Fix issues with named graphs

Callidon / sparql-engine

🚂 A framework for building SPARQL query engines in Javascript/Typescript

https://callidon.github.io/sparql-engine

MIT License

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Closed Callidon closed 4 years ago

Callidon commented 4 years ago

This PR solves two issues:

fix #44 where a GRAPH clause with an unbounded IRI should be evaluated over all named graphs, even if there are no FROM NAMED clause(s) in the query.
Correct evaluation for SPARQL queries where a GRAPH clause with an unbounded IRI is bounded by another Graph pattern/SPARQL expression in the query.