakis, Dimitris Plexousakis & Karsten Tolle,
On Storing Voluminous RDF Description: The case of Web Portal Catalogs,
Proc. of the 4th International Workshop on the Web and Databases (WebDB2001) in conjuction with ACM SIGMOD'01 Conference, Santa Barbara California USA, May 24-25, 2001.
Available: pdf file (245 KB), compressed ps file (100 KB).

Vassilis Christophides, Richard Hull, Akhil Kumar & Jerome Simeon,
Workflow Mediation using VorteXML,
Bulletin of the Technical Committee on Data Engineering , Volume 24 (1), pp. 40-45, March 2001.
Available: pdf file (39 KB).

Sofia Alexaki, Vassilis Christophides, Greg Karvounarakis, Dimitris Plexousakis & Karsten Tolle,
The FORTH-ICS RDFSuite: Managing Voluminous RDF Description Bases,
Proc. of the 2nd International Workshop on the Semantic Web (SemWeb'01) in conjuction with Tenth International World Wide Web Conference (WWW10), pp. 1-13, Hong-Kong, May 1st, 2001.
Available: pdf file (547 KB), compressed ps file (234 KB).

G. Karvounarakis, V. Christophides, D. Plexousakis, S. Alexaki,
Querying RDF Descriptions for Community Web Portals, 17ièmes Journees Bases de Donnees Avancees (BDA'01), pp. 133-144, Agadir, Maroc, 29 Octobre - 2 Novembre, 2001.
Available: pdf file (146 Kb)

Vassilis Christophides, Dimitris Plexousakis, Gregory Karvounarakis & Sofia Alexaki,
Declarative Languages for Querying Portal Catalogs,
Proc. of the 1st "DELOS" Workshop on "Information Seeking, Searching and Querying in Digital Libraries", Zurich, Switzerland, December 11-12, 2000.
Available: pdf file (171 KB).

S. Alexaki, V. Christophides, G. Karvounarakis, D. Plexousakis, K. Tolle, B. Amann, I. Fundulaki, M. Scholl & A-M. Vercoustre,
Managing RDF Metadata for Community Webs,
Proc. of the 2nd International Workshop on The World Wide Web and Conceptual Modelling (WCM'2000) - ER Workshops, Salt Lake City, Utah US, October 2000, pp. 140-151.
Available: pdf file (235 KB), compressed ps file (87 KB).

Karsten Tolle & Vassilis Christophides,
ICS-VRP: a Tool for Parsing and Validating RDF Metadata & Schemas,
ERCIM News No.41, April 2000 (online edition).
Available: html file (10 KB).

Greg Karvounarakis, Vassilis Christophides & Dimitris Plexousakis,
Querying Semistructured (Meta) Data and Schemas on the Web: The case of RDF & RDFS,
Technical Report FORTH-ICS/TR-269, February 2000.
Available: pdf file (397 KB), compressed ps file (155 KB).

Vassilis Christophides, Sophie Cluet & Jérôme Siméon,
On Wrapping Query Languages and Efficient XML Integration,
In Proc. of the 2000 ACM SIGMOD Conference on Management of Data, pp. 141-152, Dallas, Texas, ACM Press,May 2000.
Available: pdf file (410 KB).

Yannis Velegrakis, Vassilis Christophides & Panos Constantopoulos,
On Z39.50 wrapping and description logics,
International Journal on Digital Libraries, Volume 3 Issue 3 (2000), pp. 208-220.
Available: pdf file (287 KB).

Yiannis Velegrakis, Vassilis Christophides & Panos Constantopoulos,
Declarative Specification of Z39.50 Wrappers using Description Logics,
Proc. of the ECDL' 99, pp. 381-402, Paris, France, September 1999.
Available: compressed ps file (93 KB), html file (80 KB), pdf file (380 KB).

Vassilis Christophides, Katerina Houstis, Spyros Lalis & Harikleia Tsalapata,
Ontology-driven Integration of Scientific Repositories,
Proc. of the 4th Workshop on Next Generation Information Technologies and Systems (NGITS ' 99), R. Y. Pinter and S. Tsur Editors, pp. 190-202, Zikhron-Yaakov, Israel, July 1999.
Available: pdf file (182 KB), word file (114 KB).

Vassilis Christophides, S. Cluet & J. Simeon,
Optimization Techniques for Semistructured Integration Systems,
Proc. of the Workshop on Foundations for Information Integration, S. Abiteboul & D. Florescu & A. Levy & G. Moerkotte editors, Dagstuhl Germany, June 1999.
Available: pdf file (124 KB).

Katerina Houstis, Christos Nikolaou, Spyros Lalis, Sarantos Kapidakis, Vassilis Christophides, Eric Simon & Anthony Thomasic,
Towards a next generation of open scientific data repositories and services,
In Special issue on Digital Libraries, CWI Quarterly (Centrum voor Wiskunde en Informatica), Amsterdam Netherlands, Vol. 12, No. 2, June 1999, pp. 111-132.
Available: pdf file(224 KB), rtf file (312 KB).

B.Birmingham, K. Bohm, V. Christophides, S. Cluet, A. Grespo, D. Kiskis, B. Leiner, C.Meghini, F. Rabitti, U. Roehm, H.J. Schek, H. Schuldt & P. Weinstein,
Interoperability between Digital Libraries ,
EU-NSF Digital Library Working Group on Interoperability between Digital Libraries, January 1999.
Available: htm file (65 KB).

Bernd Amann, Vassilis Christophides, Irini Fundulaki, Michel Scholl & Anne-Marie Vercoustre,
Intelligent Mediation of Cultural Information Sources,
ERCIM News No.35, October 1998 (online edition).
Available: html file (11 KB).

A. Michard, Vassilis Christophides, M. Scholl, M. Stapleton, D. Sutcliffe & A-M. Vercoustre,
The Aquarelle Ressource Discovery System,
Computer Networks and ISDN Systems, Vol. 30, No. 13, Elsevier Science, August 1998.
Available: abstract - html file (3 KB), paper - html file (70 KB), paper - compressed ps file (273 KB).

C. Housti, Ch. Nikolaou, S. Lalis, S. Kapidakis & V. Christophides,
Open Scientific Data Repositories Architecture,
in: NSF Invitational Workshop on Distributed Information, Computation and Process Management for Scientific and Engineering Enviroments (DICPM), Hyatt Dulles, Herndon, Virginia, May 15-16, 1998.
Available: html file(9 KB).

Katerina Houstis, Christos Nikolaou, Spyros Lalis, Sarantos Kapidakis & Vassilis Christophides,
Towards a next generation of open scientific data repositories and services,
Technical Report FORTH-ICS/TR-219, May 1998.
Available: compressed ps file(124 KB).

Vassilis Christophides, Martin Doerr & Irini Fundulaki,
The Aquarelle Folder Server,
ERCIM NEWS No.33 "Special: Information Technology for Education and Training", April 1998.
Available: compressed ps file (27.9 KB)

Vassilis Christophides, Michel Scholl & Anne-Marie Vercoustre,
Querying Heterogeneous Semi-Structured Data,
ERCIM NEWS No.33, April 1998 (online edition).
Available: html file (12 KB)

Vassilis Christophides, Sophie Cluet, Guido Moerkotte & Jérôme Siméon,
Optimizing Generalized Path Expressions Using Full Text Indexes,
Networking and Information Systems Journal, Volume 1, No 2-3, pp. 177-194, 1998.
Available: pdf file (324 KB).

Vassilis Christophides, Martin Doerr & Irini Fundulaki,
A Semantic Network Approach to Semi-Structured Documents Repositories,
Proc. of the ERCIM Digital Libraries ' 97 Conference (ERDL'97), pp. 305-324, Pisa, Italy, November 1997.
Available: pdf file (255 KB), compressed ps file (100 KB).

S. Abiteboul, S. Cluet, V. Christophide, M. Tova, G. Moerkotte & J. Simon,
Querying Documents in Object Databases,
International Journal on Digital Libraries, Volume 1, No. 1, pp. 5-19, April 1997.
Available: pdf file (271 KB).

Vassilis Christophides, Sophie Cluet & Guido Moerkotte,
Evaluating queries with generalized path expressions,
Proc. of the 1996 ACM SIGMOD International Conference on Management of Data, Montreal, Quebec, Canada, pp. 413-422, June 4-6, 1996.
Available: pdf file (224 KB).

Vassilis Christophides & A. Rizk,
Querying structured documents with hypertext links using OODBMS,
Proc. of the ECHT ' 94 European Conference on Hypermedia Technologies, pp. 186-197, Edinburgh, U.K., September 1994.
Available: pdf file (257 KB).

Vassilis Christophides, Serge Abiteboul, Sophie Cluet & Michel Scholl,
From Structured Documents to Novel Query Facilities,
Proc. of the 1994 ACM SIGMOD International Conference on Management of Data, Minneapolis, Minnesota, May 24-27, 1994, pp. 313-324.

Bernd Amann, Vassilis Christophides & Michel Scholl,
HyperPATH/O2: Integrating Hypermedia Systems with Object-Oriented Database Systems,
Proc. of the 4th International Conference on Database and Expert Systems Applications (DEXA'93), Prague, Czech Republic, September 6-8, 1993, pp. 709-720.

Panos Constantopoulos

Y. Tzitzikas, N. Spyratos and P. Constantopoulos,
"Deriving Valid Expressions from Ontology Definitions",
Proceedings of the 11th European-Japanese Conference on Information Modelling and Knowledge Bases, Maribor, Slovenia, 29 May-1 June, 2001.
In Information Modelling and Knowledge Bases XIII, Kangassalo H., Welzer T., Jaakkola H., Rozman I., Kawaguchi E. (editors), IOS Press, Amsterdam, 2002.
Available: Compressed ps.gz file (238 KB)

Yannis Tzitzikas, Nicolas Spyratos and Panos Constantopoulos,
"Query Evaluation for Mediators over Web Catalogs",
Proceedings of 27th International Conference on Information and Communication Technologies and
Programming, ICT&P 2002, Primorsko, Bulgaria, June 24-29, 2002. Aslo published in International Journal of Information Theories and Applications, 9(2), 2002.
Available: compressed ps.gz file (73 KB)

Yannis Tzitzikas, Nicolas Spyratos and Panos Constantopoulos,
"Query Translation for Mediators over Ontology-based Information Sources",
Second Hellenic Conference on Artificial Intelligence, SENT-2002,
Thessaloniki, Greece, April 11-12, 2002.
Available: compressed ps.gz file (104 KB)

Panos Constantopoulos, Martin Doerr, Maria Theodoridou, Manolis Tzobanakis
"Historical documents as monuments and as sources", Computer Applications and Quantitative Methods in Archaeology Conference, CAA2002, 2-6 April, 2002, Heraklion, Greece.
Available: pdf file (307 KB).

Yannis Tzitzikas, Nicolas Spyratos and Panos Constantopoulos,
Mediators over Ontology-based Information Sources,
Second International Conference on Web Information Systems Engineering, WISE 2001, Kyoto, Japan, Dec 3-6, 2001.
Available: pdf file (161 KB), compressed ps file (78 KB).

Yannis Tzitzikas, Nicolas Spyratos & Panos Constantopoulos,
Deriving Valid Expressions from Ontology Definitions,
Proc. of the 11th European-Japanese Conference on Information Modelling and Knowledge Bases, Maribor, Slovenia, May 29 - June 1, 2001.
Available: pdf file (255 KB), compressed ps file (238 KB)

Yannis Tzitzikas & Panos Constantopoulos,
A Decision-theoretic Model for Information Retrieval Supporting Time Constraints,
Proc. of the BCS-IRSG European Colloquium on IR Research, Darmstadt, Germany, April 4-6, 2001.
Available: pdf file (122 KB),compressed ps file (116 KB)

Panos Constantopoulos, Chryssoula Bekiari & Eythymis Fritzalas,
MAISTOR: Structural Documentation System,
1st Panhellenic Conference "Geographic Information Systems - Potentialities & Applications, Perspectives & Challenges", Athens, Divani Caraver Hotel, December 1999.
Available: pdf file (1.5 MB).

Marios Sintichakis & Panos Constantopoulos,
A Method for Monolingual Thesauri Merging,
Proc. of the 20th International ACM SIGIR Conference on Research and Development in Information Retrieval, Philadelphia, PA, USA, July 1997.
Available: pdf file (246 KB), compressed ps file (65 KB).

Manos Theodorakis & Panos Constantopoulos,
On Context-based Naming in Information Bases,
Proc. of the 2nd IFCIS International Conference on Cooperative Information Systems (CoopIS ' 97), Charleston, South Carolina, USA, June 24-27, 1997, pp. 140-149.
Available: abstract - html file (3 KB), html file (67 KB), compressed ps file (60.3 KB).

Manos Theodorakis & Panos Constantopoulos,
Context-Based Naming in Information Bases,
International Journal of Cooperative Information Systems, Vol. 6, Nos. 3 & 4 (1997), pp. 269-292.
Available: abstract - html file (3 KB), html file (75 KB), pdf file (284 KB), compressed ps file (87 KB).

Panos Constantopoulos & Maria Christoforaki,
Dictionary of terms of CLIO cultural documentation system,
Technical Report FORTH-ICS/TR-175, 17 pages, October 1996.
Available in Greek: compressed ps file (242 KB).

George Spanoudakis & Panos Constantopoulos,
An Evidential Model for Estimating the Salience of Attributes in Classification Schemes,
Computer Science Technical Report No. 1996/05, City University London, July 1996.
Available: pdf file (191 KB), compressed ps file (984 KB).

Panos Constantopoulos & Yannis Tzitzikas,
Context-Driven Information Base Update,
Proc. of the 8th International Conference, CAiSE'96, pp. 319-344, Heraklion, Crete, Greece, May 20-24, 1996.
Available: pdf file (233 KB), compressed ps file (243 KB).

Panos Constantopoulos, Manos Theodorakis & Yannis Tzitzikas,
Developing Hypermedia Over an Information Repository,
Proc. of the 2nd WorkShop on Open Hypermedia Systems (OHS) on Hypertext' 96 (HT ' 96), Washington, DC, USA, March 16-17, 1996.
Available: pdf file (63 KB), compressed ps file (144 KB).

George Spanoudakis & Panos Constantopoulos,
Analogical Reuse of Requirements Specifications: A Computational Model,
Applied Artificial Intelligence: An International Journal, Vol. 10, No. 4, pp. 281-306, 1996.
Available: pdf file (310 KB), compressed ps file (101 KB).

George Spanoudakis & Panos Constantopoulos,
Elaborating Analogies from Conceptual Models,
International Journal of Intelligent Systems, (eds) Yager R., J.Wiley and Sons, Vol. 11, No 11, pp. 917-974, 1996.
Available: pdf file (222 KB), compressed ps file (168 KB).

George Spanoudakis & Panos Constantopoulos,
Integrating Specifications: A Similarity Reasoning Approach,
Automated Software Engineering Journal, Vol. 2, No. 4, pp. 311-342, December 1995.
Available: pdf file (339 KB), compressed ps file (158 KB).

Maria Christoforaki, Panos Constantopoulos & Martin Doerr,
Modelling occurences in cultural documentation,
Proc. of the III Convegno Internazionale di Archeologia e Informatica, Roma, November 22-25, 1995.
Available: abstract - compressed ps file (8.18 KB), paper - compressed ps file (61.6 KB).

Panos Constantopoulos & Martin Doerr,
An Approach to Indexing Annotated Images,
Proc. of the International Conference on Hypermedia and Interactivity in Museums - ICHIM '95, San Diego, CA., USA, October 1995.
Available: pdf file (361 KB), compressed ps file (1.45 MB)

N.A.M. Maiden, P. Assenova, P. Constantopoulos & M. Jarke,
Computational Mechanisms for Distributed Requirements Engineering,
Proc. of the 7th International Conference Software Engineering and Knowledge Engineering - SEKE '95, Maryland, USA, June 1995.
Available: compressed ps file (44.7 KB)

P. Constantopoulos, M. Jarke, J. Mylopoulos & Y. Vassiliou,
The Software Information Base: A Server for Reuse,
in: VLDB Journal, Vol. 4, No. 1, pp. 1-43, January 1995.
Available: pdf file (453 KB), compressed ps file (218 KB).

