On 11/09/15 15:48, Zen 98052 wrote:
If I want to pass additional data (in addition to triples pattern) in
SPARQL, does it mean I have to deal with quad? Or is there another
way?
The additional data can be a firm id, for example it only queries
data from that firm id partition (in our custom storage)
Thanks,
Z
Hi there - some background about your custom back-end storage would be
helpful.
I am unclear as to why namign the firm by it's URI is not what you ant.
{
<http://example/firm?id=123> ?p ?o
}
is all triples with <http://example/firm?id=123> as subject. Make
increasingly complicated patterns for cases where that links to other
related data.
The only points SPARQL accesses the data are in triple matching and
GRAPH ?g.
So you could use GRAPH:
GRAPH <http://example/firm?id=123> {
....
}
or even
GRAPH ?g { ... }
FILTER ( some condition on ?g )
But the target dataset for the query can be described with FROM (and
FROM NAMED) which gives you another place to set up the query
SELECT ...
FROM <http://example/firm?id=123>
WHERE {
...
}
(the last is the least flexible)
Andy
