Hi,
The result of a CONSTRUCT is an RDF graph and the template must be a
"triples template"
[10] ConstructQuery ::=
'CONSTRUCT' ... 'WHERE' '{' TriplesTemplate? '}' ...
and
[52] TriplesTemplate ::=
TriplesSameSubject ( '.' TriplesTemplate? )?
No GRAPH.
Jena accepts CONSTRUCT WHERE { GRAPH .... }
in extended mode (Syntax.syntaxARQ) and returns a Dataset.
Andy
On 16/02/17 14:52, Jean-Marc Vanel wrote:
Hi
I tested with 3.2.0.
The short form for the CONSTRUCT query
https://www.w3.org/TR/sparql11-query/#constructWhere
works, at least syntactically ( I have nothing in the default graph in my
TDB ) :
CONSTRUCT WHERE
{ ?X ?P ?O . }
LIMIT 10
But adding GRAPH pattern gives a synyax error:
CONSTRUCT WHERE {
GRAPH ?G {
?X ?P ?O .
}
} LIMIT 10
Which does not occur e.g. with Virtuoso.
org.apache.jena.query.QueryParseException: Encountered " "graph" "GRAPH ""
at line 2, column 1.
Was expecting one of:
<IRIref> ...
<PNAME_NS> ...
<PNAME_LN> ...
<BLANK_NODE_LABEL> ...
<VAR1> ...
<VAR2> ...
"true" ...
"false" ...
<INTEGER> ...
<DECIMAL> ...
<DOUBLE> ...
<INTEGER_POSITIVE> ...
<DECIMAL_POSITIVE> ...
<DOUBLE_POSITIVE> ...
<INTEGER_NEGATIVE> ...
<DECIMAL_NEGATIVE> ...
<DOUBLE_NEGATIVE> ...
<STRING_LITERAL1> ...
<STRING_LITERAL2> ...
<STRING_LITERAL_LONG1> ...
<STRING_LITERAL_LONG2> ...
"(" ...
<NIL> ...
"}" ...
"[" ...
<ANON> ...
at
org.apache.jena.sparql.lang.ParserSPARQL11.perform(ParserSPARQL11.java:100)
