On Thu, Oct 31, 2013 at 11:17 AM, Maria Jackson
<[email protected]> wrote:
> select ?x ?a ?b ?c ?d ?e ?f where {
> graph ?r {
> ?x ?y <CountryZ>
> }
> graph ?r1{
> ?x ?y <CountryZ1>
> }
> ?r <saidBy> Tia ;
>
> <saidOn> ?b ;
> <saidAt> ?c ;
> <confidence> ?d ;
> <comment> ?e .
> ?r1 <saidBy> Astrid.
> }
> Is the above query to retrieve a person who is linked to two different
> countries correct?
>
> I am just curious as to whether it is syntactically accepted by Jena
There's a query validator at sparql.org that's based on Jena [1]. If
you copy your query into it, it says there's a syntax error at "Tia",
which makes sense, because it's not a prefixed name or an absolute
IRI. (This is why I've been wrapping everything in angle brackets.)
We can clean it up a a bit and get the following valid (and slightly
better formatted) query:
select ?x ?a ?b ?c ?d ?e ?f where {
graph ?r {
?x ?y <CountryZ>
}
graph ?r1{
?x ?y <CountryZ1>
}
?r <saidBy> <Tia> ;
<saidOn> ?b ;
<saidAt> ?c ;
<confidence> ?d ;
<comment> ?e .
?r1 <saidBy> <Astrid>.
}
//JT
[1] http://sparql.org/query-validator.html
--
Joshua Taylor, http://www.cs.rpi.edu/~tayloj/
