On 20/08/14 22:44, Ruben Verborgh wrote:
Hi Andy,
Is it a good idea for a parser to do this in general?
Probably!
One exception I noted:
SELECT ?title ?price
{ ?x ns:price ?p .
?x ns:discount ?discount
BIND (?p*(1-?discount) AS ?price)
FILTER(?price < 20)
?x dc:title ?title .
}
According to the spec,
“BIND ends the basic graph pattern” [1],
so here we probably don't want to bring the BGPs together?
Correct - adjacent triple patterns and ones separated by FILTER merge
together.
Are there any other cases like this?
BIND/OPTIONAL and the rest end the BGP and a new one starts.
Andy
Thanks,
Ruben
[1] http://www.w3.org/TR/sparql11-query/#assignment
