Publications


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Book Chapters

  1. Query Processing in RDF/S-based P2P Database Systems G. Kokkinidis, L. Sidirourgos, V. Christophides, at Semantic Web and Peer-to-Peer, S. Staab, H. Stuckenschmidt (eds.), Springer-Verlag, 2006.
    (pdf)
  2. RQL: A Functional Query Language for RDF, G. Karvounarakis, A. Magkanaraki, S. Alexaki, V. Christophides, D. Plexousakis, M. Scholl, K. Tolle, 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.), LNCS Series, Springer-Verlag, 2004.
    (pdf)

Journals

  1. Emergent Knowledge Artifacts for Supporting Trialogical E-Learning, Y. Tzitzikas, V. Christophides, G. Flouris, D. Kotzinos, H. Markkanen, D. Plexousakis, N. Spyratos, at International Journal of Web-based Learning and Teaching Technologies, Vol. 2, Issue 3, pp. 19-41 pages
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  2. Indexing views to route queries in a PDMS, Lefteris Sidirourgos, George Kokkinidis, Theodore Dalamagas, Vassilis Christophides and Timos Sellis, at Journal of Distributed and Parallel Databases, Vol. 23(1), pp. 45-68, Febrouary 2008
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  3. On Ranking RDF Schema Elements (and its Application in Visualization), Y. Tzitzikas, D. Kotzinos and Y. Theoharis, at Journal of Universal Computer Science (JUCS), Special Issue: Ontologies and Their Applications, Vol. 13(12), pp. 1854-1880, December 2007
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  4. On Graph Features of Semantic Web Schemas, Y. Theoharis, Y. Tzitzikas, D. Kotzinos and V. Christophides, at IEEE Transactions on Knowledge and Data Engineering, Vol. 20, No. 5, pp. 692-702, May 2008,
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  5. Mediating RDF/S Queries to Relational and XML Sources, I. Koffina, G. Serfiotis, V. Christophides and V. Tannen, at International Journal on Semantic Web & Information Systems (IJSWIS), Vol. 2(4), pp 68-91, October - December 2006
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  6. Viewing the Semantic Web Through RVL Lenses, A. Magkanaraki, V. Tannen, V. Christophides and D. Plexousakis, at Web Semantics: Science, Services and Agents on the World Wide Web, Vol. 1(4), 2004, pp. 359-375
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  7. Optimizing Taxonomic Semantic Web Queries Using Labeling Schemes, V. Christophides, G. Karvounarakis, D. Plexousakis, Michel Scholl and S. Tourtounis, at Web Semantics: Science, Services and Agents on the World Wide Web, Vol. 1(2), 2004, pp. 207-228 
    (pdf) (html)
  8. Querying the Semantic Web with RQL, G. Karvounarakis, A. Magkanaraki, S. Alexaki, V. Christophides, D. Plexousakis, M. Scholl, K. Tolle, at Computer Networks and ISDN Systems Journal, Vol. 42(5), August 2003, pp. 617-640. Elsevier Science
    (pdf)

Invited Talks

  1. Integrating XML Data Sources using RDF/S Schemas: The ICS-FORTH Semantic Web Integration Middleware (SWIM), V. Christophides, I. Koffina, G. Serfiotis, V. Tannen, A. Deutsch Dagstuhl Seminar (2004): Semantic Interoperability and Integration
    (pdf)
  2. From Semistructured/XML Data to the Semantic Web, V. Christophides Third Hellenic Data Management Symposium (HDMS'04)
    (pdf)
  3. The Semantic Web: Myths and Reality, V. Christophides, D. Plexousakis, M. Scholl, V. Tannen The Onassis Foundation Lectures Series in Computer Science (2003): Internet and Web: Crawling the Algorithmic Foundations
    (pdf)