Panos Constantopoulos & Martin Doerr,
Component Classification in the Software Information Base,
in: O. Nierstrasz and D. Tsichritzis, eds., Object-Oriented Software Composition, Prentice-Hall, 1995.
Available: compressed ps file (75.9 KB)

George Spanoudakis, Panos Constantopoulos & Miranta Kiprioti,
Similarity Analysis for Process Modelling of Requirements Engineering,
Dagstuhl Seminar on System Requirements: Analysis, Management and Exploitation, Dagstuhl, Germany, October 1994.
Available: compressed ps file (148.2 KB)

George Spanoudakis & Panos Constantopoulos,
Integrating Specifications,
Dagstuhl Seminar on System Requirements: Analysis, Management and Exploitation, Dagstuhl, Germany, October 1994.
Available: compressed ps file (56.8 KB)

George Spanoudakis & Panos Constantopoulos,
On Evidential Feature Salience,
Proc. of the 5th International Conference on Database and Expert Systems Applications - DEXA '94, Athens, Greece, September 1994.
Available: pdf file (43 KB), compressed ps file (36 KB)

Panos Constantopoulos, Thalis Georgiou & Nikos Tsatsakis,
One-machine scheduling with setup times: fast solutions and applications,
Proc. of the IFIP Conference on Advanced Production Management Systems, Athens, Greece, September 1994.
Available: compressed ps file (21.79 KB)

Panos Constantopoulos & George Spanoudakis,
Similarity for Analogical Software Reuse: A Computational Model,
Proc. of the 11th European Conference on Artificial Intelligence - ECAI '94, pp. 18-22, Amsterdam, The Netherlands, August 1994.
Available: pdf file (44 KB), compressed ps file (36 KB).

George Spanoudakis & Panos Constantopoulos,
Measuring Similarity Between Software Artifacts,
Proc. of the 6th International Conference on Software Engineering and Knowledge Engineering - SEKE '94, Jurmala, Latvia, June 1994.
Available: pdf file (113 KB), compressed ps file (70 KB).

Panos Constantopoulos:
Cultural Documentation: The CLIO System.
Technical Report FORTH-ICS/TR-115, 12 pages, January 1994.
Available in English: compressed ps file (379 KB).
Available in Greek: compressed ps file (373.95 KB).

M. Jarke, K. Pohl, S. Jacobs, H. Nissen, J. Bubenko, P. Assenova, P. Holm, B. Wangler, C. Rolland, V. Plihon, J.-R. Schmitt, A. Sutcliffe, S. Jones, N. Maiden, D. Till, Y. Vassiliou, P. Constantopoulos & G. Spanoudakis,
Requirements Engineering: An Integrated View of Representation, Process & Domain,
Proc. of the 4th European Conference on Software Engineering, Garmisch-Partenkirchen, Germany, September 1993.
Available: compressed ps file (74.9 KB)

Panos Constantopoulos, Martin Doerr & Yiannis Vassiliou,
Repositories for Software Reuse: The Software Information Base,
Proc. of the IFIP WG 8.1 Conference on Information System Development Process, Como, Italy, September 1993.
Available: pdf file (341 KB), compressed ps file (153 KB).

George Spanoudakis & Panos Constantopoulos,
Similarity for Analogical Software Reuse: A Conceptual Modelling Approach,
Proc. of the 5th International Conference on Advanced Information Systems Engineering - CAiSE '93, Paris, France, June 1993.
Available: pdf file (60 KB), compressed ps file (45 KB).

Panos Constantopoulos & Elena Pataki,
A Browser for Software Reuse,
Proc. of the 4th International Conference on Advanced Information Systems Engineering - CAiSE '92, Manchester, U.K., May 1992.
Available: pdf file (331 KB), compressed ps file (147 KB).

Maria Moutsaki & Panos Constantopoulos,
HEPHESTUS : Production Planning and Control System for Raw Material Industries, User Manual.
Technical Report FORTH-ICS/TR-45, January 1992.
Available in Greek: compressed ps file (246 KB).

Panos Constantopoulos, J.Drakopoulos & Y.Yeorgaroudakis,
Retrieval of Multimedia Documents by Pictorial Content: A Prototype System,
Proc. of the International Conference on Multimedia Information Systems, ACM SIGIR, Singapore, January 1991.

Panos Constantopoulos, F.C. Schweppe & R.C. Larson,
ESTIA: A Real-Time Consumer Control Scheme for Space Conditioning Usage under Spot Electricity Pricing,
Computers and Operations Research, Vol. 18, No. 8, 1991, pp. 751-765.

Panos Constantopoulos, E.Lutz, P.Savino & Y.Yeorgaroudakis,
Multimedia Document Storage, Classification and Retrieval: Integrating the MULTOS System,
Proc. of the ESPRIT Conference '89, Brussels, November 1989.

Panos Constantopoulos, V.I.Leopoulos & I.P.Tatsiopoulos,
Production planning and control as the key to integration in small industrial firms: An implementation approach and a case study,
Proc. of the 5th CIM Europe Conference, Athens, Greece, May 1989.

Panos Constantopoulos:
Decision Support for Massive Personnel Assignment.
Decision Support Systems, Vol. 5, 1989, pp. 355-363.

Panos Constantopoulos, Y. Yeorgaroudakis, A. Matteucci & G. Pancaccini,
Client Design for the MULTOS Multimedia Filing System,
Proc. of the ESPRIT Conference '88, Brussels 1988.

Panos Constantopoulos, Maria Theodoridou & Y. Yeorgaroudakis,
Flexible Query Formulation for Multimedia Document Retrieval,
Proc. of the Conference on Information Technology for Organisational Systems, Athens, Greece, 1988.

Panos Constantopoulos, G.Drettakis, E.Petra, Maria Theodoridou & Y.Yeorgaroudakis,
Iterative Design of User Interfaces for an Office System Using a UIMS,
Proc. of the Conference on Information Technology for Organisational Systems, Athens, Greece, 1988.

Panos Constantopoulos, G.Drettakis, E.Petra, Maria Theodoridou & Y. Yeorgaroudakis,
Multimedia Office System Interface Design Using a UIMS,
Proc. of the IFIP WG 8.4 Working Conference "Office Information Systems: The Design Process", Linz, Austria, 1988.

Panos Constantopoulos, et al.,
MUSE : A Multimedia System,
IEEE Office Knowledge Engineering, Vol.1, No.1, February 1987.

Panos Constantopoulos, et al.,
Office Document Retrieval in MULTOS,
Proc. of the ESPRIT Conference '86, Brussels, Belgium, November 1986.

Martin Doerr

Martin Doerr
The CIDOC CRM – An Ontological Approach to Semantic Interoperability of Metadata, AI Magazine, Volume 24, Number 3 (2003).
Available: pdf file (548 kb)

M. Doerr, J. Hunter, C. Lagoze
Towards a Core Ontology for Information Integration, in Journal of Digital information, volume 4 issue 1, April 2003
Available: pdf file (109 Kb) and
http://jodi.ecs.soton.ac.uk/Articles/v04/i01/Doerr/

Nick Crofts, Martin Doerr and Tony Gill
The CIDOC Conceptual Reference Model A Standard for Communicating Cultural Contents, in Cultivate Interactive, Issue 9, February 2003
Available html file (66 kb)

Nick Crofts, Ifigenia Dionissiadou, Martin Doerr & Matthew Stiff,
Definition of the CIDOC object-oriented Conceptual Reference Model, Version 3.2,
ISO Working Document ISO/TC46/SC4/WG9/2, July 2001.
Available: pdf file (558 KB), compressed ps file (1.2 MB).

Maria Theodoridou & Martin Doerr,
Mapping of the Encoded Archival Description DTD Element Set to the CIDOC CRM,
Technical Report FORTH-ICS/TR-289, June 2001.
Available: pdf file (226 KB).

Martin Doerr:
Mapping of the AMICO data dictionary to the CIDOC CRM.
Technical Report FORTH-ICS/TR-288, June 2001.
Available: pdf file (142 KB).

Martin Doerr:
Semantic Problems of Thesaurus Mapping.
Journal of Digital Information: Special issue on Networked Knowledge Organization Systems, Volume 1, issue 8, April 2001.
Available: JoDI web journal.

Martin Doerr:
Mapping of the Dublin Core Metadata Element Set to the CIDOC CRM.
Technical Report FORTH-ICS/TR-274, July 2000.
Available: compressed ps file (309 KB), rtf file (103 KB).

Martin Doerr & Demetrios Kalomoirakis,
A Metastructure for Archeological Terminology ,
Proc. of the CAA 2000 (28th annual conference), Ljubljana, Slovenia, April 18 - 21, 2000.
Available: pdf file (527 KB).

Martin Doerr & Nicholas Crofts,
Electronic Esperanto: The Role of the Object Oriented CIDOC Reference Model,
Proc. of the ICHIM '99, Washington DC, September 22-26, 1999.
Available: doc file(153 KB).

Martin Doerr & Nicholas Crofts,
Introduction on the CIDOC Conceptual Reference Model,
Workshop held on ICHIM' 99, Washington, September 1999.
Available: html file.

Martin Doerr & Anthi Yiortsou,
Implementing a Temporal Datatype,
Technical Report FORTH-ICS/TR-236, 16 pages, November 1998.
Available: compressed ps file (49 KB).

Martin Doerr & Nick Crofts,
Electronic Communication on Diverse Data - The Role of an Object-Oriented CIDOC Reference Model,
CIDOC'98 Conference, Melbourne, 10-14 October 1998.
Available: compressed ps file (137 KB)

Martin Doerr & Irini Fundulaki,
SIS - TMS: A Thesaurus Management System for Distributed Digital Collections,
Proc. of the 2nd European Conference, ECDL'98, Heraklion, Crete, Greece, September 1998, pp. 215-234.
Available: compressed ps file (259 KB)

Maria Theodoridou & Martin Doerr,
Classifying Historical Documents,
Proc. of the Intern. Conference on Applications of Information Technologies to Biblical Studies, OSI-HESP SUMMER SCHOOL, Sofia, Bulgaria, July 27 - August 7, 1998.
Available: html file (11 KB), compressed ps file (72 KB).

Martin Doerr:
Effective Terminology Support for Distributed Digital Collections,
in: SIXTH DELOS WORKSHOP, Preservation of Digital Information, Tomar, Portugal June 17-19, 1998.
ISBN 2-912335-06.
Available: compressed ps file (79.9 KB)

Martin Doerr & Irini Fundulaki,
The Aquarelle Terminology Service,
ERCIM NEWS No.33 "Special:Information Technology for Education and Training", April 1998.
Available: compressed ps file (23.6 KB)

Martin Doerr:
Multilingual Terminology Management for Distributed Digital Collections.
Workshop on "Electronic Lexicography", Athens, Greece, March 14, 1998.

Martin Doerr & Irini Fundulaki,
A proposal on extended interthesaurus links semantics,
Technical Report FORTH-ICS/TR-215, 9 pages, March 1998.
Available: compressed ps file (43 KB).

K. Chandrinos, J. Immerkaer, M. Doerr & P. Trahanias,
A Visual Tagging Technique for Annotating Large-Volume Multimedia Databases - A tool for adding semantic value to improve information rating,
5th DELOS Workshop "Filtering and Collaborative Filtering", European Research Consortium for Informatics and Mathematics (ERCIM), Budapest, November 10-12, 1997.

Martin Doerr:
Reference Information Acquisition and Coordination,
in: ASIS'97-Digital Collections: Implications for Users, Funders, Developers and Maintainers, Proc. of the 60th Annual Meeting of the American Society for Information Sciences, Washington, DC, USA, pp. 295-312, November 1997.
Available: compressed ps file (201.43 KB)

Martin Doerr:
Authority Services in Global Information Spaces: A requirements analysis and feasibility study.
Technical Report FORTH-ICS/TR-163, 19 pages, February 1996.
Available: compressed ps file (47 KB).

Ifigenia Dionysiadou & Martin Doerr,
Mapping of material culture to a semantic network,
Proc. of the 1994 JOINT ANNUAL MEETING, International Council of Museums Documentation Committee and Computer Network, Wasington USA, August 1994.
Available: compressed ps file (23.5 KB)

Giorgos Flouris

Flouris G., Plexousakis D., Antoniou G., "On a Unifying Framework for Comparing Knowledge Representation Schemes", in Proceedings of the 10th International Workshop Knowledge Representation meets Databases (KRDB2003) Hamburg, Germany, Sept.15-16, (2003)
Available: pdf (134 KB)

George Flouris, Dimitris Plexousakis
On the Use of Matrices for Belief Revision,
IIn LNCS 2563, "Advances in Informatics 8th Panhellenic Conference in Informatics".
Yannis Manolopoulos, Skevos Evripidou, Antonis Kakas (eds). Nicosia, Cyprus,
November 8-10, 2001. Revised Selected Papers
http://link.springer.de/link/service/series/0558/tocs/t2563.htm
Available: pdf file (213 Kb)

George Flouris, Dimitris Plexousakis & Grigoris Antoniou
Describing Knowledge Representation Schemes: a Formal Account,
Technical Report FORTH-ICS/TR-320, April 2003.
Available: pdf file (1.6 MB).

George Flouris & Dimitris Plexousakis,
Belief Revision in Propositional Knowledge Bases,
8th Panhellenic Conference on Informatics, Nicosia, Cyprus, 8-10 November 2001.
Available: pdf file (324 KB).

George Flouris:
Belief Revision in Knowledge Bases
Technical Report FORTH-ICS/TR-292, October 2001.
Available in Greek: pdf file (3 MB).

George Flouris & Dimitris Plexousakis,
Belief Revision using Table Transformation,
Technical Report FORTH-ICS/TR-290, July 2001.
Available: pdf file (1.2 MB).

Grigoris Karvounarakis

Aimilia Maganaraki

Nikos Papadakis

Papadakis N., Plexousakis D.,
Addressing the Ramification Problem in a Temporal Context: the Case of Concurrent Actions, in Proceedings of the 15th IEEE International Conference on Tools with Artificial Intelligence ICTAI03, Sacramento, California, Nov. 3-5 (2003)
Available: ps file (151 KB)

Papadakis N., Plexousakis D.,
Actions with Duration and Constraints: the Ramification Problem in Temporal Databases, International Journal on Artificial Intelligence Tools, 12 (3): 315-353, Special Issue on Selected Papers from the 2002 IEEE International Conference on Tools with Artificial Intelligence (2003).
Available: ps file (309 KB)

Nikos Papadopoulos

Nikos Papadopoulos & Dimitris Plexousakis,
The Role of Semantic Relevance in Dynamic User Community Management and the Formulation of Recommendations,
to appear in 14th International Conference on Advanced Information Systems Engineering, Toronto, 2002.
Available: pdf file (180 KB).

Nikos G. Papadopoulos:
Development of a system that provides adaptive recommendation services, based on dynamic user-communities management
Master of Science Thesis, Dept. of Computer Science, University of Crete, November 2001.
Available in Greek: pdf file (2,231 MB)

Manos Papagelis

Papagelis E., Plexousakis D., "Recommendation-based Discovery of Dynamic Virtual Communities", in Proeedings of CAiSE Forum 2003, pp. 197-200, Klagenfurt/Velden, Austria, June 16-20 (2003).
Available: pdf file (672 KB)

Dimitris Plexousakis

Katzagiannaki I., Plexousakis D., "Information Dissemination based on Semantic Relations", in Proceedings of CAiSE Forum 2003, pp. 245-248, Klagenfurt/Velden, Austria, June 16-20 (2003).
Available: pdf file (171 KB)

George Flouris, Dimitris Plexousakis & Grigoris Antoniou
Describing Knowledge Representation Schemes: a Formal Account,
Technical Report FORTH-ICS/TR-320, April 2003.
Available: pdf file (1.6 MB).

C. Houstis, S. Lalis, V.Christophides, D. Plexousakis, E. Vavalis, M. Pitikakis, K. Kritikos, A. Smardas,
A Data, Computation and Knowledge Grid: the case of the ARION system, Proc. of the 5th International Conference on Enterprise Information Systems (ICEIS2003), pp.359-365, Angers, France, April 23-26 , 2003.
Available: pdf file (276 KB)

N. Papadakis & D. Plexousakis,
The Ramification and Qualification Problems in Temporal Databases ,
Proceedings of the 2nd Hellenic Conference on Artificial Intelligence, Thessaloniki, Greece, April, 2002.
Available: pdf file (184 KB), compressed ps file (60 KB).

Nikos Papadakis & Dimitris Plexousakis,
The Ramification Problem in Temporal Databases,
submitted for publication, 2002.
Available: pdf file (85 KB).

S. Alexaki, N. Athanasis, V. Christophides, G. Karvounarakis, A. Maganaraki, D. Plexousakis & K. Tolle,
The ICS-FORTH RDFSuite: High-level Scalable Tools for the Semantic Web,
submitted for publication, 2002.
Available: pdf file (85 KB).

M. Koubarakis & D. Plexousakis,
A Formal Framework for Business Process Modeling and Design,
to appear in Information Systems, 2002.
Available: pdf file (314 KB), compressed ps file (100 KB).

G. Karvounarakis, V. Christophides & D. Plexousakis,
RQL: A Declarative Query Language for RDF,
D-Lib Magazine, Vol. 7, no. 12, December 2001.
Available: pdf file (27 KB), compressed ps file (49 KB).

George Flouris & Dimitris Plexousakis,
Belief Revision in Propositional Knowledge Bases,
8th Panhellenic Conference on Informatics, Nicosia, Cyprus, 8-10 November 2001.
Available: pdf file (324 KB), pdf file (213 KB).

