BibSonomyburst/author/KarvounarakisBibSonomy RSS feed for /author/Karvounarakis2012-02-16T11:37:19+01:00http://www.bibsonomy.org/bibtex/28f19e0cfcddcbeee216a53eb381a41d1/dblpdblp2011-11-25T00:00:00+01:00dblp <span class="authorEditorList"><a href="/author/Karvounarakis">Grigoris Karvounarakis</a> </span><em>Encyclopedia of Database Systems, </em><em>Springer US, </em>(<em>2009</em>)Fri Nov 25 00:00:00 CET 2011Encyclopedia of Database Systemsreference/db/2009751-754Datalog.2009dblp http://www.bibsonomy.org/bibtex/2180ee73ffd48c7caca4ff34467316cba/dblpdblp2011-09-16T00:00:00+02:00dblp <span class="authorEditorList"><a href="/author/Christophides">Vassilis Christophides</a>, <a href="/author/Karvounarakis">Gregory Karvounarakis</a>, <a href="/author/Magkanaraki">Aimilia Magkanaraki</a>, <a href="/author/Plexousakis">Dimitris Plexousakis</a>, and <a href="/author/Tannen">Val Tannen</a> </span><em>IEEE Data Eng. Bull.</em> <em>26(4):11-18</em> (<em>2003</em>)Fri Sep 16 00:00:00 CEST 2011IEEE Data Eng. Bull.411-18The ICS-FORTH Semantic Web Integration Middleware (SWIM).262003dblp http://www.bibsonomy.org/bibtex/2523b17ba9730ecd05108f3c9d4826f9b/schmidt2schmidt22011-09-06T11:36:31+02:00metalog query_language rdf sql state-of-the-art xql <span class="authorEditorList"><a href="/author/Karvounarakis">Greg Karvounarakis</a> </span>(<em>1999</em>)Tue Sep 06 11:36:31 CEST 2011RDF Query Languages: A state-of-the-art1999metalog query_language rdf sql state-of-the-art xql RDF Query Languages: A state-of-the-arthttp://www.bibsonomy.org/bibtex/2f1f9bf72d962ef316d699cdb892f457f/dblpdblp2011-08-08T00:00:00+02:00dblp <span class="authorEditorList"><a href="/author/Theoharis">Yannis Theoharis</a>, <a href="/author/Fundulaki">Irini Fundulaki</a>, <a href="/author/Karvounarakis">Grigoris Karvounarakis</a>, and <a href="/author/Christophides">Vassilis Christophides</a> </span><em>IEEE Internet Computing</em> <em>15(1):31-39</em> (<em>2011</em>)Mon Aug 08 00:00:00 CEST 2011IEEE Internet Computing131-39On Provenance of Queries on Semantic Web Data.152011dblp http://www.bibsonomy.org/bibtex/296ade58d740c1147461bfe1649fa92d8/dblpdblp2011-06-28T00:00:00+02:00dblp <span class="authorEditorList"><a href="/author/Christophides">Vassilis Christophides</a>, <a href="/author/Hull">Richard Hull</a>, <a href="/author/Karvounarakis">Gregory Karvounarakis</a>, <a href="/author/Kumar">Akhil Kumar</a>, <a href="/author/Tong">Geliang Tong</a>, and <a href="/author/Xiong">Ming Xiong</a> </span><em>TES, </em><em>volume 2193 of Lecture Notes in Computer Science, </em><em>page 58-73. </em><em>Springer, </em>(<em>2001</em>)Tue Jun 28 00:00:00 CEST 2011TESconf/tes/200158-73Lecture Notes in Computer ScienceBeyond Discrete E-Services: Composing Session-Oriented Services in Telecommunications.21932001dblp http://www.bibsonomy.org/bibtex/2a717188c38112d109c38b8111668aa11/hiddershidders2011-04-28T13:19:08+02:00imported <span class="authorEditorList"><a href="/author/Theoharis">Yannis Theoharis</a>, <a href="/author/Christophides">Vassilis Christophides</a>, and <a href="/author/Karvounarakis">Gregory Karvounarakis</a> </span><em>ISWC, </em><em>page 685-701. </em><em>Galway, Ireland, </em>(<em>2005</em>)Thu Apr 28 13:19:08 CEST 2011Galway, IrelandISWC685-701{Benchmarking Database Representations of RDF/S Stores}2005imported http://www.bibsonomy.org/bibtex/24b9e5fddd23b3f55220676a797e2d246/dblpdblp2011-01-11T00:00:00+01:00dblp <span class="authorEditorList"><a href="/author/Green">Todd J. Green</a>, <a href="/author/Karvounarakis">Grigoris Karvounarakis</a>, <a href="/author/Ives">Zachary G. Ives</a>, and <a href="/author/Tannen">Val Tannen</a> </span><em>IEEE Data Eng. Bull.