Conference Proceedings

  1. On Detecting High-Level Changes in RDF/S KBs, Vicky Papavassiliou, Giorgos Flouris, Irini Fundulaki, Dimitris Kotzinos and Vassilis Christophides 8th International Semantic Web Conference, ISWC 2009, Washington, DC, USA, October 2009.
    (pdf) (presentation slides)
  2. Coloring RDF Triples to Capture Provenance, Giorgos Flouris, Irini Fundulaki, Panagiotis Pediaditis, Yannis Theoharis and Vassilis Christophides 8th International Semantic Web Conference, ISWC 2009, Washington, DC, USA, October 2009.
    (pdf) (presentation slides)
  3. A Formal Approach for RDF/S Ontology Evolution, G. Konstantinidis, G. Flouris, G. Antoniou and Vassilis Christophides 18th European Conference on Artificial Intelligence, ECAI'2008, Patras, Greece, July 2008.
    (pdf)
  4. On Storage Policies for Semantic Web Repositories that Support Versioning, Y. Tzitzikas, Y. Theoharis and D. Andreou, Fifth European Semantic Web Conference (ESWC'2008), Tenerife, Spain, June 2008.
    (pdf)
  5. On the Foundations of Computing Deltas Between RDF Models, D. Zeginis, Y. Tzitzikas and V. Christophides, Sixth International Semantic Web Conference (ISWC'07), Busan, Korea, November, 2007. (BEST PAPER AWARD)
    (pdf) (presentation slides)
  6. Benchmarking Database Representations of RDF/S Stores, Y. Theoharis, V. Christophides and G. Karvounarakis, Fourth International Semantic Web Conference (ISWC'05), Galway, Ireland, November, 2005.
    (pdf) (presentation slides)
  7. RUL: A Declarative Update Language for RDF, M. Magiridou, S. Sahtouris, V. Christophides and M. Koubarakis, Fourth International Semantic Web Conference (ISWC'05), Galway, Ireland, November, 2005.
    (pdf) (presentation slides)
  8. Containment and Minimization of RDF/S Query Patterns, G. Serfiotis, I. Koffina, V. Christophides and V. Tannen, Fourth International Semantic Web Conference (ISWC'05), Galway, Ireland, November, 2005.
    (pdf) (presentation slides)
  9. Online Curriculum on the Semantic Web: The CSD-UoC Portal for Peer-to-peer e-learning, D. Kotzinos, S. Pediaditaki, A. Apostolidis, N. Athanasis and V. Christophides, 14th International World Wide Web Conference (WWW'05), Chiba, Japan, May 10-14, 2005.
    (pdf) (presentation slides)
  10. Generating On the Fly Queries for the Semantic Web: The ICS-FORTH Graphical RQL Interface (GRQL), N. Athanasis, V. Christophides and D. Kotzinos, Third International Semantic Web Conference (ISWC'04), Hiroshima, Japan, November, 2004.
