This video serves as an introduction to the W3C query language for RDF, SPARQL. Before explaining SPARQL queries themselves, a brief discussion of Linked Data principles (RDF, Triples, HTTP URIs, Ontologies) is given. Sample data and queries used in video are available at http://learningsparql.com/misc/sparqlIn11Minutes.zip .
Keywords: SPARQL, HTTP URIs, Triple
Author: DuCharme, Bob
Date created: 2015-05-03 04:00:00.000
Time required: P15M
- Understands that a SPARQL query matches an RDF graph against a pattern of triples with fixed and variable values.
- Understands that URIs and literals denote things in the world ("resources") real, imagined, or conceptual.
- Uses CONSTRUCT to extract and transform results into a single RDF graph specified by a graph template.
- Uses variables in SELECT and WHERE clauses to yield a table of results.
- Uses NOT EXISTS to limit whether a given graph pattern exists in the data.