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https://issues.apache.org/jira/browse/JENA-1188?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15316515#comment-15316515
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Andy Seaborne edited comment on JENA-1188 at 6/6/16 1:55 PM:
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The test is necessary in some form - writing a dataset to Turtle (triples only)
only dumps the default graph. That is the situation I ran into and added the
test to stop that error. TriG nowadays prints the default graph Turtle style
(JENA-1179).
I prefer Osma's (1). Just move the test inside the "whole dataset" branch of
the {{if}}.
I agree that (2) is a but strange. It is at odds with the "dump" in "sdbdump".
If the user wants that, they can post-process the dump easily enough (N-quads,
strip the fourth field; TriG, Remove all "GRAPH ..."). Transformations, even
simple ones, are not the objective of the command.
was (Author: andy.seaborne):
The test is necessary in some form - writing a dataset to Turtle (triples only)
only dumps the default graph. That is the situation I ran into and added the
test to stop that error. TriG nowadays prints the default graph Turtle style
(JENA-1179).
I prefer Osma's (1). Just move the test inside the "whole dataset" branch of
the {{if}}.
I agree that (2) is a buit strange. It is at odds with the "dump" in
"sdbdump". If the user wants that, they can post-process the dump easily
enough, but transformations, even simple ones, are not the objective of the
command.
> sdbdump refuses to output a graph as Turtle
> -------------------------------------------
>
> Key: JENA-1188
> URL: https://issues.apache.org/jira/browse/JENA-1188
> Project: Apache Jena
> Issue Type: Bug
> Components: SDB
> Affects Versions: Jena 3.1.0
> Reporter: Osma Suominen
>
> I upgraded SDB to the 3.1.0 release version after running a snapshot build
> from early February. This broke a script that I use to periodically back up a
> SDB database:
> {noformat}
> sdbdump --sdb=$SDBROOT/sdb-yso.ttl \
> --graph=http://www.yso.fi/onto/yso/ \
> --out=TTL >$TTLFILE
> {noformat}
> This now gives the error
> {noformat}
> Not a 'quads' language (try 'N-Quads' or 'TriG')
> {noformat}
> The culprit seems to be this commit made on 8 Feb:
> https://github.com/apache/jena/commit/cb449523c83832ceb9cf525b4b1e1f382c49c16f
> I can see the point of requiring a quad-capable output format when dumping
> all graphs (though I'm not sure it should be a fatal error even in that
> case), but in my case, I asked for a single graph only. I think the check is
> overly strict.
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