Was playing around with SPARQL's grammar courtesy of Eric Prud'Hommeaux and
we checked what needed to be done to facilitate more concise queries against
remote endpoints.
Eric changed:
[9] DatasetClause ::= 'FROM' ( DefaultGraphClause |
NamedGraphClause | 'CONSTRUCT' ConstructTemplate DatasetClause*
WhereClause )
to allow
SELECT ?a ?b
FROM ( CONSTRUCT { ?d <b> ?b }
FROM <http://example.com/sparql?>
WHERE { ?b <b> ?d } )
WHERE { ?a <b> ?b }
The idea is that currently one has to do something like
SELECT ?a ?b
WHERE
{
GRAPH <http://example.com/sparql?query=CONSTRUCT%20%7B%20%3Fd
%20%3Cb%3E%20%3Fb%20%7D%20FROM%20%3Casdf%3E%20WHERE%20%7B%20%3Fb%20%
3Cb%3E%20%3Fd%20%7D%20&format=text%2Frdf%2Bn3>
{ ?b <b> ?d.}
{ ?a <b> ?b }
}
Which is somewhat less likely to be written.
-Alan
