On 20/07/2019 21:18, Andy Seaborne wrote:
Hi olivier,
The documentation is at:
http://jena.staging.apache.org/documentation/query/construct-quad.html
Actually:
https://jena.apache.org/documentation/query/construct-quad.html
(browser autocomplete! the other link is the staging area, not the
published area)
This is an extension - put the query in a file with extension ".arq", or
set the syntax to Syntax.syntaxARQ.
The default for .rq and the API is SPARQL 1.1
The default for Fuseki is ARQ-extened syntax.
Andy
On 19/07/2019 18:06, Olivier Dameron wrote:
Hello,
Il would like to create a named graph from a CONSTRUCT query.
The page
https://jena.apache.org/documentation/query/construct-quad.html
says that it is supported since jena-3.0.1. I am using 3.12.0.
I can make the CONSTRUCT clause work without a named graph, but adding
one in the construct leads to an error (cf. below)
This seems to be a topics of interest
https://github.com/w3c/sparql-12/issues/31
The stackoverflow page
https://stackoverflow.com/questions/18345908/construct-into-a-named-graph
gives a cumbersome alternative . The github issue mentions jena as a
working implementation. What am I doing wrong?
Thank you!
olivier
${JENA_HOME}/bin/sparql --version
Jena: VERSION: 3.12.0
Jena: BUILD_DATE: 2019-05-27T16:07:27+0000
cat data.ttl
@prefix : <http://www.example.com/> .
:a :r1 :b .
:c :r1 :b .
:d :r1 :e .
cat constructNamedGraph.rq
PREFIX : <http://www.example.com/>
CONSTRUCT {
GRAPH :g {
?s :rel2 ?o .
}
}
WHERE {
?s :r1 ?o .
}
${JENA_HOME}/bin/sparql --data=./data.ttl
--query=./constructNamedGraph.rq
Encountered " "graph" "GRAPH "" at line 4, column 3.
Was expecting one of:
<IRIref> ...
<PNAME_NS> ...
<PNAME_LN> ...
