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https://issues.apache.org/jira/browse/JENA-675?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14012275#comment-14012275
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ASF subversion and git services commented on JENA-675:
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Commit 1598254 from [~rvesse]
[ https://svn.apache.org/r1598254 ]
Rework Turtle and TriG output to use StreamRDF via WriterStreamRDFBlocks to fix
invalid data produced when batching blank node output (JENA-675)
> Add and use a WriterProfile API
> -------------------------------
>
> Key: JENA-675
> URL: https://issues.apache.org/jira/browse/JENA-675
> Project: Apache Jena
> Issue Type: Improvement
> Components: ARQ, RIOT
> Affects Versions: Jena 2.11.1
> Reporter: Rob Vesse
> Assignee: Andy Seaborne
> Attachments: DevFragWrite.java
>
>
> Currently we have a {{ParserProfile}} which allows specifying certain aspects
> of input behaviour such as Prologue and Label to Node ID
> However we don't have a corresponding {{WriterProfile}} API, we actually have
> a class called {{OutputProfile}} but this is never actually used anywhere.
> This would be particularly useful for languages that rely on the
> {{NodeFormatter}} API where we can find comments such as the following:
> {quote}
> // Replace with a single "OutputPolicy"
> {quote}
> The lack of this API means we don't provide users any ability to do things
> like control how blank node IDs are allocated. And existing functionality we
> do give them like providing a set of namespaces and base URI to use for
> serialisation needs to be folded into this API.
> I know of two places where this is currently causing issues:
> * In the incoming Hadoop RDF Tools code (JENA-666) many output formats
> currently mangle the data when outputting blank nodes because they can't
> share a {{NodeToLabel}} instance over multiple writer runs.
> * In an internal bug at Cray we're seeing a situation where different code
> paths lead to different presentation of blank nodes and we have no APIs to
> allow us to control this presentation.
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