    (pdf) (presentation slides)
  11. Personalisation Services for Self e-Learning Networks, K. Keenoy, A. Poulovassilis, V. Christophides, P. Rigaux, G. Papamarkos, A. Magkanaraki, M. Stratakis, N. Spyratos and P. Wood, Fourth International Conference on Web Engineering (ICWE'04), Munich, July, 2004. 
    (pdf)
  12. Semantic Query Routing and Processing in P2P Database Systems: The ICS-FORTH SQPeer Middleware, G. Kokkinidis and V. Christophides, Third Hellenic Data Management Symposium (HDMS'04), Athens, Greece, June 28-29, 2004. 
    (ps) (pdf) (presentation slides)
  13. Viewing the Semantic Web Through RVL Lenses, A. Magkanaraki, V. Tannen, V. Christophides and D. Plexousakis, Second International Semantic Web Conference (ISWC'03), Sanibel Island, Florida, USA, 20-23 October, 2003. (BEST PAPER AWARD)
    (pdf) (ps) (presentation slides)
  14. On Labeling Schemes for the Semantic Web, V. Christophides, D. Plexousakis, M. Scholl, S. Tourtounis, 12th International World Wide Web Conference (WWW'03), Budapest, Hungary, May 20-24, 2003.
    (pdf) (html) (presentation slides)
  15. A Data, Computation and Knowledge Grid: the case of the ARION system, C. Houstis, S. Lalis, V.Christophides, D. Plexousakis, E. Vavalis, M. Pitikakis, K. Kritikos, A. Smardas, 5th International Conference on Enterprise Information Systems (ICEIS2003), Angers, France, April 23-26 , 2003.
    (pdf)
  16. Benchmarking RDF Schemas for the Semantic Web, A. Magkanaraki, S. Alexaki, V. Christophides, and Dimitris Plexousakis, First International Semantic Web Conference (ISWC'02), Sardinia, Italy, June 9-12, 2002.
    (pdf) (presentation slides)
  17. On Personalizing the Catalogs of Web Portals, N. Spyratos, Y. Tzitzikas, V. Christophides, Special Track on Semantic Web at the 15th International FLAIRS'02 Conference, Florida, May 14-16, 2002.
    (pdf)
  18. RQL: A Declarative Query Language for RDF, G. Karvounarakis, S. Alexaki, V. Christophides, D. Plexousakis, Michel Scholl, The Eleventh International World Wide Web Conference (WWW'02), Honolulu, Hawaii, USA, May 7-11, 2002.
    (html) (ps) (pdf) (presentation slides)
  19. Querying RDF Descriptions for Community Web Portals, G. Karvounarakis, V. Christophides, D. Plexousakis, S. Alexaki, 17ièmes Journees Bases de Donnees Avancees (BDA'01), pp. 133-144, Agadir, Maroc, 29 Octobre - 2 Novembre, 2001.
    (ps) (pdf) (presentation slides)