</em> <em>33(3):9-16</em> (<em>2010</em>)Tue Jan 11 00:00:00 CET 2011IEEE Data Eng. Bull.39-16Provenance in ORCHESTRA.332010dblp http://www.bibsonomy.org/bibtex/2b7bd56fdf78a302f826b1a64b80f43a4/dblpdblp2010-07-21T16:02:22+02:00dblp <span class="authorEditorList"><a href="/author/Karvounarakis">Grigoris Karvounarakis</a>, <a href="/author/Ives">Zachary G. Ives</a>, and <a href="/author/Tannen">Val Tannen</a> </span><em>SIGMOD Conference, </em><em>page 951-962. </em><em>ACM, </em>(<em>2010</em>)Wed Jul 21 16:02:22 CEST 2010SIGMOD Conferenceconf/sigmod/2010951-962Querying data provenance.2010dblp http://www.bibsonomy.org/bibtex/2480369cc33ed7ab139be3eeff2f9b018/hiddershidders2010-07-09T12:09:59+02:00rdf-indexing <span class="authorEditorList"><a href="/author/Theoharis">Yannis Theoharis</a>, <a href="/author/Christophides">Vassilis Christophides</a>, and <a href="/author/Karvounarakis">Grigoris Karvounarakis</a> </span><em>The Semantic Web --ISWC 2005</em> (<em>2005</em>)Fri Jul 09 12:09:59 CEST 2010The Semantic Web --ISWC 2005685--701Benchmarking Database Representations of RDF/S Stores2005rdf-indexing In this paper we benchmark three popular database representations of RDF/S schemata and data: (a) a schema-aware (i.e., one table per RDF/S class or property) with explicit (ISA) or implicit (NOISA) storage of subsumption relationships, (b) a schema-oblivious (i.e., a single table with triples of the form subject-predicate-object ), using (ID) or not (URI) identifiers to represent resources and (c) a hybrid of the schema-aware and schema-oblivious representations (i.e., one table per RDF/S meta-class by distinguishing also the range type of properties). Furthermore, we benchmark two common approaches for evaluating taxonomic queries either on-the-fly (ISA, NOISA, Hybrid), or by precomputing the transitive closure of subsumption relationships (MatView, URI, ID). The main conclusion drawn from our experiments is that the evaluation of taxonomic queries is most efficient over RDF/S stores utilizing the Hybrid and MatView representations. Of the rest, schema-aware representations (ISA, NOISA) exhibit overall better performance than URI, which is superior to that of ID, which exhibits the overall worst performance. http://www.bibsonomy.org/bibtex/24269e1c675970fcf7fe3c3e103c4c59d/kweiandkweiand2010-05-13T11:34:37+02:00Querying, RDF, XML, XML-RDF hybrid search, <span class="authorEditorList"><a href="/author/Robie">Jonathan Robie</a>, <a href="/author/Garshol">Lars Marius Garshol</a>, <a href="/author/Newcomb">Steve Newcomb</a>, <a href="/author/Biezunski">Michel Biezunski</a>, <a href="/author/Fuchs">Matthew Fuchs</a>, <a href="/author/Miller">Libby Miller</a>, <a href="/author/Brickley">Dan Brickley</a>, <a href="/author/Christophides">Vassillis Christophides</a>, and <a href="/author/Karvounarakis">Gregorius Karvounarakis</a> </span><em>Markup Lang.