Nikos Papadakis & Dimitris Plexousakis,
Action Theories in Temporal Databases,
8th Panhellenic Conference on Informatics, Nicosia, Cyprus, 8-10 November 2001.
Available: pdf file (186 KB), pdf file (66 KB).

George Flouris & Dimitris Plexousakis,
Belief Revision using Table Transformation,
Technical Report FORTH-ICS/TR-290, July 2001.
Available: pdf file (1.2 MB).

Sofia Alexaki, Vassilis Christophides, Greg Karvounarakis, Dimitris Plexousakis & Karsten Tolle,
The ICS-FORTH RDFSuite: Managing Voluminous RDF Description Bases,
Proc. of the 2nd International Workshop on the Semantic Web (SemWeb'01) in conjuction with Tenth International World Wide Web Conference (WWW10), pp. 1-13, Hong-Kong, May 1st, 2001.
Available: pdf file (547 KB), compressed ps file (234 KB).

Wes Cowley and Dimitrios Plexousakis,
Temporal Integrity Constraints with Indeterminacy,
Proc. of the 26th International Conference on Very Large Databases (VLDB 2000), Cairo, Egypt, September 2000.
Available:pdf file (235 KB).

Manolis Koubarakis & Dimitris Plexousakis,
A Formal Model for Business Process Modeling and Design,
Proceedings of CAISE'00, Stockholm, Sweden, pp. 142-157, June 2000.
Available: pdf file (214 KB), compressed ps file (52 KB).

Wes Cowley and Dimitrios Plexousakis,
An Interval Algebra for Indeterminate Time,
Proc. of the AAAI-2000, pp.470-475, Austin, Texas, August 2000.
Available: pdf file (85 KB), compressed ps file (39 KB).

Manolis Koubarakis & Dimitris Plexousakis,
Business Process Modelling and Design: A Formal Model and Methodology,
British Telecom Technical Journal, Special Issue on "The Emerging Enterprise", Vol. 17, No. 4, pp. 23-35, October 1999.
Available : pdf file (558 KB), compressed ps file (433 KB).

Manolis Koubarakis & Dimitris Plexousakis,
Business Process Modeling and Design: AI Models and Methodology,
IJCAI-99 Workshop on Intelligent Workflow and Process Management: The New Frontier for AI in Business, pp. 98-109, Stockholm, Sweden, 1999.
Available: pdf file (241 KB).

Dimitris Plexousakis & John Mylopoulos,
Accomodating Integrity Constraints During Database Design,
Proc. of the International Conference on Extending Database Technologies (EDBT), Avignon, France, March 25 - 29, 1996.
Available: pdf file (252 KB).

John Mylopoulos, Vinay K. Chaudhri, Dimitris Plexousakis, Adel Shrufi & Thodoros Topaloglou,
Building Knowledge Base Management Systems,
The VLDB Journal, Volume 5, Number 4, December 1996, pp. 238-263.

Dimitris Plexousakis:
On the efficient maintenance of temporal integrity in knowledge bases.
PhD thesis, Dept. of Computer Science, University of Toronto, 1996.
Available: pdf file (1306 KB).

Dimitris Plexousakis:
Compilation and Simplification of Temporal Integrity Constraints.
International Workshop on Rules in Database Systems (RIDS), Athens, Greece, September 25 - 27, 1995.
Available: pdf file (239 KB).

Dimitris Plexousakis:
Simulation and Analysis of Business Processes Using GOLOG.
In Proc. of the Conference on Organizational Computing Systems (COOCS'95), pp. 311-323, 1995.
Available: pdf file (231 KB).

J. Mylopoulos, V. Chaudhri, D. Plexousakis, A. Shrufi & T. Topaloglou,
Building knowledge base management systems,
The VLDB Journal, May 1995.
Available: pdf file (503 KB).

J. Mylopoulos, V. Chaudhri, D. Plexousakis, A. Shrufi & T. Topaloglou,
Building knowledge base management systems: A progress report,
Technical Report DKBS-TR-94-4, Dept. of Computer Science, University of Toronto, 1994.
Available: pdf file (466 KB).

J. Mylopoulos, V. Chaudhri, D. Plexousakis & T. Topaloglou,
Adapting database implementation techniques to managing very large knowledge bases,
In Proc. of the International Conference on Building and Sharing of Very Large-Scale Knowledge Bases '93, pages 215-224, Tokyo, Japan, December 1993.
Available: pdf file (129 KB).

Dimitris Plexousakis:
Integrity Constraint and Rule Maintenance in Temporal Deductive Knowledge Bases.
Proc. of the 19th International Conference on Very Large Data Bases (VLDB), pages 146-157, August 1993.
Available: pdf file (284 KB).

Nikolas Spyratos

Manos Theodorakis

Manos Theodorakis:
Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos,
A Theory of Context in Information Bases,
In Information Systems, 27(3), pp. 151-191, 2002
Available: pdf file (549 KB), compressed ps file (168 KB).

Contextualization: An Abstraction Mechanism for Information Modeling,
Doctoral Dissertation, Department of Computer Science, University of Crete, June 2001.
Available: pdf file (1 MB).

Manos Theodorakis:
Context-based Naming in Semantic Networks,
Proc. of the 3rd Doctoral Consortium on Advanced Information Systems Engineering (CAiSE'96), May 20-21, 1996, pp. 53-56.
Available: pdf file (113 KB), compressed ps file (32 KB).

Manos Theodorakis:
Name Scope In Semantic Data Models.
Technical Report FORTH-ICS/TR-141, October 1995.
Available in Greek: abstract - html file (4 KB), compressed ps file (446 KB).

Manos Theodorakis & Yannis Tzitzikas,
DOMENICUS: Art and Digital Technology.
Educational Journal, Pataki edition, December 1993 (in Greek).

Maria Theodoridou

Maria Theodoridou & Martin Doerr,
Mapping of the Encoded Archival Description DTD Element Set to the CIDOC CRM,
Technical Report FORTH-ICS/TR-289, June 2001.
Available: pdf file (226 KB).

Sotiris Tourtounis

Yannis Tzitzikas

Y.Tzitzikas,
Collaborative Ontology-based Information Indexing and retrieval. Doctoral Dissertation, Heraklion June 2002.
Available:pdf file (1.14 Mb)

Yannis Tzitzikas:
Democratic Data Fusion for Information Retrieval Mediators.
Proc. of the ACS/IEEE International Conference on Computer Systems and Applications, Beirut, Lebanon, June 26-29, 2001.
Available: pdf file (115 KB), compressed ps file (142 KB).

Yannis Tzitzikas:
Exploiting Semantic Networks to Generate Hypermedia.
3rd Doctoral Consortium on Advanced Information Systems Engineering, Heraklion, Crete, Greece, May 20-21, 1996.
Available: pdf file (105 KB), compressed ps file (25 KB).

Yannis Tzitzikas:
View Updates in Knowledge Bases.
Technical Report FORTH-ICS/TR-142, October 1995.
Available: compressed ps file (627 KB).

Manos Theodorakis & Yannis Tzitzikas,
DOMENICUS: Art and Digital Technology.
Educational Journal, Pataki edition, December 1993 (in Greek).


