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https://github.com/cookiengineer/audacity
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10 lines
191 B
SPARQL
10 lines
191 B
SPARQL
PREFIX xsd: <http://www.w3.org/2001/XMLSchema#>
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PREFIX : <http://example.org/ns#>
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SELECT ?a ?w
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WHERE
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{ ?a :p ?v .
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OPTIONAL
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{ ?a :q ?w } .
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FILTER ( ! ?w ) .
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}
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