I just noticed that a work-around would be to create a variable in the
WHERE clause, for example
INSERT {
GRAPH <http://kaiko.getalp.org/gbdlex/bridges/testBridge> {
?bnode a gbdlex:axie .
?bnode gbdlex:link ?this .
}.
}
WHERE {
?this a gbdlex:wordSense .
BIND (BNODE() AS ?bnode) .
}
This at least should keep you going with 4.1 until the original issue is
fixed in 4.2.
HTH
Holger
On 2/21/2013 10:56, Holger Knublauch wrote:
Hi David,
yes you are unfortunately correct: there is a bug in all versions
including 4.1 that doesn't handle bnodes in GRAPHs inside of
INSERT/DELETE templates correctly. I had fixed this a few weeks ago,
so it's already corrected in the published SPIN API 1.3.0. For TBC I
am not aware of a work-around except waiting for the next release
which is scheduled to go into beta in mid March.
FWIW here is the change log entry:
- Bug fix: INSERT { GRAPH { _:b0 ... was incorrectly rendered as
INSERT { GRAPH { [] ...
Thanks
Holger
On 2/21/2013 7:15, David Rouquet wrote:
Hi everyone,
I'm having troubles with a SPIN rule that should insert triples with
blank nodes in a given graph.
I'm not sure if it comes from a misunderstanding I have using bnodes
or a bug in TopBraid Composer.
When I validate the rule in TBC, it sometimes automatically modify
the syntax. This is usually OK as the modified rule should be
equivalent to the one I entered. However, when I specify the graph
where the triples have to be inserted, the modified syntax imposed by
TBC is not equivalent to the one I entered.
For instance, when I don't specify the graph like in the following
query, everything is fine (the query is not modified when I validate) :
INSERT {
_:b0 a gbdlex:axie .
_:b0 gbdlex:link ?this .
}
WHERE {
?this a gbdlex:wordSense .
}
But with the same query where I specify the graph where the triples
have to be inserted :
INSERT {
GRAPH <http://kaiko.getalp.org/gbdlex/bridges/testBridge> {
_:b0 a gbdlex:axie .
_:b0 gbdlex:link ?this .
}.
}
WHERE {
?this a gbdlex:wordSense .
}
TBC rewrite the rule in the following form, that is not equivalent,
when I validate (press enter) :
INSERT {
GRAPH <http://kaiko.getalp.org/gbdlex/bridges/testBridge> {
[] a gbdlex:axie .
[] gbdlex:link ?this .
}.
}
WHERE {
?this a gbdlex:wordSense .
}
To the best of my understanding, the two occurrences of the shorten
form [] are bound to two different bnodes whereas I need them to
represent the same bnode (as specified using the _:b0 syntax).
I tried other short syntaxes for bnodes as :
[] a gbdlex:axie ; gbdlex:link ?this .
or
[a gbdlex:axie] gbdlex:link ?this .
but TBC always rewrite the rule in the same non equivalent form.
I know that TBC automatically rewrite the rules that use deprecated
SPARQL syntaxes so I suspected a bug in this rewriting process.
Any help would be much appreciated !
Best
-----
David
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