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https://issues.apache.org/jira/browse/JENA-1499?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16388641#comment-16388641
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Andy Seaborne edited comment on JENA-1499 at 3/6/18 10:41 PM:
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Could you explain a bit about what {{QuadTableForm.GSPO.listGraphNodes}} is
doing? I haven't looked at these details of {{QuadTableForm}} before. Can empty
graphs appear in other ways? Does traversal of {{G\?\?\?}} simply on generate
quads if the subtree is partial (i.e. empty) some how in {{GS\?\?}} ?
was (Author: andy.seaborne):
Could you explain a bit about what {{QuadTableForm.GSPO.listGraphNodes}} is
doing? I haven't looked at these details of `QuadTableForm` before. Can empty
graphs appear in other ways? Does traversal of {{G\?\?\?}} simply on generate
quads if the subtree is partial (i.e. empty) some how in {{GS\?\?}} ?
> The TIM dataset retains a memory of named graphs after deleting all quads.
> --------------------------------------------------------------------------
>
> Key: JENA-1499
> URL: https://issues.apache.org/jira/browse/JENA-1499
> Project: Apache Jena
> Issue Type: Bug
> Affects Versions: Jena 3.6.0
> Reporter: Andy Seaborne
> Priority: Major
>
> Illustration:
> {noformat}
> DatasetGraph dsg = DatasetGraphFactory.createTxnMem();
> Quad q = SSE.parseQuad("(:g :s :p :o)");
> dsg.add(q);
> dsg.delete(q);
> Iter.print(dsg.listGraphNodes());
> {noformat}
> prints {{http://example/g}}.
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