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 On Thu, Oct 31, 2013 at 8:45 PM, Joshua TAYLOR <joshuaaa...@gmail.com>wrote: > On Thu, Oct 31, 2013 at 10:47 AM, Eric Scott <eric.d.sc...@att.net> wrote: > > You could try something like this: > > > > select ?a?b?c?d?e > > where > > { > > ?g a :MyKindaGraph. > > graph ?g > > > > { > > ?r rdf:subject <Mr_X>. > > ?r rdf:predicate <isPresident>. > > ?r rdf:object <CountryZ>. > > ?r saidBy ?a. > > ?r saidOn ?b. > > ?r saidAt ?c. > > ?r confidence ?d. > > ?r comment ?e > > } > > } > > I think, though I could be wrong, that the point wasn't just to put > the triples _into_ a named graph, but to use a named graph to serve > _as_ the reified triple (or triples). E.g., > > graph ?g { <Mr_X> <isPresident> <CountryZ> } > ?g saidBy ?a ; ... ; comment ?e . > > This avoids needing three triples for each reified statement, and > makes the queries easier to write. It also makes it easier to provide > meta information about a collection of triples, rather than just a > single reified triple. > > //JT > -- > Joshua Taylor, http://www.cs.rpi.edu/~tayloj/ >