ICS > ISL > Publications


	Publications by author Sofia Alexaki G. Karvounarakis, A. Magkanaraki, S. Alexaki, V. Christophides, D. Plexousakis, M. Scholl, K. Tolle, RQL: A Functional Query Language for RDF, at The Functional Approach to Data Management: Modelling, Analyzing and Integrating Heterogeneous Data, P.M.D.Gray, L.Kerschberg, P.J.H.King, A.Poulovassilis (eds.), 2004 LNCS Series, Springer-Verlag, pp.435-465 Available: pdf file (536 KB) G. Karvounarakis, A. Magkanaraki, S. Alexaki, V. Christophides, D. Plexousakis, M. Scholl, K. Tolle, Querying the Semantic Web with RQL, at Computer Networks and ISDN Systems Journal, Vol. 42(5), August 2003, pp. 617-640. Elsevier Science Available: pdf file (491 KB) S. Alexaki, N. Athanasis, V. Christophides, G. Karvounarakis, A. Maganaraki, D. Plexousakis & K. Tolle, The FORTH-ICS RDFSuite: High-level Scalable Tools for the Semantic Web, submitted for publication, 2002. Available: pdf file (85 KB). G. Karvounarakis, S. Alexaki, V. Christophides, D. Plexousakis, Michel Scholl, RQL: A Declarative Query Language for RDF, The Eleventh International World Wide Web Conference (WWW'02), Honolulu, Hawaii, USA, May 7-11, 2002. Available: pdf file (308 Kb) A. Magkanaraki, S. Alexaki, V. Christophides, and Dimitris Plexousakis, Benchmarking RDF Schemas for the Semantic Web, First International Semantic Web Conference (ISWC'02), Sardinia, Italy, June 9-12, 2002. Available: pdf file (590 KB) Anastasia Analyti Y. Tzitzikas, A. Analyti, and N. Spyratos, The Semantics of the Compound Term Composition Algebra, International Conference on Ontologies, DataBases, and Applications of Semantics for Large Scale Information Systems (ODBASE 2003), LNCS 2888, November 2003, pp. 970-985 Available: pdf file (163 Kb) Y. Tzitzikas, A. Analyti, N. Spyratos and P. Constantopoulos, An Algebraic Approach for Specifying Compound Terms in Faceted Taxonomies, Proceedings of the 13th European-Japanese Conference on Information Modelling and Knowledge Bases, EJC2003, Kitakyushu, Japan, June 2003. In book: Information Modelling and knowledge Bases XV, IOS Press, 2004, pp. 67-87 Available: pdf file (214 Kb) Y. Tzitzikas, N. Spyratos, P. Constantopoulos and A. Analyti, "Extended Faceted Taxonomies for Web Catalogs", Third International Conference on Web Information Systems Engineering, WISE 2002, Singapore, 12-14 December, 2002, pp. 192-204 Available: pdf file (141 KB) Yannis Tzitzikas, Nicolas Spyratos, Panos Constantopoulos and Anastasia Analyti, "Extended Faceted Ontologies", (short paper), Fourteenth International Conference on Advanced Information Systems Engineering, CAiSE-2002, Toronto, Canada, May 11-12, 2002. Available: compressed ps.gz file (57 KB) Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, A Theory of Context in Information Bases, In Information Systems, 27(3), pp. 151-191, 2002 Available: pdf file (549 KB), compressed ps file (168 KB). Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos, Deriving and Retrieving Contextual Categorical Information through Instance Inheritance, Fundamenta Informaticae 44 (2000), pp. 1-31, IOS Press. Available: pdf file (434 KB), compressed ps file (164 KB). Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, Contextualization as an Abstraction Mechanism for Conceptual Modelling, Proc. of the 18th Intern. Conference on Conceptual Modelling (ER '99), Paris, November 15-18, 1999, pp. 475-489. Available: pdf file (105 KB),compressed ps file (55 KB). Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, Querying Contextualized Information Bases, Proc. of the 24th Intern. Conference on Information and Communication Technologies and Programming (ICT&P ' 99), Plovdiv, Bulgaria, June 8-12, 1999. Available: pdf file (175 KB), compressed ps file (77 KB). Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, Contextualization as an Abstraction Mechanism for Conceptual Modelling, Technical Report FORTH-ICS/TR-255, April 1999. Available: compressed ps file (73 KB), pdf file (137 KB). Anastasia Analyti, Nicolas Spyratos, Panos Constantopoulos & Martin Doerr, Inheritance under Participation Constraints and Disjointness, Information Modeling and Knowledge Bases X,: H. Jaakkola, H. Kangassalo, E. Kawaguchi (eds.), 1999. Available: pdf file (265 KB), compressed ps file (79 KB). Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nikolas Spyratos, Context in Information Bases, Proc. of the 3rd IFCIS International Conference on Cooperative Information Systems (CoopIS ' 98), New York, USA, August 20-22, 1998, pp. 260-270. Available: abstract - html file (3 KB), pdf file (171 KB), compressed ps file (82 KB). Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos, Deriving and Retrieving Contextual Categorical Information through Instance Inheritance, Technical Report FORTH-ICS/TR-220, May 1998. Available: compressed ps file (129 KB) Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nikolas Spyratos, A Theory of Contexts in Information Bases, Technical Report FORTH-ICS/TR-216, March 1998. Available: pdf file (500 KB), compressed ps file (294 KB). Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos, On the Semantics of a Semantic Network, Fundamenta Informaticae 36 (1998), pp. 109-144, IOS Press. Available: pdf file (382 KB), compressed ps file (115 KB). Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos, Deriving Semantic Information through Property Covering and Inheritance, Data and Knowledge Engineering, 28, No. 1, 30, pp. 3-30, 1998. Available: pdf file (345 KB), compressed ps file (105 KB). Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, Specialization by Restriction and Schema Derivations, Information Systems, Vol. 23, No. 1, pp. 1-38, 1998. Available: pdf file (455 KB), compressed ps file (170 KB) Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, Deriving and retrieving Contextual Categorical Information through Instance Inheritance, Fundamenta Informaticae, Vol. 33, pp. 1-37, 1998. Available: pdf file (405 KB), compressed ps file (143 KB) Anastasia Analyti, Nicolas Spyratos, Panos Constantopoulos & Martin Doerr, Inheritance under Participation Constraints and Disjointness, Proc. of the 8th European-Japanese Conference on Information Modelling and Knowledge Bases, pp. 269-287, 1998. Available: pdf file (265 KB), compressed ps file (79 KB). Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos, Property Covering: A Powerfull Construct for Schema Derivations, Proc. of the 16th. International Conference on Conceptual Modeling (ER' 97), pp. 271-284, November 1997. Available: pdf file (201 KB), compressed ps file (55 KB) Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos, Property Covering: A Powerful Construct for Schema Derivations, Technical Report FORTH-ICS/TR-199, 28 pages, June 1997. Available: compressed ps file (91 KB). Anastasia Analyti, Nicolas Spyratos, Panos Constantopoulos & Martin Doerr, Inheritance under Participation Constraints and Disjointness, Technical Report FORTH-ICS/TR-198, 28 pages, June 1997. Available: compressed ps file (81 KB). Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos, On the Definition of Semantic Network Semantics, Technical Report FORTH-ICS/TR-187, 45 pages, February 1997. Available: pdf file (383 KB), compressed ps file (117 KB). Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, Specialization by Restriction and Schema Derivations. Technical Report FORTH-ICS/TR-176, 56 pages, October 1996. Available: compressed ps file (133.2 KB). Grigoris Antoniou Giorgos Flouris, Dimitris Plexousakis, Grigoris Antoniou AGM Postulates in Arbitrary Logics: Initial Results and Applications. Technical Report FORTH-ICS/TR-336, April 2004. Available: pdf file (994 Kb). Giorgos Flouris, Dimitris Plexousakis, Grigoris Antoniou Generalizing the AGM Postulates: Preliminary Results and Applications To appear in Belief Change 04 Subworkshop of International Workshop on Non-Monotonic Reasoning 2004 (NMR-04), June 6-8, 2004, Westin Whistler Resort and Spa, Whistler BC, Canada. Available: pdf file (374 KB). Flouris G., Plexousakis D., Antoniou G., On a Unifying Framework for Comparing Knowledge Representation Schemes, in Proceedings of the 10th International Workshop Knowledge Representation meets Databases (KRDB2003) Hamburg, Germany, Sept.15-16, (2003) Available: pdf file (134 KB) Flouris G., Plexousakis D., Antoniou G., On a Unifying Framework for Comparing Knowledge Representation Schemes, in Proceedings of the 10th International Workshop Knowledge Representation meets Databases (KRDB2003) Hamburg, Germany, Sept.15-16, (2003) Available: pdf file (134 KB) George Flouris, Dimitris Plexousakis & Grigoris Antoniou Describing Knowledge Representation Schemes: a Formal Account, Technical Report FORTH-ICS/TR-320, April 2003. Available: pdf file (1.6 MB). G. Antoniou, Embedding Defeasible Logic into Logic Programming. In Proc. 9th Panhellenic Conference in Inofrmatics (PCI’2003), pp. 80-89, LNCS, Springer 2003 Available: pdf file (190 KB) Chryssoula Bekiari Martin Doerr, Dimitris Plexousakis & Chryssoula Bekiari, A Metamodel for Part-Whole Relationships for Reasoning on Missing Parts and Reconstruction, Proc. of ER-2001, Yokohama, Japan, 2001. Available: Available: pdf file (368 KB), compressed ps file (1,3 MB). Panos Constantopoulos, Eythmis Fritzalas, Chryssoula Bekiari , Dimitris Agelakis & Daphne Chronaki, MAISTOR: a Structural Documentation System for Buildings, Proc. of the CAA 2000 (28th annual conference), Ljubljana, Slovenia, April 18 - 21, 2000. Available: pdf file (743 KB). Panos Constantopoulos, Chryssoula Bekiari & Eythymis Fritzalas, MAISTOR: Structural Documentation System, 1st Panhellenic Conference "Geographic Information Systems - Potentialities & Applications, Perspectives & Challenges", Athens, Divani Caravel Hotel, December 1999. Available: pdf file (1.5 MB). Chryssoula Bekiari & Martin Doerr, Documentation and Reasoning on Parts and Potential Wholes, Technical Report FORTH-ICS/TR-260, October 1999. Available: compressed ps file (899 KB), pdf file (636 KB). Chryssoula Bekiari & Martin Doerr, Documentation and Reasoning on Parts and Potential Wholes, Computer Applications in Archaeology, Conference 1999, Dublin Ireland, April 14-18, 1999. Available: compressed ps file (898 KB), pdf file (636 KB). Chryssoula Bekiari, Christina Gritzapi & Dimitrios Kalomoirakis, POLEMON: A Federated Database Management System for the Documentation, Management and Promotion of Cultural Heritage, Proc. of the 26th Conference on Computer Applications in Archaeology, Barchelona, March 24-28, 1998. Available: compressed ps file (367 KB) Chryssoula Bekiari, Theodosia Bitzou, Dimitris Calomirakis, Alexandra Caretsou, Dafni Chronaki, Panos Constantopoulos, Christina Gritzapi & Maria Lagogianni, DELTOS : conservation documentation and administration of site monuments and preserved buildings, Proc. of the III Convegno Internazionale di Archeologia e Informatica, Roma, November 22-25, 1995. Available: compressed ps file (1 MB) Pantos Pantos & Chryssoula Bekiari, POLEMON: A Project to Computerize the Monument Records at the Greek Ministry of Culture, Proc. of the Conference on Archaelogical Heritage: Inventory and Documentations Standards in Europe, Oxford, September 1995. Available: pdf file(22 KB), compressed ps file (19 KB) Dimitrios Calomirakis, Panos Constantopoulos, Maria Lagogianni, Chryssoula Bekiari, Theodosia Bitzou & Daphni Chronaki, DELTOS : Registration / Documentation of site monuments groups of monuments and preserved buildings, Conference on "Monuments Plotting: Methods and Requirements", National University of Athens, organized by Technical Chamber of Greece, Athens, November 30, 1993. Available in Greek: compressed ps file (717 KB). Chryssoula Bekiari, Panos Constantopoulos & Theodosia Bitzou, DELTOS : A Documentation System for the Antiquities and Preserved Buildings of Crete, Requirements Analysis, Technical Report FORTH-ICS/TR-60, October 1992. Available in Greek: compressed ps file (177 KB). Maria Moutsaki & Chryssoula Bekiari, Detailed Production Planning and Control for Process Industries, 3rd Panhellenic Conference on Computer Science, Athens, Greece, May 1991. Available in Greek: compressed ps file (55.2 KB) Theodosia Bitzou Chryssoula Bekiari, Theodosia Bitzou, Dimitris Calomirakis, Alexandra Caretsou, Dafni Chronaki, Panos Constantopoulos, Christina Gritzapi & Maria Lagogianni, DELTOS : conservation documentation and administration of site monuments and preserved buildings, Proc. of the III Convegno Internazionale di Archeologia e Informatica, Roma, November 22-25, 1995. Available: compressed ps file (1 MB) Dimitrios Calomirakis, Panos Constantopoulos, Maria Lagogianni, Chryssoula Bekiari, Theodosia Bitzou & Daphni Chronaki, DELTOS : Registration / Documentation of site monuments groups of monuments and preserved buildings, Conference on "Monuments Plotting: Methods and Requirements", National University of Athens, organized by Technical Chamber of Greece, Athens, November 30, 1993. Available in Greek: compressed ps file (717 KB). Chryssoula Bekiari, Panos Constantopoulos & Theodosia Bitzou, DELTOS : A Documentation System for the Antiquities and Preserved Buildings of Crete, Requirements Analysis, Technical Report FORTH-ICS/TR-60, October 1992. Available in Greek: compressed ps file (177 KB). Vassilis Christophides G. Karvounarakis, A. Magkanaraki, S. Alexaki, V. Christophides, D. Plexousakis, M. Scholl, K. Tolle, RQL: A Functional Query Language for RDF, at The Functional Approach to Data Management: Modelling, Analyzing and Integrating Heterogeneous Data, P.M.D.Gray, L.Kerschberg, P.J.H.King, A.Poulovassilis (eds.), 2004 LNCS Series, Springer-Verlag, pp.435-465 Available: pdf file (536 KB) G. Karvounarakis, A. Magkanaraki, S. Alexaki, V. Christophides, D. Plexousakis, M. Scholl, K. Tolle, Querying the Semantic Web with RQL, at Computer Networks and ISDN Systems Journal, Vol. 42(5), August 2003, pp. 617-640. Elsevier Science Available: pdf file (491 KB) A. Magkanaraki, V. Tannen, V. Christophides and D. Plexousakis, Viewing the Semantic Web Through RVL Lenses, Proc of the Second International Semantic Web Conference (ISWC'03), (LNCS 2870), pp.96-112, Sanibel Island, Florida, USA, 20-23 October, 2003. Available: pdf file (399 KB) V. Christophides, D. Plexousakis, M. Scholl, S. Tourtounis, On Labeling Schemes for the Semantic Web, Proc. of the 12th International World Wide Web Conference (WWW'03) pp. 544-555, Budapest, Hungary, May 20-24, 2003. Available: pdf file (265 KB) S. Alexaki, N. Athanasis, V. Christophides, G. Karvounarakis, A. Maganaraki, D. Plexousakis & K. Tolle, The FORTH-ICS RDFSuite: High-level Scalable Tools for the Semantic Web, submitted for publication, 2002. Available: pdf file (85 KB). A. Magkanaraki, S. Alexaki, V. Christophides, and Dimitris Plexousakis, Benchmarking RDF Schemas for the Semantic Web, First International Semantic Web Conference (ISWC'02), Sardinia, Italy, June 9-12, 2002. Available: pdf file (590 KB) N. Spyratos, Y. Tzitzikas, V. Christophides, On Personalizing the Catalogs of Web Portals, Special Track on Semantic Web at the 15th International FLAIRS'02 Conference, Florida, May 14-16, 2002. Available: pdf file (78 KB) G. Karvounarakis, S. Alexaki, V. Christophides, D. Plexousakis, Michel Scholl, RQL: A Declarative Query Language for RDF, The Eleventh International World Wide Web Conference (WWW'02), Honolulu, Hawaii, USA, May 7-11, 2002. Available: pdf file (308 Kb) G. Karvounarakis, V. Christophides & D. Plexousakis, RQL: A Declarative Query Language for RDF, D-Lib Magazine, Vol. 7, no. 12, December 2001. Available: pdf file (27 KB), compressed ps file (49 KB). V. Christophides, R. Hull, G. Karvounarakis, A. Kumar, G.Tong & M. Xong, Beyond Discrete E-Services: Composing Session-Oriented Services in Telecommunications , Proc. of the Second International Workshop on Technologies for e-Services (TES 2001) in conjuction with VLDB 2001 Conference, Rome, Italy September 14-15, pages 58-73, 2001. Available: pdf file (233 KB). V. Christophides, R. Hull & A. Kumar, Querying and Splicing of XML Workflows, Proc. of the Sixth International Conference on Cooperative Information Systems (CoopIS 2001), Trento, Italy September 5-7, 2001. Available: pdf file (250 KB). P. Constantopoulos, V. Christophides & D. Plexousakis, Semantic Web Workshop: Models, Architecture and Management Intelligence Magazine, 12(2), 2001 and SIGMOD Record, 30(3), 2001. Available: pdf file (89 KB), compressed ps file (155 KB). Sofia Alexaki, Vassilis Christophides, Greg Karvounarakis, Dimitris Plexousakis & Karsten Tolle, On Storing Voluminous RDF Description: The case of Web Portal Catalogs, Proc. of the 4th International Workshop on the Web and Databases (WebDB2001) in conjuction with ACM SIGMOD'01 Conference, Santa Barbara California USA, May 24-25, 2001. Available: pdf file (245 KB), compressed ps file (100 KB). Vassilis Christophides, Richard Hull, Akhil Kumar & Jerome Simeon, Workflow Mediation using VorteXML, Bulletin of the Technical Committee on Data Engineering , Volume 24 (1), pp. 40-45, March 2001. Available: pdf file (39 KB). Sofia Alexaki, Vassilis Christophides, Greg Karvounarakis, Dimitris Plexousakis & Karsten Tolle, The FORTH-ICS RDFSuite: Managing Voluminous RDF Description Bases, Proc. of the 2nd International Workshop on the Semantic Web (SemWeb'01) in conjuction with Tenth International World Wide Web Conference (WWW10), pp. 1-13, Hong-Kong, May 1st, 2001. Available: pdf file (547 KB), compressed ps file (234 KB). G. Karvounarakis, V. Christophides, D. Plexousakis, S. Alexaki, Querying RDF Descriptions for Community Web Portals, 17ièmes Journees Bases de Donnees Avancees (BDA'01), pp. 133-144, Agadir, Maroc, 29 Octobre - 2 Novembre, 2001. Available: pdf file (146 Kb) Vassilis