Workshop Proceedings

  1. Ontology Evolution: A Framework and its Application to RDF, G. Konstantinidis, G. Flouris, G. Antoniou and V. Christophides Joint ODBIS & SWDB workshop on Semantic Web, Ontologies, Databases. Colocated with VLDB2007, Vienna, Austria, September 2007.
    (pdf)
  2. On the Synthetic Generation of Semantic Web Schemas, Y. Theoharis, G. Georgakopoulos and V. Christophides. Joint ODBIS & SWDB workshop on Semantic Web, Ontologies, Databases. Colocated with VLDB2007, Vienna, Austria, September 2007.
    (pdf)
  3. Emergent Knowledge Artifacts for Supporting Trialogical E-Learning, Y. Tzitzikas, V. Christophides, G. Flouris, D. Kotzinos, H. Markkanen, D. Plexousakis, N. Spyratos, 1st International Workshop on Building Technology Enhanced Learning solutions for Communities of Practice (TEL-CoPs'06), in conjunction with EC-TEL'06
    (pdf) (presentation slides)
  4. Querying with Preferences in a Digital Library, N. Spyratos and V. Christophides, Dagstuhl Seminar (N 05182) Federation over the Web, May 2005.
    (pdf)
  5. Adaptive Personalisation in Self e-Learning Networks, K. Keenoy and A. Poulovassilis and G. Papamarkos and P. T. Wood and V. Christophides and A. Magkanaraki and M. Stratakis and P. Rigaux and N. Spyratos, First International Kaleidoscope Learning Grid SIG Workshop on Distributed e-Learning Environments, Napoli, Italy, March 14, 2005.
    (pdf) (presentation slides)
  6. Semantic Query Routing and Processing in P2P Database Systems: The ICS-FORTH SQPeer Middleware, G. Kokkinidis and V. Christophides, First International Workshop on Peer-to-Peer Computing and Databases (P2P&DB'04), Co-located with EDBT 2004, Herakleion, Crete, Greece, March 14, 2004. 
    (html) (ps) (pdf) (presentation slides)
  7. The ICS-FORTH SWIM: A Powerful Semantic Web Integration Middleware, V. Christophides, G. Karvounarakis, I. Koffina, G. Kokkinidis, A. Magkanaraki, D. Plexousakis, G. Serfiotis, and V. Tannen, First International Workshop on Semantic Web and Databases, Co-located with VLDB 2003, Humboldt-Universitat, Berlin, Germany, September 7-8, 2003.
    (pdf)
  8. A Service Infrastructure for E-Science: the case of the ARION System, Catherine Houstis, Spyros Lalis, Vassilis Christophides, Dimitris Plexousakis, Manolis Vavalis, Marios Pitikakis, Kyriakos Kritikos, Antonis Smardas, Charalampos Gikas, Workshop on "Web Services, e-Business, and the Semantic Web: Foundations, Models, Architecture, Engineering and Applications" In conjunction with CAiSE'02, Toronto, Ontario, Canada, May 27-28, 2002.
    (pdf) (presentation slides)
  9. On Storing Voluminous RDF Descriptions: The case of Web Portal Catalogs, S. Alexaki, V. Christophides, G. Karvounarakis, D. Plexousakis, 4th International Workshop on the the Web and Databases (WebDB'01) - in conjunction with ACM SIGMOD/PODS, Santa Barbara, CA, May 24-25, 2001.
    (ps) (pdf) (presentation slides)
  10. The ICS-FORTH RDFSuite: Managing Voluminous RDF Description Bases, S. Alexaki, V. Christophides, G. Karvounarakis, D. Plexousakis, K. Tolle, 2nd International Workshop on the Semantic Web (SemWeb'01), in conjunction with Tenth International World Wide Web Conference (WWW10), pp. 1-13, Hongkong, May 1, 2001.
    (html) (ps) (pdf) (presentation slides)
  11. Declarative Languages for Querying Portal Catalogs, V. Christophides, D. Plexousakis, G. Karvounarakis, S. Alexaki, DELOS Workshop: Information Seeking, Searching and Querying in Digital Libraries, pp. 115-120, Zurich, Switzerland, December 11-12, 2000.
    (ps) (pdf) (presentation slides)
  12. Managing RDF Metadata for Community Webs, S. Alexaki, V. Christophides, G. Karvounarakis, D. Plexousakis, K. Tolle, Bernd Amann, Irini Fundulaki, Michel Scholl, Anne-Marie Vercoustre, 2nd International Workshop on the World Wide Web and Conceptual Modeling (WCM'00) in conjunction with The 19th International Conference on Conceptual Modeling (ER'00), pp. 140-151, Salt Lake City, Utah, October 9-12, 2000.
    (ps) (pdf) (presentation slides)

Posters/Demos

  1. Trialogical E-Learning and Emergent Knowledge Artifacts, Y. Tzitzikas, V. Christophides, G. Flouris, D. Kotzinos, H. Markkanen, D. Plexousakis, N. Spyratos, 1st European Conference on Technology Enhanced Learning (EC-TEL'06)
    (pdf) (ppt)
  2. P2P Digital Libraries, G. Kokkinidis, L. Sidirourgos, V. Christophides, T. Dalamagas, T. Sellis, and S. Viglas, Poster Session of the 9th European Conference on Research and Advanced Technology for Digital Libraries, Vienna, Austria, September 18-23, 2005.
    (pdf)
  3. The ICS-FORTH RDFSuite: High-level Scalable Tools for the Semantic Web, S. Alexaki, N. Athanasi, V. Christophides, G. Karvounarakis, A. Magkanaraki, D. Plexousakis, and K. Tolle, Poster Session of the Eleventh International World Wide Web Conference (WWW'02), Honolulu, Hawaii, USA, May 8, 2002.
    (pdf)