</em> <em>3(4):411--440</em> (<em>2001</em>)Thu May 13 11:34:37 CEST 2010Cambridge, MA, USAMarkup Lang.4411--440The syntactic web32001Querying, RDF, XML, XML-RDF hybrid search, XQuery is a query language designed to allow queries across the many kinds of information that are represented in XML. Although topic maps and RDF can also be represented in XML, many have held that their many possible syntactic forms make them extremely difficult to query using an XML query language, and that they can only be queried using special-purpose query languages with built-in knowledge of their semantics, including the ability to exploit RDF schema information. This talk shows that XQuery can, in fact, be used to solve the kinds of queries for which RDF and topic map query languages were designed, though with a loss of type safety. The approach taken is to transform instances of RDF and topic maps to a syntactic representation that closely models their underlying logical models, and to use function libraries written in XQuery to directly support operations specific to RDF or topic maps. Schema level information is also incorporated in this repres- entation, and is supported in the library, so queries can exploit type hierarchies and perform joins across predicates. Information from other XML sources can also be queried together with inform- ation from topic maps and RDF. For instance, a query on a topic maps that searches for Shakespeare plays mentioned in Italian operas can also query the plays themselves -- represented in XML -- to determine which Italian cities are mentioned in them. Syntax is not the opposite of semantics, it is a medium for semantics. http://www.bibsonomy.org/bibtex/2bea35a6d6d37531e19c62dba9a0ccb86/kurtjxkurtjx2009-12-03T11:47:31+01:00provenance semanticweb semirings sparql <span class="authorEditorList"><a href="/author/Green">Todd J. Green</a>, <a href="/author/Karvounarakis">Grigoris Karvounarakis</a>, and <a href="/author/Tannen">Val Tannen</a> </span><em>PODS &#039;07: Proceedings of the twenty-sixth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems, </em><em>page 31--40. </em><em>New York, NY, USA, </em><em>ACM, </em>(<em>2007</em>)Thu Dec 03 11:47:31 CET 2009New York, NY, USAPODS '07: Proceedings of the twenty-sixth ACM SIGMOD-SIGACT-SIGART symposium on Principles of database systems31--40Provenance semirings2007provenance semanticweb semirings sparql provenance semiring and databaseshttp://www.bibsonomy.org/bibtex/2855f9022a8ac5020c0cda560b1742e0f/jeenbroekstrajeenbroekstra2009-04-02T11:07:42+02:002000 query rql storage <span class="authorEditorList"><a href="/author/Karvounarakis">Gregory Karvounarakis</a>, <a href="/author/Christophides">Vassilis Christophides</a>, <a href="/author/Plexousakis">Dimitris Plexousakis</a>, and <a href="/author/Alexaki">Sofia Alexaki</a> </span><em>Institute of Computer Science, FORTH, </em><em>Heraklion, Greece, </em>(<em>2000</em>)Thu Apr 02 11:07:42 CEST 2009Heraklion, GreeceSee \url{http://www.ics.forth.gr/proj/isst/RDF/RQL/rql.pdf}Querying Community Web Portals20002000 query rql storage http://www.bibsonomy.org/bibtex/2edec4394654dd635120f3a1990931f14/jeenbroekstrajeenbroekstra2009-04-02T11:07:42+02:002000 query rdf rdfsuite rql storage <span class="authorEditorList"><a href="/author/Alexaki">Sofia Alexaki</a>, <a href="/author/Christophides">Vassilis Christophides</a>, <a href="/author/Karvounarakis">Greg Karvounarakis</a>, <a href="/author/Plexousakis">Dimitris Plexousakis</a>, and <a href="/author/Tolle">Karsten Tolle</a> </span><em>Institute of Computer Science, FORTH, </em><em>Heraklion, Greece, </em>(<em>2000</em>)Thu Apr 02 11:07:42 CEST 2009Heraklion, GreeceSee \url{http://www.ics.forth.gr/proj/isst/RDF/RSSDB/rdfsuite.pdf}{The RDFSuite: Managing Voluminous RDF Description Bases}20002000 query rdf