Christophides, Dimitris Plexousakis, Gregory Karvounarakis & Sofia Alexaki, Declarative Languages for Querying Portal Catalogs, Proc. of the 1st "DELOS" Workshop on "Information Seeking, Searching and Querying in Digital Libraries", Zurich, Switzerland, December 11-12, 2000. Available: pdf file (171 KB). S. Alexaki, V. Christophides, G. Karvounarakis, D. Plexousakis, K. Tolle, B. Amann, I. Fundulaki, M. Scholl & A-M. Vercoustre, Managing RDF Metadata for Community Webs, Proc. of the 2nd International Workshop on The World Wide Web and Conceptual Modelling (WCM'2000) - ER Workshops, Salt Lake City, Utah US, October 2000, pp. 140-151. Available: pdf file (235 KB), compressed ps file (87 KB). Karsten Tolle & Vassilis Christophides, ICS-VRP: a Tool for Parsing and Validating RDF Metadata & Schemas, ERCIM News No.41, April 2000 (online edition). Available: html file (10 KB). Greg Karvounarakis, Vassilis Christophides & Dimitris Plexousakis, Querying Semistructured (Meta) Data and Schemas on the Web: The case of RDF & RDFS, Technical Report FORTH-ICS/TR-269, February 2000. Available: pdf file (397 KB), compressed ps file (155 KB). Vassilis Christophides, Sophie Cluet & Jérôme Siméon, On Wrapping Query Languages and Efficient XML Integration, In Proc. of the 2000 ACM SIGMOD Conference on Management of Data, pp. 141-152, Dallas, Texas, ACM Press,May 2000. Available: pdf file (410 KB). Yannis Velegrakis, Vassilis Christophides & Panos Constantopoulos, On Z39.50 wrapping and description logics, International Journal on Digital Libraries, Volume 3 Issue 3 (2000), pp. 208-220. Available: pdf file (287 KB). Yiannis Velegrakis, Vassilis Christophides & Panos Constantopoulos, Declarative Specification of Z39.50 Wrappers using Description Logics, Proc. of the ECDL' 99, pp. 381-402, Paris, France, September 1999. Available: compressed ps file (93 KB), html file (80 KB), pdf file (380 KB). Vassilis Christophides, Katerina Houstis, Spyros Lalis & Harikleia Tsalapata, Ontology-driven Integration of Scientific Repositories, Proc. of the 4th Workshop on Next Generation Information Technologies and Systems (NGITS ' 99), R. Y. Pinter and S. Tsur Editors, pp. 190-202, Zikhron-Yaakov, Israel, July 1999. Available: pdf file (182 KB), word file (114 KB). Vassilis Christophides, S. Cluet & J. Simeon, Optimization Techniques for Semistructured Integration Systems, Proc. of the Workshop on Foundations for Information Integration, S. Abiteboul & D. Florescu & A. Levy & G. Moerkotte editors, Dagstuhl Germany, June 1999. Available: pdf file (124 KB). Katerina Houstis, Christos Nikolaou, Spyros Lalis, Sarantos Kapidakis, Vassilis Christophides, Eric Simon & Anthony Thomasic, Towards a next generation of open scientific data repositories and services, In Special issue on Digital Libraries, CWI Quarterly (Centrum voor Wiskunde en Informatica), Amsterdam Netherlands, Vol. 12, No. 2, June 1999, pp. 111-132. Available: pdf file(224 KB), rtf file (312 KB). B.Birmingham, K. Bohm, V. Christophides, S. Cluet, A. Grespo, D. Kiskis, B. Leiner, C.Meghini, F. Rabitti, U. Roehm, H.J. Schek, H. Schuldt & P. Weinstein, Interoperability between Digital Libraries , EU-NSF Digital Library Working Group on Interoperability between Digital Libraries, January 1999. Available: htm file (65 KB). Bernd Amann, Vassilis Christophides, Irini Fundulaki, Michel Scholl & Anne-Marie Vercoustre, Intelligent Mediation of Cultural Information Sources, ERCIM News No.35, October 1998 (online edition). Available: html file (11 KB). A. Michard, Vassilis Christophides, M. Scholl, M. Stapleton, D. Sutcliffe & A-M. Vercoustre, The Aquarelle Ressource Discovery System, Computer Networks and ISDN Systems, Vol. 30, No. 13, Elsevier Science, August 1998. Available: abstract - html file (3 KB), paper - html file (70 KB), paper - compressed ps file (273 KB). C. Housti, Ch. Nikolaou, S. Lalis, S. Kapidakis & V. Christophides, Open Scientific Data Repositories Architecture, in: NSF Invitational Workshop on Distributed Information, Computation and Process Management for Scientific and Engineering Enviroments (DICPM), Hyatt Dulles, Herndon, Virginia, May 15-16, 1998. Available: html file(9 KB). Katerina Houstis, Christos Nikolaou, Spyros Lalis, Sarantos Kapidakis & Vassilis Christophides, Towards a next generation of open scientific data repositories and services, Technical Report FORTH-ICS/TR-219, May 1998. Available: compressed ps file(124 KB). Vassilis Christophides, Martin Doerr & Irini Fundulaki, The Aquarelle Folder Server, ERCIM NEWS No.33 "Special: Information Technology for Education and Training", April 1998. Available: compressed ps file (27.9 KB) Vassilis Christophides, Michel Scholl & Anne-Marie Vercoustre, Querying Heterogeneous Semi-Structured Data, ERCIM NEWS No.33, April 1998 (online edition). Available: html file (12 KB) Vassilis Christophides, Sophie Cluet, Guido Moerkotte & Jérôme Siméon, Optimizing Generalized Path Expressions Using Full Text Indexes, Networking and Information Systems Journal, Volume 1, No 2-3, pp. 177-194, 1998. Available: pdf file (324 KB). Vassilis Christophides, Martin Doerr & Irini Fundulaki, A Semantic Network Approach to Semi-Structured Documents Repositories, Proc. of the ERCIM Digital Libraries ' 97 Conference (ERDL'97), pp. 305-324, Pisa, Italy, November 1997. Available: pdf file (255 KB), compressed ps file (100 KB). S. Abiteboul, S. Cluet, V. Christophide, M. Tova, G. Moerkotte & J. Simon, Querying Documents in Object Databases, International Journal on Digital Libraries, Volume 1, No. 1, pp. 5-19, April 1997. Available: pdf file (271 KB). Vassilis Christophides, Sophie Cluet & Guido Moerkotte, Evaluating queries with generalized path expressions, Proc. of the 1996 ACM SIGMOD International Conference on Management of Data, Montreal, Quebec, Canada, pp. 413-422, June 4-6, 1996. Available: pdf file (224 KB). Vassilis Christophides & A. Rizk, Querying structured documents with hypertext links using OODBMS, Proc. of the ECHT ' 94 European Conference on Hypermedia Technologies, pp. 186-197, Edinburgh, U.K., September 1994. Available: pdf file (257 KB). Vassilis Christophides, Serge Abiteboul, Sophie Cluet & Michel Scholl, From Structured Documents to Novel Query Facilities, Proc. of the 1994 ACM SIGMOD International Conference on Management of Data, Minneapolis, Minnesota, May 24-27, 1994, pp. 313-324. Bernd Amann, Vassilis Christophides & Michel Scholl, HyperPATH/O2: Integrating Hypermedia Systems with Object-Oriented Database Systems, Proc. of the 4th International Conference on Database and Expert Systems Applications (DEXA'93), Prague, Czech Republic, September 6-8, 1993, pp. 709-720. Panos Constantopoulos Y. Tzitzikas, A. Analyti, N. Spyratos and P. Constantopoulos, An Algebraic Approach for Specifying Compound Terms in Faceted Taxonomies, Proceedings of the 13th European-Japanese Conference on Information Modelling and Knowledge Bases, EJC2003, Kitakyushu, Japan, June 2003. In book: Information Modelling and knowledge Bases XV, IOS Press, 2004, pp. 67-87 Available: pdf file (214 Kb) Y. Tzitzikas, N. Spyratos, P. Constantopoulos and A. Analyti, "Extended Faceted Taxonomies for Web Catalogs", Third International Conference on Web Information Systems Engineering, WISE 2002, Singapore, 12-14 December, 2002, pp. 192-204 Available: pdf file (141 KB) Y. Tzitzikas, N. Spyratos and P. Constantopoulos, "Deriving Valid Expressions from Ontology Definitions", Proceedings of the 11th European-Japanese Conference on Information Modelling and Knowledge Bases, Maribor, Slovenia, 29 May-1 June, 2001. In Information Modelling and Knowledge Bases XIII, Kangassalo H., Welzer T., Jaakkola H., Rozman I., Kawaguchi E. (editors), IOS Press, Amsterdam, 2002. Available: Compressed ps.gz file (238 KB) Yannis Tzitzikas, Nicolas Spyratos, Panos Constantopoulos and Anastasia Analyti, "Extended Faceted Ontologies", (short paper), Fourteenth International Conference on Advanced Information Systems Engineering, CAiSE-2002, Toronto, Canada, May 11-12, 2002. Available: compressed ps.gz file (57 KB) Yannis Tzitzikas, Nicolas Spyratos and Panos Constantopoulos, "Query Evaluation for Mediators over Web Catalogs", Proceedings of 27th International Conference on Information and Communication Technologies and Programming, ICT&P 2002, Primorsko, Bulgaria, June 24-29, 2002. Aslo published in International Journal of Information Theories and Applications, 9(2), 2002. Available: compressed ps.gz file (73 KB) Yannis Tzitzikas, Nicolas Spyratos and Panos Constantopoulos, "Query Translation for Mediators over Ontology-based Information Sources", Second Hellenic Conference on Artificial Intelligence, SENT-2002, Thessaloniki, Greece, April 11-12, 2002. Available: compressed ps.gz file (104 KB) Panos Constantopoulos, Martin Doerr, Maria Theodoridou, Manolis Tzobanakis "Historical documents as monuments and as sources", Computer Applications and Quantitative Methods in Archaeology Conference, CAA2002, 2-6 April, 2002, Heraklion, Greece. Available: pdf file (307 KB). Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, A Theory of Context in Information Bases, In Information Systems, 27(3), pp. 151-191, 2002 Available: pdf file (549 KB), compressed ps file (168 KB). Yannis Tzitzikas, Nicolas Spyratos and Panos Constantopoulos, Mediators over Ontology-based Information Sources, Second International Conference on Web Information Systems Engineering, WISE 2001, Kyoto, Japan, Dec 3-6, 2001. Available: pdf file (161 KB), compressed ps file (78 KB). P. Constantopoulos, V. Christophides & D. Plexousakis, Semantic Web Workshop: Models, Architecture and Management Intelligence Magazine, 12(2), 2001 and SIGMOD Record, 30(3), 2001. Available: pdf file (89 KB), compressed ps file (155 KB). Yannis Tzitzikas, Nicolas Spyratos & Panos Constantopoulos, Deriving Valid Expressions from Ontology Definitions, Proc. of the 11th European-Japanese Conference on Information Modelling and Knowledge Bases, Maribor, Slovenia, May 29 - June 1, 2001. Available: pdf file (255 KB), compressed ps file (238 KB) Yannis Tzitzikas & Panos Constantopoulos, A Decision-theoretic Model for Information Retrieval Supporting Time Constraints, Proc. of the BCS-IRSG European Colloquium on IR Research, Darmstadt, Germany, April 4-6, 2001. Available: pdf file (122 KB),compressed ps file (116 KB) Panos Constantopoulos, Eythmis Fritzalas, Chryssoula Bekiari , Dimitris Agelakis & Daphne Chronaki, MAISTOR: a Structural Documentation System for Buildings, Proc. of the CAA 2000 (28th annual conference), Ljubljana, Slovenia, April 18 - 21, 2000. Available: pdf file (743 KB). Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos, Deriving and Retrieving Contextual Categorical Information through Instance Inheritance, Fundamenta Informaticae 44 (2000), pp. 1-31, IOS Press. Available: pdf file (434 KB), compressed ps file (164 KB). Yannis Velegrakis, Vassilis Christophides & Panos Constantopoulos, On Z39.50 wrapping and description logics, International Journal on Digital Libraries, Volume 3 Issue 3 (2000), pp. 208-220. Available: pdf file (287 KB). Panos Constantopoulos, Chryssoula Bekiari & Eythymis Fritzalas, MAISTOR: Structural Documentation System, 1st Panhellenic Conference "Geographic Information Systems - Potentialities & Applications, Perspectives & Challenges", Athens, Divani Caraver Hotel, December 1999. Available: pdf file (1.5 MB). Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, Contextualization as an Abstraction Mechanism for Conceptual Modelling, Proc. of the 18th Intern. Conference on Conceptual Modelling (ER '99), Paris, November 15-18, 1999, pp. 475-489. Available: pdf file (105 KB),compressed ps file (55 KB). Yiannis Velegrakis, Vassilis Christophides & Panos Constantopoulos, Declarative Specification of Z39.50 Wrappers using Description Logics, Proc. of the ECDL' 99, pp. 381-402, Paris, France, September 1999. Available: compressed ps file (93 KB), html file (80 KB), pdf file (380 KB). Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, Querying Contextualized Information Bases, Proc. of the 24th Intern. Conference on Information and Communication Technologies and Programming (ICT&P ' 99), Plovdiv, Bulgaria, June 8-12, 1999. Available: pdf file (175 KB), compressed ps file (77 KB). Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, Contextualization as an Abstraction Mechanism for Conceptual Modelling, Technical Report FORTH-ICS/TR-255, April 1999. Available: compressed ps file (73 KB), pdf file (137 KB). Anastasia Analyti, Nicolas Spyratos, Panos Constantopoulos & Martin Doerr, Inheritance under Participation Constraints and Disjointness, Information Modeling and Knowledge Bases X,: H. Jaakkola, H. Kangassalo, E. Kawaguchi (eds.), 1999. Available: pdf file (265 KB), compressed ps file (79 KB). Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nikolas Spyratos, Context in Information Bases, Proc. of the 3rd IFCIS International Conference on Cooperative Information Systems (CoopIS ' 98), New York, USA, August 20-22, 1998, pp. 260-270. Available: abstract - html file (3 KB), pdf file (171 KB), compressed ps file (82 KB). Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos, Deriving and Retrieving Contextual Categorical Information through Instance Inheritance, Technical Report FORTH-ICS/TR-220, May 1998. Available: compressed ps file (129 KB) Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nikolas Spyratos, A Theory of Contexts in Information Bases, Technical Report FORTH-ICS/TR-216, March 1998. Available: pdf file (500 KB), compressed ps file (294 KB). Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos, On the Semantics of a Semantic Network, Fundamenta Informaticae 36 (1998), pp. 109-144, IOS Press. Available: pdf file (382 KB), compressed ps file (115 KB). Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos, Deriving Semantic Information through Property Covering and Inheritance, Data and Knowledge Engineering, 28, No. 1, 30, pp. 3-30, 1998. Available: pdf file (345 KB), compressed ps file (105 KB). Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, Specialization by Restriction and Schema Derivations, Information Systems, Vol. 23, No. 1, pp. 1-38, 1998. Available: pdf file (455 KB), compressed ps file (170 KB) Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, Deriving and retrieving Contextual Categorical Information through Instance Inheritance, Fundamenta Informaticae, Vol. 33, pp. 1-37, 1998. Available: pdf file (405 KB), compressed ps file (143 KB) Anastasia Analyti, Nicolas Spyratos, Panos Constantopoulos & Martin Doerr, Inheritance under Participation Constraints and Disjointness, Proc. of the 8th European-Japanese Conference on Information Modelling and Knowledge Bases, pp. 269-287, 1998. Available: pdf file (265 KB), compressed ps file (79 KB). Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos, Property Covering: A Powerfull Construct for Schema Derivations, Proc. of the 16th. International Conference on Conceptual Modeling (ER' 97), pp. 271-284, November 1997. Available: pdf file (201 KB), compressed ps file (55 KB) Marios Sintichakis & Panos Constantopoulos, A Method for Monolingual Thesauri Merging, Proc. of the 20th International ACM SIGIR Conference on Research and Development in Information Retrieval, Philadelphia, PA, USA, July 1997. Available: pdf file (246 KB), compressed ps file (65 KB). Manos Theodorakis & Panos Constantopoulos, On Context-based Naming in Information Bases, Proc. of the 2nd IFCIS International Conference on Cooperative Information Systems (CoopIS ' 97), Charleston, South Carolina, USA, June 24-27, 1997, pp. 140-149. Available: abstract - html file (3 KB), html file (67 KB), compressed ps file (60.3 KB). Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos, Property Covering: A Powerful Construct for Schema Derivations, Technical Report FORTH-ICS/TR-199, 28 pages, June 1997. Available: compressed ps file (91 KB). Anastasia Analyti, Nicolas Spyratos, Panos Constantopoulos & Martin Doerr, Inheritance under Participation Constraints and Disjointness, Technical Report FORTH-ICS/TR-198, 28 pages, June 1997. Available: compressed ps file (81 KB). Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos, On the Definition of Semantic Network Semantics, Technical Report FORTH-ICS/TR-187, 45 pages, February 1997. Available: pdf file (383 KB), compressed ps file (117 KB). Manos Theodorakis & Panos Constantopoulos, Context-Based Naming in Information Bases, International Journal of Cooperative Information Systems, Vol. 6, Nos. 3 & 4 (1997), pp. 269-292. Available: abstract - html file (3 KB), html file (75 KB), pdf file (284 KB), compressed ps file (87 KB). Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, Specialization by Restriction and Schema Derivations. Technical Report FORTH-ICS/TR-176, 56 pages, October 1996. Available: compressed ps file (133.2 KB). Panos Constantopoulos & Maria Christoforaki, Dictionary of terms of CLIO cultural documentation system, Technical Report FORTH-ICS/TR-175, 17 pages, October 1996. Available in Greek: compressed ps file (242 KB). George Spanoudakis & Panos Constantopoulos, An Evidential Model for Estimating the Salience of Attributes in Classification Schemes, Computer Science Technical Report No. 1996/05, City University London, July 1996. Available: pdf file (191 KB), compressed ps file (984 KB). Panos Constantopoulos & Yannis Tzitzikas, Context-Driven Information Base Update, Proc. of the 8th International Conference, CAiSE'96, pp. 319-344, Heraklion, Crete, Greece, May 20-24, 1996. Available: pdf file (233 KB), compressed ps file (243 KB). Panos Constantopoulos, Manos Theodorakis & Yannis Tzitzikas, Developing Hypermedia Over an Information Repository, Proc. of the 2nd WorkShop on Open Hypermedia Systems (OHS) on Hypertext' 96 (HT ' 96), Washington, DC, USA, March 16-17, 1996. Available: pdf file (63 KB), compressed ps file (144 KB). George Spanoudakis & Panos Constantopoulos, Analogical Reuse of Requirements Specifications: A Computational Model, Applied Artificial Intelligence: An International Journal, Vol. 10, No. 4, pp. 281-306, 1996. Available: pdf file (310 KB), compressed ps file (101 KB). George Spanoudakis & Panos Constantopoulos, Elaborating Analogies from Conceptual Models, International Journal of Intelligent Systems, (eds) Yager R., J.Wiley and Sons, Vol. 11, No 11, pp. 917-974, 1996. Available: pdf file (222 KB), compressed ps file (168 KB). George Spanoudakis & Panos Constantopoulos, Integrating Specifications: A Similarity Reasoning Approach, Automated Software Engineering Journal, Vol. 2, No. 4, pp. 311-342, December 1995. Available: pdf file (339 KB), compressed ps file (158 KB). Chryssoula Bekiari, Theodosia Bitzou, Dimitris Calomirakis, Alexandra Caretsou, Dafni Chronaki, Panos Constantopoulos, Christina Gritzapi & Maria Lagogianni, DELTOS : conservation documentation and administration of site monuments and preserved buildings, Proc. of the III Convegno Internazionale di Archeologia e Informatica, Roma, November 22-25, 1995. Available: compressed ps file (1 MB) Maria Christoforaki, Panos Constantopoulos & Martin Doerr, Modelling occurences in cultural documentation, Proc. of the III Convegno Internazionale di Archeologia e Informatica, Roma, November 22-25, 1995. Available: abstract - compressed ps file (8.18 KB), paper - compressed ps file (61.6 KB). Panos Constantopoulos & Martin Doerr, An Approach to Indexing Annotated Images, Proc. of the International Conference on Hypermedia and Interactivity in Museums - ICHIM '95, San Diego, CA., USA, October 1995. Available: pdf file (361 KB), compressed ps file (1.45 MB) N.A.M. Maiden, P. Assenova, P. Constantopoulos & M. Jarke, Computational Mechanisms for Distributed Requirements Engineering, Proc. of the 7th International Conference Software Engineering and Knowledge Engineering - SEKE '95, Maryland, USA, June 1995. Available: compressed ps file (44.7 KB) P. Constantopoulos, M. Jarke, J. Mylopoulos & Y. Vassiliou, The Software Information Base: A Server for Reuse, in: VLDB Journal, Vol. 4, No. 1, pp. 1-43, January 1995. Available: pdf file (453 KB), compressed ps file (218 KB). Panos Constantopoulos & Martin Doerr, Component Classification in the Software Information Base, in: O. Nierstrasz and D. Tsichritzis, eds., Object-Oriented Software Composition, Prentice-Hall, 1995. Available: compressed ps file (75.9 KB) George Spanoudakis, Panos Constantopoulos & Miranta Kiprioti, Similarity Analysis for Process Modelling of Requirements Engineering, Dagstuhl Seminar on System Requirements: Analysis, Management and Exploitation, Dagstuhl, Germany, October 1994. Available: compressed ps file (148.2 KB) George Spanoudakis & Panos Constantopoulos, Integrating Specifications, Dagstuhl Seminar on System Requirements: Analysis, Management and Exploitation, Dagstuhl, Germany, October 1994. Available: compressed ps file (56.8 KB) George Spanoudakis & Panos Constantopoulos, On Evidential Feature Salience, Proc. of the 5th International Conference on Database and Expert Systems Applications - DEXA '94, Athens, Greece, September 1994. Available: pdf file (43 KB), compressed ps file (36 KB) Panos Constantopoulos, Thalis Georgiou & Nikos Tsatsakis, One-machine scheduling with setup times: fast solutions and applications, Proc. of the IFIP Conference on Advanced Production Management Systems, Athens, Greece, September 1994. Available: compressed ps file (21.79 KB) Panos Constantopoulos & George Spanoudakis, Similarity for Analogical Software Reuse: A Computational Model, Proc. of the 11th European Conference on Artificial Intelligence - ECAI '94, pp. 18-22, Amsterdam, The Netherlands, August 1994. Available: pdf file (44 KB), compressed ps file (36 KB). George Spanoudakis & Panos Constantopoulos, Measuring Similarity Between Software Artifacts, Proc. of the 6th International Conference on Software Engineering and Knowledge Engineering - SEKE '94, Jurmala, Latvia, June 1994. Available: pdf file (113 KB), compressed ps file (70 KB). Panos Constantopoulos: Cultural Documentation: The CLIO System. Technical Report FORTH-ICS/TR-115, 12 pages, January 1994. Available in English: compressed ps file (379 KB). Available in Greek: compressed ps file (373.95 KB). Dimitrios Calomirakis, Panos Constantopoulos, Maria Lagogianni, Chryssoula Bekiari, Theodosia Bitzou & Daphni Chronaki, DELTOS : Registration / Documentation of site monuments groups of monuments and preserved buildings, Conference on "Monuments Plotting: Methods and Requirements", National University of Athens, organized by Technical Chamber of Greece, Athens, November 30, 1993. Available in Greek: compressed ps file (717 KB). M. Jarke, K. Pohl, S. Jacobs, H. Nissen, J. Bubenko, P. Assenova, P. Holm, B. Wangler, C. Rolland, V. Plihon, J.-R. Schmitt, A. Sutcliffe, S. Jones, N. Maiden, D. Till, Y. Vassiliou, P. Constantopoulos & G. Spanoudakis, Requirements Engineering: An Integrated View of Representation, Process & Domain, Proc. of the 4th European Conference on Software Engineering, Garmisch-Partenkirchen, Germany, September 1993. Available: compressed ps file (74.9 KB) Panos Constantopoulos, Martin Doerr & Yiannis Vassiliou, Repositories for Software Reuse: The Software Information Base, Proc. of the IFIP WG 8.1 Conference on Information System Development Process, Como, Italy, September 1993. Available: pdf file (341 KB), compressed ps file (153 KB). George Spanoudakis & Panos Constantopoulos, Similarity for Analogical Software Reuse: A Conceptual Modelling Approach, Proc. of the 5th International Conference on Advanced Information Systems Engineering - CAiSE '93, Paris, France, June 1993. Available: pdf file (60 KB), compressed ps file (45 KB). Chryssoula Bekiari, Panos Constantopoulos & Theodosia Bitzou, DELTOS : A Documentation System for the Antiquities and Preserved Buildings of Crete, Requirements Analysis, Technical Report FORTH-ICS/TR-60, October 1992. Available in Greek: compressed ps file (177 KB). Panos Constantopoulos & Elena Pataki, A Browser for Software Reuse, Proc. of the 4th International Conference on Advanced Information Systems Engineering - CAiSE '92, Manchester, U.K., May 1992. Available: pdf file (331 KB), compressed ps file (147 KB). Maria Moutsaki & Panos Constantopoulos, HEPHESTUS : Production Planning and Control System for Raw Material Industries, User Manual. Technical Report FORTH-ICS/TR-45, January 1992. Available in Greek: compressed ps file (246 KB). Panos Constantopoulos, J.Drakopoulos & Y.Yeorgaroudakis, Retrieval of Multimedia Documents by Pictorial Content: A Prototype System, Proc. of the International Conference on Multimedia Information Systems, ACM SIGIR, Singapore, January 1991. Panos Constantopoulos, F.C. Schweppe & R.C. Larson, ESTIA: A Real-Time Consumer Control Scheme for Space Conditioning Usage under Spot Electricity Pricing, Computers and Operations Research, Vol. 18, No. 8, 1991, pp. 751-765. Panos Constantopoulos, E.Lutz, P.Savino & Y.Yeorgaroudakis, Multimedia Document Storage, Classification and Retrieval: Integrating the MULTOS System, Proc. of the ESPRIT Conference '89, Brussels, November 1989. Panos Constantopoulos, V.I.Leopoulos & I.P.Tatsiopoulos, Production planning and control as the key to integration in small industrial firms: An implementation approach and a case study, Proc. of the 5th CIM Europe Conference, Athens, Greece, May 1989. Panos Constantopoulos: Decision Support for Massive Personnel Assignment. Decision Support Systems, Vol. 5, 1989, pp. 355-363. Panos Constantopoulos, Y. Yeorgaroudakis, A. Matteucci & G. Pancaccini, Client Design for the MULTOS Multimedia Filing System, Proc. of the ESPRIT Conference '88, Brussels 1988. Panos Constantopoulos, Maria Theodoridou & Y. Yeorgaroudakis, Flexible Query Formulation for Multimedia Document Retrieval, Proc. of the Conference on Information Technology for Organisational Systems, Athens, Greece, 1988. Panos Constantopoulos, G.Drettakis, E.Petra, Maria Theodoridou & Y.Yeorgaroudakis, Iterative Design of User Interfaces for an Office System Using a UIMS, Proc. of the Conference on Information Technology for Organisational Systems, Athens, Greece, 1988. Panos Constantopoulos, G.Drettakis, E.Petra, Maria Theodoridou & Y. Yeorgaroudakis, Multimedia Office System Interface Design Using a UIMS, Proc. of the IFIP WG 8.4 Working Conference "Office Information Systems: The Design Process", Linz, Austria, 1988. Panos Constantopoulos, et al., MUSE : A Multimedia System, IEEE Office Knowledge Engineering, Vol.1, No.1, February 1987. Panos Constantopoulos, et al., Office Document Retrieval in MULTOS, Proc. of the ESPRIT Conference '86, Brussels, Belgium, November 1986. Martin Doerr Martin Doerr The CIDOC CRM – An Ontological Approach to Semantic Interoperability of Metadata, AI Magazine, Volume 24, Number 3 (2003). Available: pdf file (548 kb) M. Doerr, J. Hunter, C. Lagoze Towards a Core Ontology for Information Integration, in Journal of Digital information, volume 4 issue 1, April 2003 Available: pdf file (109 Kb) and http://jodi.ecs.soton.ac.uk/Articles/v04/i01/Doerr/ Nick Crofts, Martin Doerr and Tony Gill The CIDOC Conceptual Reference Model A Standard for Communicating Cultural Contents, in Cultivate Interactive, Issue 9, February 2003 Available html file (66 kb) Panos Constantopoulos, Martin Doerr, Maria Theodoridou, Manolis Tzobanakis "Historical documents as monuments and as sources", Computer Applications and Quantitative Methods in Archaeology Conference, CAA2002, 2-6 April, 2002, Heraklion, Greece. Available: pdf file (307 KB). Martin Doerr, Dimitris Plexousakis & Chryssoula Bekiari, A Metamodel for Part-Whole Relationships for Reasoning on Missing Parts and Reconstruction, Proc. of ER-2001, Yokohama, Japan, 2001. Available: Available: pdf file (368 KB), compressed ps file (1,3 MB). Nick Crofts, Ifigenia Dionissiadou, Martin Doerr & Matthew Stiff, Definition of the CIDOC object-oriented Conceptual Reference Model, Version 3.2, ISO Working Document ISO/TC46/SC4/WG9/2, July 2001. Available: pdf file (558 KB), compressed ps file (1.2 MB). Maria Theodoridou & Martin Doerr, Mapping of the Encoded Archival Description DTD Element Set to the CIDOC CRM, Technical Report FORTH-ICS/TR-289, June 2001. Available: pdf file (226 KB). Martin Doerr: Mapping of the AMICO data dictionary to the CIDOC CRM. Technical Report FORTH-ICS/TR-288, June 2001. Available: pdf file (142 KB). Martin Doerr: Semantic Problems of Thesaurus Mapping. Journal of Digital Information: Special issue on Networked Knowledge Organization Systems, Volume 1, issue 8, April 2001. Available: JoDI web journal. Martin Doerr: Mapping of the Dublin Core Metadata Element Set to the CIDOC CRM. Technical Report FORTH-ICS/TR-274, July 2000. Available: compressed ps file (309 KB), rtf file (103 KB). Martin Doerr & Demetrios Kalomoirakis, A Metastructure for Archeological Terminology , Proc. of the CAA 2000 (28th annual conference), Ljubljana, Slovenia, April 18 - 21, 2000. Available: pdf file (527 KB). Chryssoula Bekiari & Martin Doerr, Documentation and Reasoning on Parts and Potential Wholes, Technical Report FORTH-ICS/TR-260, October 1999. Available: compressed ps file (899 KB), pdf file (636 KB). Martin Doerr & Nicholas Crofts, Electronic Esperanto: The Role of the Object Oriented CIDOC Reference Model, Proc. of the ICHIM '99, Washington DC, September 22-26, 1999. Available: doc file(153 KB). Martin Doerr & Nicholas Crofts, Introduction on the CIDOC Conceptual Reference Model, Workshop held on ICHIM' 99, Washington, September 1999. Available: html file. Chryssoula Bekiari & Martin Doerr, Documentation and Reasoning on Parts and Potential Wholes, Computer Applications in Archaeology, Conference 1999, Dublin Ireland, April 14-18, 1999. Available: compressed ps file (898 KB), pdf file (636 KB). Anastasia Analyti, Nicolas Spyratos, Panos Constantopoulos & Martin Doerr, Inheritance under Participation Constraints and Disjointness, Information Modeling and Knowledge Bases X,: H. Jaakkola, H. Kangassalo, E. Kawaguchi (eds.), 1999. Available: pdf file (265 KB), compressed ps file (79 KB). Martin Doerr & Anthi Yiortsou, Implementing a Temporal Datatype, Technical Report FORTH-ICS/TR-236, 16 pages, November 1998. Available: compressed ps file (49 KB). Martin Doerr & Nick Crofts, Electronic Communication on Diverse Data - The Role of an Object-Oriented CIDOC Reference Model, CIDOC'98 Conference, Melbourne, 10-14 October 1998. Available: compressed ps file (137 KB) Martin Doerr & Irini Fundulaki, SIS - TMS: A Thesaurus Management System for Distributed Digital Collections, Proc. of the 2nd European Conference, ECDL'98, Heraklion, Crete, Greece, September 1998, pp. 215-234. Available: compressed ps file (259 KB) Maria Theodoridou & Martin Doerr, Classifying Historical Documents, Proc. of the Intern. Conference on Applications of Information Technologies to Biblical Studies, OSI-HESP SUMMER SCHOOL, Sofia, Bulgaria, July 27 - August 7, 1998. Available: html file (11 KB), compressed ps file (72 KB). Martin Doerr: Effective Terminology Support for Distributed Digital Collections, in: SIXTH DELOS WORKSHOP, Preservation of Digital Information, Tomar, Portugal June 17-19, 1998. ISBN 2-912335-06. Available: compressed ps file (79.9 KB) Martin Doerr & Irini Fundulaki, The Aquarelle Terminology Service, ERCIM NEWS No.33 "Special:Information Technology for Education and Training", April 1998. Available: compressed ps file (23.6 KB) Vassilis Christophides, Martin Doerr & Irini Fundulaki, The Aquarelle Folder Server, ERCIM NEWS No.33 "Special: Information Technology for Education and Training", April 1998. Available: compressed ps file (27.9 KB) Martin Doerr: Multilingual Terminology Management for Distributed Digital Collections. Workshop on "Electronic Lexicography", Athens, Greece, March 14, 1998. Martin Doerr & Irini Fundulaki, A proposal on extended interthesaurus links semantics, Technical Report FORTH-ICS/TR-215, 9 pages, March 1998. Available: compressed ps file (43 KB). Anastasia Analyti, Nicolas Spyratos, Panos Constantopoulos & Martin Doerr, Inheritance under Participation Constraints and Disjointness, Proc. of the 8th European-Japanese Conference on Information Modelling and Knowledge Bases, pp. 269-287, 1998. Available: pdf file (265 KB), compressed ps file (79 KB). K. Chandrinos, J. Immerkaer, M. Doerr & P. Trahanias, A Visual Tagging Technique for Annotating Large-Volume Multimedia Databases - A tool for adding semantic value to improve information rating, 5th DELOS Workshop "Filtering and Collaborative Filtering", European Research Consortium for Informatics and Mathematics (ERCIM), Budapest, November 10-12, 1997. Vassilis Christophides, Martin Doerr & Irini Fundulaki, A Semantic Network Approach to Semi-Structured Documents Repositories, Proc. of the ERCIM Digital Libraries ' 97 Conference (ERDL'97), pp. 305-324, Pisa, Italy, November 1997. Available: pdf file (255 KB), compressed ps file (100 KB). Martin Doerr: Reference Information Acquisition and Coordination, in: ASIS'97-Digital Collections: Implications for Users, Funders, Developers and Maintainers, Proc. of the 60th Annual Meeting of the American Society for Information Sciences, Washington, DC, USA, pp. 295-312, November 1997. Available: compressed ps file (201.43 KB) Anastasia Analyti, Nicolas Spyratos, Panos Constantopoulos & Martin Doerr, Inheritance under Participation Constraints and Disjointness, Technical Report FORTH-ICS/TR-198, 28 pages, June 1997. Available: compressed ps file (81 KB). Martin Doerr: Authority Services in Global Information Spaces: A requirements analysis and feasibility study. Technical Report FORTH-ICS/TR-163, 19 pages, February 1996. Available: compressed ps file (47 KB). Maria Christoforaki, Panos Constantopoulos & Martin Doerr, Modelling occurences in cultural documentation, Proc. of the III Convegno Internazionale di Archeologia e Informatica, Roma, November 22-25, 1995. Available: abstract - compressed ps file (8.18 KB), paper - compressed ps file (61.6 KB). Panos Constantopoulos & Martin Doerr, An Approach to Indexing Annotated Images, Proc. of the International Conference on Hypermedia and Interactivity in Museums - ICHIM '95, San Diego, CA., USA, October 1995. Available: pdf file (361 KB), compressed ps file (1.45 MB) Panos Constantopoulos & Martin Doerr, Component Classification in the Software Information Base, in: O. Nierstrasz and D. Tsichritzis, eds., Object-Oriented Software Composition, Prentice-Hall, 1995. Available: compressed ps file (75.9 KB) Ifigenia Dionysiadou & Martin Doerr, Mapping of material culture to a semantic network, Proc. of the 1994 JOINT ANNUAL MEETING, International Council of Museums Documentation Committee and Computer Network, Wasington USA, August 1994. Available: compressed ps file (23.5 KB) Panos Constantopoulos, Martin Doerr & Yiannis Vassiliou, Repositories for Software Reuse: The Software Information Base, Proc. of the IFIP WG 8.1 Conference on Information System Development Process, Como, Italy, September 1993. Available: pdf file (341 KB), compressed ps file (153 KB). Giorgos Flouris Giorgos Flouris, Dimitris Plexousakis, Grigoris Antoniou AGM Postulates in Arbitrary Logics: Initial Results and Applications. Technical Report FORTH-ICS/TR-336, April 2004. Available: pdf file (994 Kb). Giorgos Flouris, Dimitris Plexousakis, Grigoris Antoniou Generalizing the AGM Postulates: Preliminary Results and Applications To appear in Belief Change 04 Subworkshop of International Workshop on Non-Monotonic Reasoning 