jquery - How can I reuse the result of a SPARQL query to another query? -

for example have query

select ?x {?x :has_input "z"} 

then want use result/s of ?x object query

select ?y {?y :uses "x"} 

any ideas how achieve that? in advance

for sake of example, let's define data:

@prefix : <http://example.org/> .  :node0 :has_input "w", "z" . :node1 :has_input "x", "y" . :node2 :has_input "y", "z" . :node3 :uses :node2 . :node4 :uses :node1 . 

based on data, , specifying particular api (because didn't), you've got few sparql level options. first combining queries, easy enough in case:

prefix : <http://example.org/>  select ?y {    ?x :has_input "z" .   ?y :uses ?x . }  $ arq --data data.n3 --query combined-query.sparql  ---------- | y      | ========== | :node3 | ---------- 

another option use subquery

prefix : <http://example.org/>  select ?y {    {     select ?x {        ?x :has_input "z" .     }   }   ?y :uses ?x . }   $ arq --data data.n3 --query subquery.sparql ---------- | y      | ========== | :node3 | ---------- 

a third, may need, if have execute queries separately, execute query finds values ?x you, , execute query finds ?y, ?x values embedded values. first query looks , returns:

prefix : <http://example.org/>  select ?x {    ?x :has_input "z" . }  $ arq --data data.n3 --query xquery.sparql ---------- | x      | ========== | :node2 | | :node0 | ---------- 

then, based on values, create query ?y:

prefix : <http://example.org/>  select ?y {    values ?x { :node2 :node0 }   ?y :uses ?x . }  $ arq --data data.n3 --query yquery.sparql ---------- | y      | ========== | :node3 | ----------