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https://issues.apache.org/jira/browse/JENA-491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14390549#comment-14390549
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Andy Seaborne commented on JENA-491:
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The grammar used for SPARQL is itself generated by script {{grammar}}. The file
{{master.jj}} generates both {{sparql_11.jj}}, strandard unextended SPARQL 1.1,
and {{arq.jj}}, which is SPARQL 1.1 together with Jena ARQ specific extensions.
This will be one such extension. The project should modify {{master.jj}} (see
the {{#if ARQ}} for sections that only go in {{arq.jj}} - the fiel is processed
with cpp.
> Extend CONSTRUCT to build quads
> -------------------------------
>
> Key: JENA-491
> URL: https://issues.apache.org/jira/browse/JENA-491
> Project: Apache Jena
> Issue Type: Improvement
> Components: ARQ, Fuseki
> Reporter: Andy Seaborne
> Labels: gsoc, gsoc2015, java, linked_data, rdf, sparql
>
> This would be an extension to SPARQL.
> 1/ Add use of GRAPH inside a CONSTRUCT template see SPARQL Update.
> 2/ Add conneg for quads to Fuseki.
> 3/ New QueryExecution operations execConstructQuads() and
> execConstructDataset()
> If asked for triples, and the CONSTRUCT generates quads, the named graph
> items are dropped - that is, only the default graph is returned. This is for
> commonality with RIOT.
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