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https://issues.apache.org/jira/browse/JENA-366?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13534821#comment-13534821
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Andy Seaborne commented on JENA-366:
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<urn:x-arq:UnionGraph> is specific to Jena. Backends can choose to provide it
or not.
How does DB2/RDF control whether the default graph is the union of named graphs
or is a true, separate graph? If it is reading he assembler file to get
UnionDefaultGraph, how does it pass it to the storage/query engine? Is it in a
way that can apply to all storage implementations.
Please do submit a patch to Fuseki for the feature of setting a query to
execute with the default graph for the query to be the union of named graphs -
ideally, please make it general and not DB2 specific.
> Support for setting UnionDefaultGraph while running SPARQL queries on FUSEKI
> ----------------------------------------------------------------------------
>
> Key: JENA-366
> URL: https://issues.apache.org/jira/browse/JENA-366
> Project: Apache Jena
> Issue Type: Question
> Components: Fuseki
> Affects Versions: Fuseki 0.2.5
> Reporter: Priyaranjan
>
> Currently in FUSEKI we dont have an option to set UnionDefaultGraph while
> running SPARQL queries. Though we can set UnionDefaultGraph in the
> DatasetAssembler , but then it limits the user from specifying this option
> while querying.
> Is it possible to give the user an option to pass the value for
> UnionDefaultGraph in the FUSEKI UI , and set it to the context.
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