The "SPARQL 101" lesson introduced SPARQL, explained how it relates to other query languages, and went through its basic syntax. This lesson builds on that foundation, primarily by example. It uses real-world SPARQL queries to illustrate the features of the query language as the quickest way to making the user productive. This is a technical lesson by nature.
URL: http://www.cambridgesemantics.com/semantic-university/sparql-nuts-bolts
Keywords: SPARQL, SPARQL endpoint, Named Graph, Default Graph
Publisher: Cambridge Semantics
Language: http://id.loc.gov/vocabulary/iso639-2/eng
Time required: P30M
Interactivity type: mixed
- Accesses DBPedia's SNORQL/SPARQL endpoint and issues simple queries.
- Demonstrates a working knowledge of the forms and uses of SPARQL result sets (SELECT, CONSTRUCT, DESCRIBE, and ASK).
- Differentiates between a Default Graph and a Named Graph, and formulates queries using the GRAPH clause.
- Understands how to combine and filter graph patterns using operators such as UNION, OPTIONAL, FILTER, and MINUS.
- Understands the major SPARQL result set modifiers, e.g., to limit or sort results, or to return distinct results only once.
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