Results 1 - 10 of 109

Dynamic provenance for SPARQL updates

by Harry Halpin, James Cheney - In ISWC , 2014
"... Abstract. While the Semantic Web currently can exhibit provenance informa-tion by using the W3C PROV standards, there is a “missing link ” in connect-ing PROV to storing and querying for dynamic changes to RDF graphs using SPARQL. Solving this problem would be required for such clear use-cases as th ..."
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Abstract. While the Semantic Web currently can exhibit provenance informa-tion by using the W3C PROV standards, there is a “missing link ” in connect-ing PROV to storing and querying for dynamic changes to RDF graphs using SPARQL. Solving this problem would be required for such clear use

Query Evaluation with Constant Delay

by Thèse De Doctorat, Normale Supérieure, De Cachan, Présentée Par, Monsieur Wojciech Kazana, Docteur De, Supérieure De Cachan, Nicole Bidoit, Professeur Président, Arnaud Durand, Patrice Ossona, Mendez Chargé, Victor Vianu, Professeur Examinateur, Luc Segoufin, Directeur Recherche Directeur
"... I am grateful to Luc Segoufin who kindly accepted me to be his PhD student. He introduced me to the problem of query enumeration and encouraged me to look for the answers to all the questions that emerged during our collaboration. He was a truly great advisor, always supportive and available for dis ..."
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I am grateful to Luc Segoufin who kindly accepted me to be his PhD student. He introduced me to the problem of query enumeration and encouraged me to look for the answers to all the questions that emerged during our collaboration. He was a truly great advisor, always supportive and available

Object/relational query optimization with chase

by Lucian Popa
"... and backchase ..."
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and backchase

Cross-Platform Provenance

by Ashish Gehani, Dawood Tariq
"... A number of systems have been developed to track workflows – for example, CMCS helps chemists document combustion research [10], my Grid [14] with Taverna [1] aids biologists, and ESSW is used by earth scientists [5]. Since most infrastructure developed to record the provenance of data has targeted ..."
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A number of systems have been developed to track workflows – for example, CMCS helps chemists document combustion research [10], my Grid [14] with Taverna [1] aids biologists, and ESSW is used by earth scientists [5]. Since most infrastructure developed to record the provenance of data has targeted

View-based query answering and query containment over semistructured data

by Diego Calvanese, Giuseppe De Giacomo, Maurizio Lenzerini, Moshe Y. Vardi - REVISED PAPERS OF THE 8TH INTERNATIONAL WORKSHOP ON DATABASE PROGRAMMING LANGUAGES (DBPL 2001), VOLUME 2397 OF LNCS , 2001
"... The basic querying mechanism over semistructured data, namely regular path queries, asks for all pairs of objects that are connected by a path conforming to a regular expression. We consider conjunctive two-way regular path queries (C2RPQc’s), which extend regular path queries with two features. F ..."
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The basic querying mechanism over semistructured data, namely regular path queries, asks for all pairs of objects that are connected by a path conforming to a regular expression. We consider conjunctive two-way regular path queries (C2RPQc’s), which extend regular path queries with two features

Query capabilities of the Karma

by Provenance Framework, Yogesh L. Simmhan, Beth Plale, Dennis Gannon
"... Provenance metadata in e-Science captures the derivation history of data products generated from scientific workflows. Provenance forms a glue linking workflow execution with associated data products, and finds use in determining the quality of derived data, tracking resource usage, and for verifyin ..."
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Provenance metadata in e-Science captures the derivation history of data products generated from scientific workflows. Provenance forms a glue linking workflow execution with associated data products, and finds use in determining the quality of derived data, tracking resource usage

D-PROV: Extending the PROV Provenance Model with Workflow Structure

by Paolo Missier, Saumen Dey, Khalid Belhajjame, Bertram Ludäscher
"... This paper presents an extension to the W3C PROV1 provenance model, aimed at representing process structure. Although the modelling of process structure is out of the scope of the PROV specification, it is beneficial when capturing and analyzing the provenance of data that is produced by programs or ..."
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or other formally encoded processes. In the paper, we motivate the need for such and extended model in the context of an ongoing large data federation and preservation project, DataONE2, where provenance traces of scientific workflow runs are captured and stored alongside the data products. We introduce

Author manuscript, published in "ICDT (2012) 46-60" Highly Expressive Query Languages for Unordered Data Trees ∗

by Serge Abiteboul, Pierre Bourhis, Victor Vianu , 2012
"... We study highly expressive query languages for unordered data trees, using as formal vehicles Active XML and extensions of languages in the while family. All languages may be seen as adding some form of control on top of a set of basic pattern queries. The results highlight the impact and interplay ..."
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We study highly expressive query languages for unordered data trees, using as formal vehicles Active XML and extensions of languages in the while family. All languages may be seen as adding some form of control on top of a set of basic pattern queries. The results highlight the impact and interplay

A Data Model and Query Language to Explore Enhanced Links and Paths in Life Science Sources

by George Mihaila, Felix Naumann, Louiqa Raschid - Links and Paths in Life Science Sources. Proceedings of the Workshop on the Web and databases (WebDB , 2005
"... A BC@>?@9%.1DEB= ?CFA 0C4G= DHA .10I20=JK58L 9<GM NPOQ=JR9<S 9!3;?@;<9<34;A BC@>?@9%.1DEB= ?CFA 0C4G= DHA .10I2 C@.1= 03,A?@9[0= C\?@.1;]X^.V0_9<.8C@X9?%?@9<B?@9<39<0CFAC@.1= 0`= ?%39<DHA0C@.V;3<N%aX.13 BA B9?KB?@= B= 39<3bC@X9Ecdfe g:hij7k? ..."
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A BC@>?@9%.1DEB= ?CFA 0C4G= DHA .10I20=JK58L 9<GM NPOQ=JR9<S 9!3;?@;<9<34;A BC@>?@9%.1DEB= ?CFA 0C4G= DHA .10I2 C@.1= 03,A?@9[0= C\?@.1;]X^.V0_9<.8C@X9?%?@9<B?@9<39<0CFAC@.1= 0`= ?%39<DHA0C@.V;3<N%aX.13 BA B9?KB?@= B= 39<3bC@X9Ecdfe g:hij7k

Modeling and Querying Primitives for Digital Media

by Munish Gandhi, Edward L. Robertson, Dirk Van Gucht , 1994
"... We present a data model and equivalent rule-based and visual query formalisms for managing digital media data -- specifically, audio and video data. The query formalisms in the paper are also equivalent to an algebra. The simplicity and equivalence of these formalisms provides evidence that the conc ..."
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information about the track and maintain links between tracks. At this layer, the media track is c...
Results 1 - 10 of 109