1 / 7

SPARQL

SPARQL. 日期 :3/13. SPARQL. 全名 SPARQL Protocol and RDF Query Language. SPARQL is the query language of the Semantic Web. SPARQL. SPARQL is the query language of the Semantic Web. It lets us : Pull values from structured and semi-structured data Explore data by querying unknown relationships

fola
Télécharger la présentation

SPARQL

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. SPARQL 日期:3/13

  2. SPARQL • 全名 • SPARQL Protocol and RDF Query Language. • SPARQL is the query language of the Semantic Web

  3. SPARQL • SPARQL is the query language of the Semantic Web. It lets us: • Pull values from structured and semi-structured data • Explore data by querying unknown relationships • Perform complex joins of disparate databases in a single, simple query • Transform RDF data from one vocabulary to another 出處:http://www.cambridgesemantics.com/2008/09/sparql-byexample/#%281%29

  4. Structure of a SPARQL Query # base directive BASE <URI> # list of prefixes PREFIX pref: <URI> ... # result description SELECT... # graph to search FROM . . . # query pattern WHERE { ... } # query modifiers ORDER BY... 出處:http://www.cambridgesemantics.com/2008/09/sparql-byexample/#%281%29

  5. SPARQL-四種基本查詢 • SELECT query • ASK query • DESCRIBE query • CONSTRUCT query

  6. SPARQL-教學 • 劍橋大學的SPARQL教學網站 • http://www.cambridgesemantics.com/2008/09/sparql-by-example/#%281%29 • W3C Semantic Web Tutorial • http://www.w3.org/2008/Talks/0305-C-SHALS/#%281%29

  7. 目前有提供SPARQL測試的網站 • 4store http://www.4store.org • ARC http://arc.semsol.org • Joseki http://www.joseki.org • Redland http://librdf.org • Sesame Java http://www.openrdf.org • Virtuoso http://virtuoso.openlinksw.com

More Related