rdfsuite rql storage http://www.bibsonomy.org/bibtex/2a282a3ea2a369a72d7735f3db5de8aee/jeenbroekstrajeenbroekstra2009-04-02T11:07:42+02:00ontology query storage <span class="authorEditorList"><a href="/author/Maganaraki">A. Maganaraki</a>, <a href="/author/Karvounarakis">G. Karvounarakis</a>, <a href="/author/Christophides">V. Christophides</a>, <a href="/author/Plexousakis">D. Plexousakis</a>, and <a href="/author/Anh">T. Anh</a> </span><em>308. </em><em>Foundation for Research and Technology Hellas, Institute of Computer Science, Information Systems Laboratory, </em>(<em>April 2002</em>)Thu Apr 02 11:07:42 CEST 2009April308Ontology Storage and Querying2002ontology query storage http://www.bibsonomy.org/bibtex/25dfba0f947e77ed5f1209372800d0931/jeenbroekstrajeenbroekstra2009-04-02T11:07:42+02:00WWW query rdf rql <span class="authorEditorList"><a href="/author/Karvounarakis">G. Karvounarakis</a>, <a href="/author/Alexaki">S. Alexaki</a>, <a href="/author/Christophides">V. Christophides</a>, <a href="/author/Plexousakis">D. Plexousakis</a>, and <a href="/author/Schol">M. Schol</a> </span><em>Proceedings of the Eleventh International World Wide Web Conference WWW&#039;02, </em><em>Honolulu, Hawaii, USA, </em>(<em>May 2002</em>)Thu Apr 02 11:07:42 CEST 2009Honolulu, Hawaii, USA{Proceedings of the Eleventh International World Wide Web Conference (WWW'02)}May7-11{RQL: A Declarative Query Language for RDF}2002WWW query rdf rql http://www.bibsonomy.org/bibtex/274fcb89fed985eccc000ca77d57a6014/casicasi2009-02-13T13:32:50+01:00benchmark rdf stores <span class="authorEditorList"><a href="/author/Theoharis">Yannis Theoharis</a>, <a href="/author/Christophides">Vassilis Christophides</a>, and <a href="/author/Karvounarakis">Grigoris Karvounarakis</a> </span><em>Proceedings of the 4th International Semantic Web Conference, ISWC04, Galway, Ireland, </em>(<em>2005</em>)Fri Feb 13 13:32:50 CET 2009Proceedings of the 4th International Semantic Web Conference, ISWC04, Galway, IrelandBenchmarking Database Representations of RDF/S Stores"2005benchmark rdf stores http://www.bibsonomy.org/bibtex/2ec7d8e120e31632579776a5d42fef708/breznbenebreznbene2008-12-11T14:17:07+01:00Language Query RDF RDFQueryLanguage RQL WebQueryLanguage functional language query rdf rql <span class="authorEditorList"><a href="/author/Karvounarakis">G. Karvounarakis</a>, <a href="/author/Magkanaraki">A. Magkanaraki</a>, <a href="/author/Alexaki">S. Alexaki</a>, <a href="/author/Christophides">V. Christophides</a>, <a href="/author/Plexousakis">D. Plexousakis</a>, <a href="/author/Scholl">M. Scholl</a>, and <a href="/author/Tolle">K. Tolle</a> </span><em>The Functional Approach to Data Management: Modelling, Analyzing and Integrating Heterogeneous Data, </em><em>page 435-465. </em><em>Springer-Verlag, </em>(<em>2004</em>)Thu Dec 11 14:17:07 CET 2008The Functional Approach to Data Management: Modelling, Analyzing and Integrating Heterogeneous Data435-465LNCS{RQL}: A Functional Query Language for {RDF}2004Language Query RDF RDFQueryLanguage RQL WebQueryLanguage functional language query rdf rql http://www.bibsonomy.org/bibtex/232c6928bfe1bbb4669ae88b677090d51/breznbenebreznbene2008-12-11T14:17:07+01:00Query RDF <span class="authorEditorList"><a href="/author/Karvounarakis">Gregory Karvounarakis</a>, <a href="/author/Alexaki">Sofia Alexaki</a>, <a href="/author/Christophides">Vassilis Christophides</a>, <a href="/author/Plexousakis">Dimitris Plexousakis</a>, and <a href="/author/Scholl">Michel Scholl</a> </span><em>Proceedings of the eleventh international conference on World Wide Web, </em><em>page 592-603. </em>(<em>2002</em>)Thu Dec 11 14:17:07 CET 2008Proceedings of the eleventh international conference on {W}orld {W}ide {W}eb592-603R{QL}: {A} {D}eclarative {Q}uery {L}anguage for {RDF}2002Query RDF Real scale {S}emantic {W}eb applications such as {W}eb {P}ortals and {E} {M}arketplaces re quire the management of voluminous metadata repositories containing descriptive infor mation i e metadata about the available {W}eb resources and services {B}etter knowledge about the meaning usage accessibility or quality of these resources and services will con siderably facilitate the automated processing of both {W}eb content and services {I}n this context the {R}esource {D}escription {F}ramework {RDF} enables the creation and exchange of metadata as any other {W}eb data {A}lthough large volumes of {RDF} descriptions are already appearing e g as exported {P}ortal catalogs or service descriptions su ciently expressive declarative languages for querying both {RDF} descriptions and schemas are still missing {I}n this paper we propose {RQL} a new {RDF} query language relying on a formal graph model that permits the interpretation of superimposed resource descriptions {RQL} is an {OQL} inspired adaptation of {XML} query languages to the peculiarities of {RDF} but foremost is an extension of this functionality for uniformly querying both descriptions and schemas {W}e illustrate the syntax semantics and core functionality of {RQL} by means of a set of benchmark queries and report on the performance of {RSSDB} our persistent {RDF} {S}tore for storing and querying voluminous {RDF} descriptionshttp://www.bibsonomy.org/bibtex/2ec7d8e120e31632579776a5d42fef708/benedikt.linsebenedikt.linse2008-11-27T20:49:48+01:00Language Query RDF RDFQueryLanguage RQL WebQueryLanguage functional language query rdf rql <span class="authorEditorList"><a href="/author/Karvounarakis">G. Karvounarakis</a>, <a href="/author/Magkanaraki">A. Magkanaraki</a>, <a href="/author/Alexaki">S. Alexaki</a>, <a href="/author/Christophides">V. Christophides</a>, <a href="/author/Plexousakis">D. Plexousakis</a>, <a href="/author/Scholl">M. Scholl</a>, and <a href="/author/Tolle">K. Tolle</a> </span><em>The Functional Approach to Data Management: Modelling, Analyzing and Integrating Heterogeneous Data, </em><em>page 435-465. </em><em>Springer-Verlag, </em>(<em>2004</em>)Thu Nov 27 20:49:48 CET 2008The Functional Approach to Data Management: Modelling, Analyzing and Integrating Heterogeneous Data435-465LNCS{RQL}: A Functional Query Language for {RDF}2004Language Query RDF RDFQueryLanguage RQL WebQueryLanguage functional language query rdf rql http://www.bibsonomy.org/bibtex/2a493ad506d28fb39adc86296a51a1b45/dblpdblp2008-11-25T00:00:00+01:00dblp <span class="authorEditorList"><a href="/author/Ives">Zachary G. Ives</a>, <a href="/author/Green">Todd J. Green</a>, <a href="/author/Karvounarakis">Grigoris Karvounarakis</a>, <a href="/author/Taylor">Nicholas E. Taylor</a>, <a href="/author/Tannen">Val Tannen</a>, <a href="/author/Talukdar">Partha Pratim Talukdar</a>, <a href="/author/Jacob">Marie Jacob</a>, and <a href="/author/Pereira">Fernando Pereira</a> </span><em>SIGMOD Record</em> <em>37(3):26-32</em> (<em>2008</em>)Tue Nov 25 00:00:00 CET 2008SIGMOD Record326-32The ORCHESTRA Collaborative Data Sharing System.372008dblp dblp