2004 (NMR-04), June 6-8, 2004, Westin Whistler Resort and Spa, Whistler BC, Canada. Available: pdf file (374 KB). Flouris G., Plexousakis D., Antoniou G., "On a Unifying Framework for Comparing Knowledge Representation Schemes", in Proceedings of the 10th International Workshop Knowledge Representation meets Databases (KRDB2003) Hamburg, Germany, Sept.15-16, (2003) Available: pdf (134 KB) Flouris G., Plexousakis D., Antoniou G., On a Unifying Framework for Comparing Knowledge Representation Schemes, in Proceedings of the 10th International Workshop Knowledge Representation meets Databases (KRDB2003) Hamburg, Germany, Sept.15-16, (2003) Available: pdf file (134 KB) George Flouris, Dimitris Plexousakis On the Use of Matrices for Belief Revision, IIn LNCS 2563, "Advances in Informatics 8th Panhellenic Conference in Informatics". Yannis Manolopoulos, Skevos Evripidou, Antonis Kakas (eds). Nicosia, Cyprus, November 8-10, 2001. Revised Selected Papers http://link.springer.de/link/service/series/0558/tocs/t2563.htm Available: pdf file (213 Kb) George Flouris, Dimitris Plexousakis & Grigoris Antoniou Describing Knowledge Representation Schemes: a Formal Account, Technical Report FORTH-ICS/TR-320, April 2003. Available: pdf file (1.6 MB). George Flouris & Dimitris Plexousakis, Belief Revision in Propositional Knowledge Bases, 8th Panhellenic Conference on Informatics, Nicosia, Cyprus, 8-10 November 2001. Available: pdf file (324 KB). George Flouris: Belief Revision in Knowledge Bases Technical Report FORTH-ICS/TR-292, October 2001. Available in Greek: pdf file (3 MB). George Flouris & Dimitris Plexousakis, Belief Revision using Table Transformation, Technical Report FORTH-ICS/TR-290, July 2001. Available: pdf file (1.2 MB). Grigoris Karvounarakis G. Karvounarakis, A. Magkanaraki, S. Alexaki, V. Christophides, D. Plexousakis, M. Scholl, K. Tolle, RQL: A Functional Query Language for RDF, at The Functional Approach to Data Management: Modelling, Analyzing and Integrating Heterogeneous Data, P.M.D.Gray, L.Kerschberg, P.J.H.King, A.Poulovassilis (eds.), 2004 LNCS Series, Springer-Verlag, pp.435-465 Available: pdf file (536 KB) G. Karvounarakis, A. Magkanaraki, S. Alexaki, V. Christophides, D. Plexousakis, M. Scholl, K. Tolle, Querying the Semantic Web with RQL, at Computer Networks and ISDN Systems Journal, Vol. 42(5), August 2003, pp. 617-640. Elsevier Science Available: pdf file (491 KB) Aimilia Maganaraki G. Karvounarakis, A. Magkanaraki, S. Alexaki, V. Christophides, D. Plexousakis, M. Scholl, K. Tolle, RQL: A Functional Query Language for RDF, at The Functional Approach to Data Management: Modelling, Analyzing and Integrating Heterogeneous Data, P.M.D.Gray, L.Kerschberg, P.J.H.King, A.Poulovassilis (eds.), 2004 LNCS Series, Springer-Verlag, pp.435-465 Available: pdf file (536 KB) G. Karvounarakis, A. Magkanaraki, S. Alexaki, V. Christophides, D. Plexousakis, M. Scholl, K. Tolle, Querying the Semantic Web with RQL, at Computer Networks and ISDN Systems Journal, Vol. 42(5), August 2003, pp. 617-640. Elsevier Science Available: pdf file (491 KB) A. Magkanaraki, V. Tannen, V. Christophides and D. Plexousakis, Viewing the Semantic Web Through RVL Lenses, Proc of the Second International Semantic Web Conference (ISWC'03), (LNCS 2870), pp.96-112, Sanibel Island, Florida, USA, 20-23 October, 2003. Available: pdf file (399 KB) A. Magkanaraki, S. Alexaki, V. Christophides, and Dimitris Plexousakis, Benchmarking RDF Schemas for the Semantic Web, First International Semantic Web Conference (ISWC'02), Sardinia, Italy, June 9-12, 2002. Available: pdf file (590 KB) Nikos Papadakis Papadakis N., Plexousakis D., Addressing the Ramification Problem in a Temporal Context: the Case of Concurrent Actions, in Proceedings of the 15th IEEE International Conference on Tools with Artificial Intelligence ICTAI03, Sacramento, California, Nov. 3-5 (2003) Available: ps file (151 KB) Papadakis N., Plexousakis D., Actions with Duration and Constraints: the Ramification Problem in Temporal Databases, International Journal on Artificial Intelligence Tools, 12 (3): 315-353, Special Issue on Selected Papers from the 2002 IEEE International Conference on Tools with Artificial Intelligence (2003). Available: ps file (309 KB) Nikos Papadopoulos Nikos Papadopoulos & Dimitris Plexousakis, The Role of Semantic Relevance in Dynamic User Community Management and the Formulation of Recommendations, to appear in 14th International Conference on Advanced Information Systems Engineering, Toronto, 2002. Available: pdf file (180 KB). Nikos G. Papadopoulos: Development of a system that provides adaptive recommendation services, based on dynamic user-communities management Master of Science Thesis, Dept. of Computer Science, University of Crete, November 2001. Available in Greek: pdf file (2,231 MB) Manos Papagelis Papagelis E., Plexousakis D., "Recommendation-based Discovery of Dynamic Virtual Communities", in Proeedings of CAiSE Forum 2003, pp. 197-200, Klagenfurt/Velden, Austria, June 16-20 (2003). Available: pdf file (672 KB) Dimitris Plexousakis Giorgos Flouris, Dimitris Plexousakis, Grigoris Antoniou AGM Postulates in Arbitrary Logics: Initial Results and Applications. Technical Report FORTH-ICS/TR-336, April 2004. Available: pdf file (994 Kb). Giorgos Flouris, Dimitris Plexousakis, Grigoris Antoniou Generalizing the AGM Postulates: Preliminary Results and Applications To appear in Belief Change 04 Subworkshop of International Workshop on Non-Monotonic Reasoning 2004 (NMR-04), June 6-8, 2004, Westin Whistler Resort and Spa, Whistler BC, Canada. Available: pdf file (374 KB). G. Karvounarakis, A. Magkanaraki, S. Alexaki, V. Christophides, D. Plexousakis, M. Scholl, K. Tolle, RQL: A Functional Query Language for RDF, at The Functional Approach to Data Management: Modelling, Analyzing and Integrating Heterogeneous Data, P.M.D.Gray, L.Kerschberg, P.J.H.King, A.Poulovassilis (eds.), 2004 LNCS Series, Springer-Verlag, pp.435-465 Available: pdf file (536 KB) Papadakis N., Plexousakis D., Actions with Duration and Constraints: the Ramification Problem in Temporal Databases, International Journal on Artificial Intelligence Tools, 12 (3): 315-353, Special Issue on Selected Papers from the 2002 IEEE International Conference on Tools with Artificial Intelligence (2003). Available: ps file (309 KB) Flouris G., Plexousakis D., Antoniou G., On a Unifying Framework for Comparing Knowledge Representation Schemes, in Proceedings of the 10th International Workshop Knowledge Representation meets Databases (KRDB2003) Hamburg, Germany, Sept.15-16, (2003) Available: pdf file (134 KB) Papadakis N., Plexousakis D., Addressing the Ramification Problem in a Temporal Context: the Case of Concurrent Actions, in Proceedings of the 15th IEEE International Conference on Tools with Artificial Intelligence ICTAI03, Sacramento, California, Nov. 3-5 (2003) Available: ps file (151 KB) A. Magkanaraki, V. Tannen, V. Christophides and D. Plexousakis, Viewing the Semantic Web Through RVL Lenses, Proc of the Second International Semantic Web Conference (ISWC'03), (LNCS 2870), pp.96-112, Sanibel Island, Florida, USA, 20-23 October, 2003. Available: pdf file (399 KB) Flouris G., Plexousakis D., Antoniou G., "On a Unifying Framework for Comparing Knowledge Representation Schemes", in Proceedings of the 10th International Workshop Knowledge Representation meets Databases (KRDB2003) Hamburg, Germany, Sept.15-16, (2003) Available: pdf (134 KB) G. Karvounarakis, A. Magkanaraki, S. Alexaki, V. Christophides, D. Plexousakis, M. Scholl, K. Tolle, Querying the Semantic Web with RQL, at Computer Networks and ISDN Systems Journal, Vol. 42(5), August 2003, pp. 617-640. Elsevier Science Available: pdf file (491 KB) Katzagiannaki I., Plexousakis D., "Information Dissemination based on Semantic Relations", in Proceedings of CAiSE Forum 2003, pp. 245-248, Klagenfurt/Velden, Austria, June 16-20 (2003). Available: pdf file (171 KB) Papagelis E., Plexousakis D., "Recommendation-based Discovery of Dynamic Virtual Communities", in Proeedings of CAiSE Forum 2003, pp. 197-200, Klagenfurt/Velden, Austria, June 16-20 (2003). Available: pdf file (672 KB) V. Christophides, D. Plexousakis, M. Scholl, S. Tourtounis, On Labeling Schemes for the Semantic Web, Proc. of the 12th International World Wide Web Conference (WWW'03) pp. 544-555, Budapest, Hungary, May 20-24, 2003. Available: pdf file (265 KB) George Flouris, Dimitris Plexousakis & Grigoris Antoniou Describing Knowledge Representation Schemes: a Formal Account, Technical Report FORTH-ICS/TR-320, April 2003. Available: pdf file (1.6 MB). C. Houstis, S. Lalis, V.Christophides, D. Plexousakis, E. Vavalis, M. Pitikakis, K. Kritikos, A. Smardas, A Data, Computation and Knowledge Grid: the case of the ARION system, Proc. of the 5th International Conference on Enterprise Information Systems (ICEIS2003), pp.359-365, Angers, France, April 23-26 , 2003. Available: pdf file (276 KB) N. Papadakis & D. Plexousakis, The Ramification and Qualification Problems in Temporal Databases , Proceedings of the 2nd Hellenic Conference on Artificial Intelligence, Thessaloniki, Greece, April, 2002. Available: pdf file (184 KB), compressed ps file (60 KB). Nikos Papadakis & Dimitris Plexousakis, The Ramification Problem in Temporal Databases, submitted for publication, 2002. Available: pdf file (85 KB). S. Alexaki, N. Athanasis, V. Christophides, G. Karvounarakis, A. Maganaraki, D. Plexousakis & K. Tolle, The ICS-FORTH RDFSuite: High-level Scalable Tools for the Semantic Web, submitted for publication, 2002. Available: pdf file (85 KB). M. Koubarakis & D. Plexousakis, A Formal Framework for Business Process Modeling and Design, to appear in Information Systems, 2002. Available: pdf file (314 KB), compressed ps file (100 KB). Nikos Papadopoulos & Dimitris Plexousakis, The Role of Semantic Relevance in Dynamic User Community Management and the Formulation of Recommendations, to appear in 14th International Conference on Advanced Information Systems Engineering, Toronto, 2002. Available: pdf file (180 KB). A. Magkanaraki, S. Alexaki, V. Christophides, and Dimitris Plexousakis, Benchmarking RDF Schemas for the Semantic Web, First International Semantic Web Conference (ISWC'02), Sardinia, Italy, June 9-12, 2002. Available: pdf file (590 KB) G. Karvounarakis, S. Alexaki, V. Christophides, D. Plexousakis, Michel Scholl, RQL: A Declarative Query Language for RDF, The Eleventh International World Wide Web Conference (WWW'02), Honolulu, Hawaii, USA, May 7-11, 2002. Available: pdf file (308 Kb) G. Karvounarakis, V. Christophides & D. Plexousakis, RQL: A Declarative Query Language for RDF, D-Lib Magazine, Vol. 7, no. 12, December 2001. Available: pdf file (27 KB), compressed ps file (49 KB). George Flouris, Dimitris Plexousakis On the Use of Matrices for Belief Revision, IIn LNCS 2563, "Advances in Informatics 8th Panhellenic Conference in Informatics". Yannis Manolopoulos, Skevos Evripidou, Antonis Kakas (eds). Nicosia, Cyprus, November 8-10, 2001. Revised Selected Papers http://link.springer.de/link/service/series/0558/tocs/t2563.htm Available: pdf file (213 Kb) Sofia Alexaki, Vassilis Christophides, Greg Karvounarakis, Dimitris Plexousakis & Karsten Tolle, On Storing Voluminous RDF Description: The case of Web Portal Catalogs, Proc. of the 4th International Workshop on the Web and Databases (WebDB2001) in conjuction with ACM SIGMOD'01 Conference, Santa Barbara California USA, May 24-25, 2001. Available: pdf file (245 KB), compressed ps file (100 KB). George Flouris & Dimitris Plexousakis, Belief Revision in Propositional Knowledge Bases, 8th Panhellenic Conference on Informatics, Nicosia, Cyprus, 8-10 November 2001. Available: pdf file (324 KB), pdf file (213 KB). Nikos Papadakis & Dimitris Plexousakis, Action Theories in Temporal Databases, 8th Panhellenic Conference on Informatics, Nicosia, Cyprus, 8-10 November 2001. Available: pdf file (186 KB), pdf file (66 KB). George Flouris & Dimitris Plexousakis, Belief Revision using Table Transformation, Technical Report FORTH-ICS/TR-290, July 2001. Available: pdf file (1.2 MB). Martin Doerr, Dimitris Plexousakis & Chryssoula Bekiari, A Metamodel for Part-Whole Relationships for Reasoning on Missing Parts and Reconstruction, Proc. of ER-2001, Yokohama, Japan, 2001. Available: Available: pdf file (368 KB), compressed ps file (1,3 MB). Sofia Alexaki, Vassilis Christophides, Greg Karvounarakis, Dimitris Plexousakis & Karsten Tolle, The ICS-FORTH RDFSuite: Managing Voluminous RDF Description Bases, Proc. of the 2nd International Workshop on the Semantic Web (SemWeb'01) in conjuction with Tenth International World Wide Web Conference (WWW10), pp. 1-13, Hong-Kong, May 1st, 2001. Available: pdf file (547 KB), compressed ps file (234 KB). G. Karvounarakis, V. Christophides, D. Plexousakis, S. Alexaki, Querying RDF Descriptions for Community Web Portals, 17ièmes Journees Bases de Donnees Avancees (BDA'01), pp. 133-144, Agadir, Maroc, 29 Octobre - 2 Novembre, 2001. Available: pdf file (146 Kb) P. Constantopoulos, V. Christophides & D. Plexousakis, Semantic Web Workshop: Models, Architecture and Management Intelligence Magazine, 12(2), 2001 and SIGMOD Record, 30(3), 2001. Available: pdf file (89 KB), compressed ps file (155 KB). Vassilis Christophides, Dimitris Plexousakis, Gregory Karvounarakis & Sofia Alexaki, Declarative Languages for Querying Portal Catalogs, Proc. of the 1st "DELOS" Workshop on "Information Seeking, Searching and Querying in Digital Libraries", Zurich, Switzerland, December 11-12, 2000. Available: pdf file (171 KB). S. Alexaki, V. Christophides, G. Karvounarakis, D. Plexousakis, K. Tolle, B. Amann, I. Fundulaki, M. Scholl & A-M. Vercoustre, Managing RDF Metadata for Community Webs, Proc. of the 2nd International Workshop on The World Wide Web and Conceptual Modelling (WCM'2000) - ER Workshops, Salt Lake City, Utah US, October 2000, pp. 140-151. Available: pdf file (235 KB), compressed ps file (87 KB). Wes Cowley and Dimitrios Plexousakis, Temporal Integrity Constraints with Indeterminacy, Proc. of the 26th International Conference on Very Large Databases (VLDB 2000), Cairo, Egypt, September 2000. Available:pdf file (235 KB). Manolis Koubarakis & Dimitris Plexousakis, A Formal Model for Business Process Modeling and Design, Proceedings of CAISE'00, Stockholm, Sweden, pp. 142-157, June 2000. Available: pdf file (214 KB), compressed ps file (52 KB). Greg Karvounarakis, Vassilis Christophides & Dimitris Plexousakis, Querying Semistructured (Meta) Data and Schemas on the Web: The case of RDF & RDFS, Technical Report FORTH-ICS/TR-269, February 2000. Available: pdf file (397 KB), compressed ps file (155 KB). Wes Cowley and Dimitrios Plexousakis, An Interval Algebra for Indeterminate Time, Proc. of the AAAI-2000, pp.470-475, Austin, Texas, August 2000. Available: pdf file (85 KB), compressed ps file (39 KB). Manolis Koubarakis & Dimitris Plexousakis, Business Process Modelling and Design: A Formal Model and Methodology, British Telecom Technical Journal, Special Issue on "The Emerging Enterprise", Vol. 17, No. 4, pp. 23-35, October 1999. Available : pdf file (558 KB), compressed ps file (433 KB). Manolis Koubarakis & Dimitris Plexousakis, Business Process Modeling and Design: AI Models and Methodology, IJCAI-99 Workshop on Intelligent Workflow and Process Management: The New Frontier for AI in Business, pp. 98-109, Stockholm, Sweden, 1999. Available: pdf file (241 KB). Dimitris Plexousakis & John Mylopoulos, Accomodating Integrity Constraints During Database Design, Proc. of the International Conference on Extending Database Technologies (EDBT), Avignon, France, March 25 - 29, 1996. Available: pdf file (252 KB). John Mylopoulos, Vinay K. Chaudhri, Dimitris Plexousakis, Adel Shrufi & Thodoros Topaloglou, Building Knowledge Base Management Systems, The VLDB Journal, Volume 5, Number 4, December 1996, pp. 238-263. Dimitris Plexousakis: On the efficient maintenance of temporal integrity in knowledge bases. PhD thesis, Dept. of Computer Science, University of Toronto, 1996. Available: pdf file (1306 KB). Dimitris Plexousakis: Compilation and Simplification of Temporal Integrity Constraints. International Workshop on Rules in Database Systems (RIDS), Athens, Greece, September 25 - 27, 1995. Available: pdf file (239 KB). Dimitris Plexousakis: Simulation and Analysis of Business Processes Using GOLOG. In Proc. of the Conference on Organizational Computing Systems (COOCS'95), pp. 311-323, 1995. Available: pdf file (231 KB). J. Mylopoulos, V. Chaudhri, D. Plexousakis, A. Shrufi & T. Topaloglou, Building knowledge base management systems, The VLDB Journal, May 1995. Available: pdf file (503 KB). J. Mylopoulos, V. Chaudhri, D. Plexousakis, A. Shrufi & T. Topaloglou, Building knowledge base management systems: A progress report, Technical Report DKBS-TR-94-4, Dept. of Computer Science, University of Toronto, 1994. Available: pdf file (466 KB). J. Mylopoulos, V. Chaudhri, D. Plexousakis & T. Topaloglou, Adapting database implementation techniques to managing very large knowledge bases, In Proc. of the International Conference on Building and Sharing of Very Large-Scale Knowledge Bases '93, pages 215-224, Tokyo, Japan, December 1993. Available: pdf file (129 KB). Dimitris Plexousakis: Integrity Constraint and Rule Maintenance in Temporal Deductive Knowledge Bases. Proc. of the 19th International Conference on Very Large Data Bases (VLDB), pages 146-157, August 1993. Available: pdf file (284 KB). Nikolas Spyratos Y. Tzitzikas, A. Analyti, and N. Spyratos, The Semantics of the Compound Term Composition Algebra, International Conference on Ontologies, DataBases, and Applications of Semantics for Large Scale Information Systems (ODBASE 2003), LNCS 2888, November 