Basic Graph Pattern - Information & Software Engineering Group

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• RDF data stores may hold multiple RDF graphs: • record information about each graph • queries that involve information from more than one graph • RDF Dataset in SPARQL terminology • the background graph, which does not have a name, and zero or more named graphs, identified by URI reference • the relationship between named and background graphs: • (i) to have information in the background graph that includes provenance information about the named graphs (the application is not directly trusting the information in the named graphs ) • (ii) to include the information in the named graphs in the background graph as well.
# Background graph @prefix dc: . dc:publisher "Bob" . dc:publisher "Alice" . # <strong>Graph</strong>: http://example.org/bob @prefix foaf: . _:a foaf:name "Bob" . _:a foaf:mbox . # <strong>Graph</strong>: http://example.org/alice @prefix foaf: . _:a foaf:name "Alice" . _:a foaf:mbox .
Page 1 and 2: Dr. Hoang Huu Hanh, SoST - DoIT, HU
Page 3 and 4: • RDF -flexible and extensible wa
Page 5 and 6: • Set of Triple Patterns • Trip
Page 7 and 8: Data @prefix foaf: . _:a foaf:name
Page 9 and 10: PREFIX foaf: SELECT ?name ?mbox WH
Page 11 and 12: Data @prefix dc: . @prefix : . @p
Page 13 and 14: Data @prefix dc: . @prefix : . @p
Page 15 and 16: Basic Graph Patterns -set of Triple
Page 17: Basic Graph Pattern -set of Triple
Page 21 and 22: # Graph: http://example.org/foaf/al
Page 23 and 24: PREFIX foaf: PREFIX data: SELECT
Page 25 and 26: • Optional‐1: an optional patte
Page 27 and 28: @prefix foaf: . _:a foaf:name "Ali
Page 29 and 30: PREFIX ent: DESCRIBE ?x WHERE { ?x
Page 31 and 32: • SPARQL and Jena • module call

Basic Graph Pattern - Information & Software Engineering Group

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