Magazines/Bulletins

  1. The ICS-FORTH Semantic Web Integration Middleware (SWIM), V. Christophides, G. Karvounarakis, A. Magkanaraki, D. Plexousakis, V. Tannen, IEEE Data Engineering Bulletin 26(4): 11-18 2003.
    (ps) (pdf)
  2. The ICS-FORTH RDFSuite: High-level Scalable Tools for the Semantic Web, S. Alexaki, N. Athanasis, V. Christophides, G. Karvounarakis, A. Magkanaraki, D. Plexousakis and K. Tolle ERCIM News, No. 51, October 2002.
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  3. RQL: A Declarative Query Language for RDF, G. Karvounarakis, V. Christophides, D. Plexousakis, D-Lib Magazine, 7(12), December 2001.
    (pdf)

Technical Reports

  1. Ontology Storage and Querying, A. Magkanaraki, G. Karvounarakis, V. Christophides, D. Plexousakis, T. Anh, Technical Report No 308, April 2002.
    (pdf)

Master's Theses

  1. Querying and Updating RDF/S Named Graphs, Panagiotis Pediaditis, Master's Thesis, Univ. of Crete (2008)
    (pdf)
  2. On Computing Deltas of RDF/S Knowledge Bases, Dimitris Zeginis, Master's Thesis, Univ. of Crete (2008)
    (pdf)
  3. Belief Change in Semantic Web Environments, George Konstantinidis, Master's Thesis, Univ. of Crete (2008)
    (pdf)
  4. Semantic Web Middlewares and Versioning Services, Dimitris Andreou, Master's Thesis, Univ. of Crete (2007)
    (pdf)
  5. Query Ordering Based top-k Algorithms for Qualitatively Specified Preferences, Ioannis Kapantaidakis, Master's Thesis, Univ. of Crete (2007)
    (pdf)
  6. On Power Laws and the Semantic Web, Yannis Theoharis, Master's Thesis, Univ. of Crete (2007)
    (pdf)
  7. RUL: a Declarative Language for Updating RDF Data, Stavros Sahtouris, Master's Thesis, Univ. of Crete (2006)
    (pdf)
  8. Indexing Views to Route and Plan Queries in a Peer Data Management System, L. Sidirourgos, Master's Thesis, Univ. of Crete (2005)
    (pdf)
  9. Semantic Query Routing and Planning in Peer-to-Peer Database Systems: The SQPeer Middleware, G. Kokkinidis, Master's Thesis, Univ. of Crete (2005)
    (pdf)
  10. Formal Model for the Representation of User Preferences Regarding Object Collection Orderings, M. Stratakis, Master's Thesis, Univ. of Crete (2005)
    (pdf)
  11. Optimizing and reformulating RQL queries on the Semantic Web, G. Serfiotis, Master's Thesis, Univ. of Crete (2005)
    (pdf)
  12. Integrating XML data sources using RDF/S Schemas: The ICS-FORTH Semantic Web Integration Middleware (SWIM), I. Koffina, Master's Thesis, Univ. of Crete (2005)
    (pdf)
  13. SWPG: Semantic Web Portal Generator, N. Athanasis, Master's Thesis, Univ. of Crete (2004) (Available in Greek only)
    (pdf)
  14. A View Definition Language for RDF/S, A. Magkanaraki, Master's Thesis, Univ. of Crete (2003) (Available in Greek only)
    (pdf)
  15. Labeling Schemes for the Semantic Web, S. Tourtounis, Master's Thesis, Univ. of Crete (2003) (Available in Greek only)
    (pdf)
  16. Querying RDF metadata for Community Web Portals, G. Karvounarakis, Master's Thesis, Univ. of Crete (2000) (Available in Greek only)
    (ps) (pdf)
  17. Storage of RDF metadata for Community Web Portals, S. Alexaki, Master's Thesis, Univ. of Crete (2000) (Available in Greek only)
    (pdf)
  18. Validating RDF Parser: A Tool for Parsing and Validating RDF Metadata and Schemas, K. Tolle, Master's Thesis, Univ. of Hannover (2000)
    (pdf)

Last modified: February 20, 2009