'Sparql' diaporamas de présentation

Querying the Web of Data with SPARQL and XSPARQL

web: www.polleres.net twitter:@AxelPolleres. Querying the Web of Data with SPARQL and XSPARQL.

1.1k views • 92 slides

Chapter 3 Querying the Semantic Web

Chapter 3 Querying the Semantic Web. Grigoris Antoniou Paul Groth Frank van Harmelen Rinke Hoekstra. Lecture Outline. SPARQL Infrastructure Basics: Matching Patterns Filters Constructs for Dealing with an Open World Organizing Result Sets Other forms of SPARQL Queries Querying Schemas

975 views • 67 slides

Chapter 3 Querying the Semantic Web

Chapter 3 Querying the Semantic Web. Grigoris Antoniou Paul Groth Frank van Harmelen Rinke Hoekstra. Lecture Outline. SPARQL Infrastructure Basics: Matching Patterns Filters Constructs for Dealing with an Open World Organizing Result Sets Other forms of SPARQL Queries Querying Schemas

849 views • 67 slides

SPARQL Part II

SPARQL Part II. Jan Pettersen Nytun, UiA. First a small SPARQL example. Jan Pettersen Nytun, UiA. [4]:. Ask: SELECT ?who WHERE { : JamesDean : playedIn ?what . ? what : directedBy ?who . }

665 views • 66 slides

Rewriting Queries on SPARQL Views

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SPARQL

566 views • 37 slides

Graphically Querying RDF Using RDF-GL

Graphically Querying RDF Using RDF-GL.

453 views • 31 slides

On Provenance of Queries on Linked Web Data

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Reasoning and Querying for the Web urq.deri.ie

Reasoning and Querying for the Web http://urq.deri.ie. Dr. Axel Polleres. Problem: The Web is not(!) a database. Dynamics: historical data changes, trends. <RDF>. Sensors: limited resources distribution incomplete data. <XML>. RDBMS. Social Interactions: Aggregated view vs.

257 views • 25 slides

Implementation of Topic Centered Portals

Implementation of Topic Centered Portals. David Norheim Computas AS, Norway Robert Engels, ESIS AS, Norway. Motivation The system Challenges and lessons learned Future work. Computas. 23 years experience in knowledge management, expert systems, and process modeling

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The Semantic Web

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From SQL to SPARQL Symposium zur Pensionierung Prof. Wolfgang Panny

From SQL to SPARQL Symposium zur Pensionierung Prof. Wolfgang Panny. Axel Polleres web: http:// polleres.net twitter : @ AxelPolleres. Hintergrund. ~40 Jahre Forschung im Bereich Artif . Intelligence und Abfragesprachen an der WU Operations Research, Algorithmen, Datenbanken

320 views • 19 slides

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Information Extraction with Linked Life Data

Information Extraction with Linked Life Data. www.linkedlifedata.com. Linked Life Data Overview. Linked Life Data is a public and free RDF warehouse service Offers a SPARQL endpoint Integrates more than 25 popular biomedical data sources

314 views • 11 slides

A Semantic Web/RDF Library for .Net Developers

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Using the DAWG Test Cases with Relational Databases

Using the DAWG Test Cases with Relational Databases. Matthew Gheen mgheen@mcdonaldbradley.com October 26, 2007. Agenda. Introduction Running the tests Results Next Steps Discussion. Introduction. Semantic Bridge for Relational Databases (SBRD) Translates SPARQL to SQL

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The usual suspects

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Querying RDF: SPARQL 1.2/2.0 and imperative query languages

Querying RDF: SPARQL 1.2/2.0 and imperative query languages. Adrian Gschwend, Zazuko. SPARQL 1.2 & 2.0. SPARQL 1.2 Align functions we see everywhere (text search etc.) Add low-hanging fruits (various proposals/implementations) Does not break 1.0/1.1 SPARQL 2.0

49 views • 4 slides