2003, pp. 970-985 Available: pdf file (163 Kb) Y. Tzitzikas, A. Analyti, N. Spyratos and P. Constantopoulos, An Algebraic Approach for Specifying Compound Terms in Faceted Taxonomies, Proceedings of the 13th European-Japanese Conference on Information Modelling and Knowledge Bases, EJC2003, Kitakyushu, Japan, June 2003. In book: Information Modelling and knowledge Bases XV, IOS Press, 2004, pp. 67-87 Available: pdf file (214 Kb) Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, A Theory of Context in Information Bases, In Information Systems, 27(3), pp. 151-191, 2002 Available: pdf file (549 KB), compressed ps file (168 KB). Y. Tzitzikas, N. Spyratos, P. Constantopoulos and A. Analyti, "Extended Faceted Taxonomies for Web Catalogs", Third International Conference on Web Information Systems Engineering, WISE 2002, Singapore, 12-14 December, 2002, pp. 192-204 Available: pdf file (141 KB) Y. Tzitzikas, N. Spyratos and P. Constantopoulos, "Deriving Valid Expressions from Ontology Definitions", Proceedings of the 11th European-Japanese Conference on Information Modelling and Knowledge Bases, Maribor, Slovenia, 29 May-1 June, 2001. In Information Modelling and Knowledge Bases XIII, Kangassalo H., Welzer T., Jaakkola H., Rozman I., Kawaguchi E. (editors), IOS Press, Amsterdam, 2002. Available: Compressed ps.gz file (238 KB) N. Spyratos, Y. Tzitzikas, V. Christophides, On Personalizing the Catalogs of Web Portals, Special Track on Semantic Web at the 15th International FLAIRS'02 Conference, Florida, May 14-16, 2002. Available: pdf file (78 KB) Yannis Tzitzikas, Nicolas Spyratos, Panos Constantopoulos and Anastasia Analyti, "Extended Faceted Ontologies", (short paper), Fourteenth International Conference on Advanced Information Systems Engineering, CAiSE-2002, Toronto, Canada, May 11-12, 2002. Available: compressed ps.gz file (57 KB) Yannis Tzitzikas, Nicolas Spyratos and Panos Constantopoulos, "Query Evaluation for Mediators over Web Catalogs", Proceedings of 27th International Conference on Information and Communication Technologies and Programming, ICT&P 2002, Primorsko, Bulgaria, June 24-29, 2002. Aslo published in International Journal of Information Theories and Applications, 9(2), 2002. Available: compressed ps.gz file (73 KB) Yannis Tzitzikas, Nicolas Spyratos and Panos Constantopoulos, "Query Translation for Mediators over Ontology-based Information Sources", Second Hellenic Conference on Artificial Intelligence, SENT-2002, Thessaloniki, Greece, April 11-12, 2002. Available: compressed ps.gz file (104 KB) Yannis Tzitzikas, Nicolas Spyratos and Panos Constantopoulos, Mediators over Ontology-based Information Sources, Second International Conference on Web Information Systems Engineering, WISE 2001, Kyoto, Japan, Dec 3-6, 2001. Available: pdf file (161 KB), compressed ps file (78 KB). Yannis Tzitzikas, Nicolas Spyratos & Panos Constantopoulos, Deriving Valid Expressions from Ontology Definitions, Proc. of the 11th European-Japanese Conference on Information Modelling and Knowledge Bases, Maribor, Slovenia, May 29 - June 1, 2001. Available: pdf file (255 KB), compressed ps file (238 KB) Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos, Deriving and Retrieving Contextual Categorical Information through Instance Inheritance, Fundamenta Informaticae 44 (2000), pp. 1-31, IOS Press. Available: pdf file (434 KB), compressed ps file (164 KB). Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, Contextualization as an Abstraction Mechanism for Conceptual Modelling, Proc. of the 18th Intern. Conference on Conceptual Modelling (ER '99), Paris, November 15-18, 1999, pp. 475-489. Available: pdf file (105 KB),compressed ps file (55 KB). Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, Querying Contextualized Information Bases, Proc. of the 24th Intern. Conference on Information and Communication Technologies and Programming (ICT&P ' 99), Plovdiv, Bulgaria, June 8-12, 1999. Available: pdf file (175 KB), compressed ps file (77 KB). Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, Contextualization as an Abstraction Mechanism for Conceptual Modelling, Technical Report FORTH-ICS/TR-255, April 1999. Available: compressed ps file (73 KB), pdf file (137 KB). Anastasia Analyti, Nicolas Spyratos, Panos Constantopoulos & Martin Doerr, Inheritance under Participation Constraints and Disjointness, Information Modeling and Knowledge Bases X,: H. Jaakkola, H. Kangassalo, E. Kawaguchi (eds.), 1999. Available: pdf file (265 KB), compressed ps file (79 KB). Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nikolas Spyratos, Context in Information Bases, Proc. of the 3rd IFCIS International Conference on Cooperative Information Systems (CoopIS ' 98), New York, USA, August 20-22, 1998, pp. 260-270. Available: abstract - html file (3 KB), pdf file (171 KB), compressed ps file (82 KB). Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos, Deriving and Retrieving Contextual Categorical Information through Instance Inheritance, Technical Report FORTH-ICS/TR-220, May 1998. Available: compressed ps file (129 KB) Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nikolas Spyratos, A Theory of Contexts in Information Bases, Technical Report FORTH-ICS/TR-216, March 1998. Available: pdf file (500 KB), compressed ps file (294 KB). Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos, On the Semantics of a Semantic Network, Fundamenta Informaticae 36 (1998), pp. 109-144, IOS Press. Available: pdf file (382 KB), compressed ps file (115 KB). Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos, Deriving Semantic Information through Property Covering and Inheritance, Data and Knowledge Engineering, 28, No. 1, 30, pp. 3-30, 1998. Available: pdf file (345 KB), compressed ps file (105 KB). Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, Specialization by Restriction and Schema Derivations, Information Systems, Vol. 23, No. 1, pp. 1-38, 1998. Available: pdf file (455 KB), compressed ps file (170 KB) Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, Deriving and retrieving Contextual Categorical Information through Instance Inheritance, Fundamenta Informaticae, Vol. 33, pp. 1-37, 1998. Available: pdf file (405 KB), compressed ps file (143 KB) Anastasia Analyti, Nicolas Spyratos, Panos Constantopoulos & Martin Doerr, Inheritance under Participation Constraints and Disjointness, Proc. of the 8th European-Japanese Conference on Information Modelling and Knowledge Bases, pp. 269-287, 1998. Available: pdf file (265 KB), compressed ps file (79 KB). Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos, Property Covering: A Powerfull Construct for Schema Derivations, Proc. of the 16th. International Conference on Conceptual Modeling (ER' 97), pp. 271-284, November 1997. Available: pdf file (201 KB), compressed ps file (55 KB) Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos, Property Covering: A Powerful Construct for Schema Derivations, Technical Report FORTH-ICS/TR-199, 28 pages, June 1997. Available: compressed ps file (91 KB). Anastasia Analyti, Nicolas Spyratos, Panos Constantopoulos & Martin Doerr, Inheritance under Participation Constraints and Disjointness, Technical Report FORTH-ICS/TR-198, 28 pages, June 1997. Available: compressed ps file (81 KB). Anastasia Analyti, Nicolas Spyratos & Panos Constantopoulos, On the Definition of Semantic Network Semantics, Technical Report FORTH-ICS/TR-187, 45 pages, February 1997. Available: pdf file (383 KB), compressed ps file (117 KB). Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, Specialization by Restriction and Schema Derivations. Technical Report FORTH-ICS/TR-176, 56 pages, October 1996. Available: compressed ps file (133.2 KB). Manos Theodorakis Manos Theodorakis: Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, A Theory of Context in Information Bases, In Information Systems, 27(3), pp. 151-191, 2002 Available: pdf file (549 KB), compressed ps file (168 KB). Contextualization: An Abstraction Mechanism for Information Modeling, Doctoral Dissertation, Department of Computer Science, University of Crete, June 2001. Available: pdf file (1 MB). Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, Contextualization as an Abstraction Mechanism for Conceptual Modelling, Proc. of the 18th Intern. Conference on Conceptual Modelling (ER '99), Paris, November 15-18, 1999, pp. 475-489. Available: pdf file (105 KB),compressed ps file (55 KB). Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, Querying Contextualized Information Bases, Proc. of the 24th Intern. Conference on Information and Communication Technologies and Programming (ICT&P ' 99), Plovdiv, Bulgaria, June 8-12, 1999. Available: pdf file (175 KB), compressed ps file (77 KB). Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nicolas Spyratos, Contextualization as an Abstraction Mechanism for Conceptual Modelling, Technical Report FORTH-ICS/TR-255, April 1999. Available: compressed ps file (73 KB), pdf file (137 KB). Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nikolas Spyratos, Context in Information Bases, Proc. of the 3rd IFCIS International Conference on Cooperative Information Systems (CoopIS ' 98), New York, USA, August 20-22, 1998, pp. 260-270. Available: abstract - html file (3 KB), pdf file (171 KB), compressed ps file (82 KB). Manos Theodorakis, Anastasia Analyti, Panos Constantopoulos & Nikolas Spyratos, A Theory of Contexts in Information Bases, Technical Report FORTH-ICS/TR-216, March 1998. Available: pdf file (500 KB), compressed ps file (294 KB). Manos Theodorakis & Panos Constantopoulos, Context-Based Naming in Information Bases, International Journal of Cooperative Information Systems, Vol. 6, Nos. 3 & 4 (1997), pp. 269-292. Available: abstract - html file (3 KB), html file (75 KB), pdf file (284 KB), compressed ps file (87 KB). Manos Theodorakis & Panos Constantopoulos, On Context-based Naming in Information Bases, Proc. of the 2nd IFCIS International Conference on Cooperative Information Systems (CoopIS ' 97), Charleston, South Carolina, USA, June 24-27, 1997, pp. 140-149. Available: abstract - html file (3 KB), html file (67 KB), compressed ps file (60.3 KB). Manos Theodorakis: Context-based Naming in Semantic Networks, Proc. of the 3rd Doctoral Consortium on Advanced Information Systems Engineering (CAiSE'96), May 20-21, 1996, pp. 53-56. Available: pdf file (113 KB), compressed ps file (32 KB). Panos Constantopoulos, Manos Theodorakis & Yannis Tzitzikas, Developing Hypermedia Over an Information Repository, Proc. of the 2nd WorkShop on Open Hypermedia Systems (OHS) on Hypertext' 96 (HT ' 96), Washington, DC, USA, March 16-17, 1996. Available: pdf file (63 KB), compressed ps file (144 KB). Manos Theodorakis: Name Scope In Semantic Data Models. Technical Report FORTH-ICS/TR-141, October 1995. Available in Greek: abstract - html file (4 KB), compressed ps file (446 KB). Manos Theodorakis & Yannis Tzitzikas, DOMENICUS: Art and Digital Technology. Educational Journal, Pataki edition, December 1993 (in Greek). Maria Theodoridou Panos Constantopoulos, Martin Doerr, Maria Theodoridou, Manolis Tzobanakis "Historical documents as monuments and as sources", Computer Applications and Quantitative Methods in Archaeology Conference, CAA2002, 2-6 April, 2002, Heraklion, Greece. Available: pdf file (307 KB). Maria Theodoridou & Martin Doerr, Mapping of the Encoded Archival Description DTD Element Set to the CIDOC CRM, Technical Report FORTH-ICS/TR-289, June 2001. Available: pdf file (226 KB). Maria Theodoridou & Martin Doerr, Classifying Historical Documents, Proc. of the Intern. Conference on Applications of Information Technologies to Biblical Studies, OSI-HESP SUMMER SCHOOL, Sofia, Bulgaria, July 27 - August 7, 1998. Available: html file (11 KB), compressed ps file (72 KB). Panos Constantopoulos, Maria Theodoridou & Y. Yeorgaroudakis, Flexible Query Formulation for Multimedia Document Retrieval, Proc. of the Conference on Information Technology for Organisational Systems, Athens, Greece, 1988. Panos Constantopoulos, G.Drettakis, E.Petra, Maria Theodoridou & Y.Yeorgaroudakis, Iterative Design of User Interfaces for an Office System Using a UIMS, Proc. of the Conference on Information Technology for Organisational Systems, Athens, Greece, 1988. Panos Constantopoulos, G.Drettakis, E.Petra, Maria Theodoridou & Y. Yeorgaroudakis, Multimedia Office System Interface Design Using a UIMS, Proc. of the IFIP WG 8.4 Working Conference "Office Information Systems: The Design Process", Linz, Austria, 1988. Sotiris Tourtounis V. Christophides, D. Plexousakis, M. Scholl, S. Tourtounis, On Labeling Schemes for the Semantic Web, Proc. of the 12th International World Wide Web Conference (WWW'03) pp. 544-555, Budapest, Hungary, May 20-24, 2003. Available: pdf file (265 KB) Yannis Tzitzikas Y. Tzitzikas, A. Analyti, and N. Spyratos, The Semantics of the Compound Term Composition Algebra, International Conference on Ontologies, DataBases, and Applications of Semantics for Large Scale Information Systems (ODBASE 2003), LNCS 2888, November 2003, pp. 970-985 Available: pdf file (163 Kb) Y.Tzitzikas, Collaborative Ontology-based Information Indexing and retrieval. Doctoral Dissertation, Heraklion June 2002. Available:pdf file (1.14 Mb) Y. Tzitzikas, A. Analyti, N. Spyratos and P. Constantopoulos, An Algebraic Approach for Specifying Compound Terms in Faceted Taxonomies, Proceedings of the 13th European-Japanese Conference on Information Modelling and Knowledge Bases, EJC2003, Kitakyushu, Japan, June 2003. In book: Information Modelling and knowledge Bases XV, IOS Press, 2004, pp. 67-87 Available: pdf file (214 Kb) Y. Tzitzikas, N. Spyratos, P. Constantopoulos and A. Analyti, "Extended Faceted Taxonomies for Web Catalogs", Third International Conference on Web Information Systems Engineering, WISE 2002, Singapore, 12-14 December, 2002, pp. 192-204 Available: pdf file (141 KB) Y. Tzitzikas, N. Spyratos and P. Constantopoulos, "Deriving Valid Expressions from Ontology Definitions", Proceedings of the 11th European-Japanese Conference on Information Modelling and Knowledge Bases, Maribor, Slovenia, 29 May-1 June, 2001. In Information Modelling and Knowledge Bases XIII, Kangassalo H., Welzer T., Jaakkola H., Rozman I., Kawaguchi E. (editors), IOS Press, Amsterdam, 2002. Available: Compressed ps.gz file (238 KB) Yannis Tzitzikas, Nicolas Spyratos, Panos Constantopoulos and Anastasia Analyti, "Extended Faceted Ontologies", (short paper), Fourteenth International Conference on Advanced Information Systems Engineering, CAiSE-2002, Toronto, Canada, May 11-12, 2002. Available: compressed ps.gz file (57 KB) Yannis Tzitzikas, Nicolas Spyratos and Panos Constantopoulos, "Query Evaluation for Mediators over Web Catalogs", Proceedings of 27th International Conference on Information and Communication Technologies and Programming, ICT&P 2002, Primorsko, Bulgaria, June 24-29, 2002. Aslo published in International Journal of Information Theories and Applications, 9(2), 2002. Available: compressed ps.gz file (73 KB) N. Spyratos, Y. Tzitzikas, V. Christophides, On Personalizing the Catalogs of Web Portals, Special Track on Semantic Web at the 15th International FLAIRS'02 Conference, Florida, May 14-16, 2002. Available: pdf file (78 KB) Yannis Tzitzikas, Nicolas Spyratos and Panos Constantopoulos, "Query Translation for Mediators over Ontology-based Information Sources", Second Hellenic Conference on Artificial Intelligence, SENT-2002, Thessaloniki, Greece, April 11-12, 2002. Available: compressed ps.gz file (104 KB) Yannis Tzitzikas, Nicolas Spyratos and Panos Constantopoulos, Mediators over Ontology-based Information Sources, Second International Conference on Web Information Systems Engineering, WISE 2001, Kyoto, Japan, Dec 3-6, 2001. Available: pdf file (161 KB), compressed ps file (78 KB). Yannis Tzitzikas: Democratic Data Fusion for Information Retrieval Mediators. Proc. of the ACS/IEEE International Conference on Computer Systems and Applications, Beirut, Lebanon, June 26-29, 2001. Available: pdf file (115 KB), compressed ps file (142 KB). Yannis Tzitzikas, Nicolas Spyratos & Panos Constantopoulos, Deriving Valid Expressions from Ontology Definitions, Proc. of the 11th European-Japanese Conference on Information Modelling and Knowledge Bases, Maribor, Slovenia, May 29 - June 1, 2001. Available: pdf file (255 KB), compressed ps file (238 KB) Yannis Tzitzikas & Panos Constantopoulos, A Decision-theoretic Model for Information Retrieval Supporting Time Constraints, Proc. of the BCS-IRSG European Colloquium on IR Research, Darmstadt, Germany, April 4-6, 2001. Available: pdf file (122 KB),compressed ps file (116 KB) Panos Constantopoulos & Yannis Tzitzikas, Context-Driven Information Base Update, Proc. of the 8th International Conference, CAiSE'96, pp. 319-344, Heraklion, Crete, Greece, May 20-24, 1996. Available: pdf file (233 KB), compressed ps file (243 KB). Yannis Tzitzikas: Exploiting Semantic Networks to Generate Hypermedia. 3rd Doctoral Consortium on Advanced Information Systems Engineering, Heraklion, Crete, Greece, May 20-21, 1996. Available: pdf file (105 KB), compressed ps file (25 KB). Panos Constantopoulos, Manos Theodorakis & Yannis Tzitzikas, Developing Hypermedia Over an Information Repository, Proc. of the 2nd WorkShop on Open Hypermedia Systems (OHS) on Hypertext' 96 (HT ' 96), Washington, DC, USA, March 16-17, 1996. Available: pdf file (63 KB), compressed ps file (144 KB). Yannis Tzitzikas: View Updates in Knowledge Bases. Technical Report FORTH-ICS/TR-142, October 1995. Available: compressed ps file (627 KB). Manos Theodorakis & Yannis Tzitzikas, DOMENICUS: Art and Digital Technology. Educational Journal, Pataki edition, December 1993 (in Greek).

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