Hi Andy!
> Nowadays ARQ supports date/duration arithmetic (not ARQ 2.8.8) > > "2012-03-22"^^xsd:date + "-P30D"^^xsd:duration > ==> > "2012-02-21"^^xsd:date > > You may not need the custom function. > That's awesome! In which version was it available? From what I see, it doesn't work on jena-arq-2.9.0. > The use of a custom functions inside SERVICE isn't ideal. > That's a thing I do for limiting the number of results the service returns, as there's tens of million triples per service, ARQ would need lots of memory (for me, 16G or more) to join results. And, as the services are based on D2R, which is using ARQ 2.9.0, I still need the custom functions =/ I agree that it isn't ideal, as I need to add to the CP of the endpoints. And, as it's a different ARQ, I ended up with two versions of this functions, each compiled against one jena version! Thanks! dfcp > > > Andy > > > > > On 12/04/13 22:12, Diogo FC Patrao wrote: > >> Hello all, >> >> I'm trying to run a SPARQL query specifiying a custom function (that does >> date arithmetics). On ARQ 2.8.8, the following code worked perfectly: >> >> PREFIX : >> <http://www.cipe.accamargo.**org.br/ontologias/h2tc.owl#<http://www.cipe.accamargo.org.br/ontologias/h2tc.owl#> >> > >> PREFIX xmls: >> <http://www.w3.org/2001/**XMLSchema#<http://www.w3.org/2001/XMLSchema#> >> > >> >> select * { >> >> SERVICE <http://0.0.0.0:2023/sparql> { >> :patient1 :hasDocument ?docX . >> >> ?docX :documentType "PRESCRIPTION" . >> ?docX :documentDateOfCreation ?docDateX . >> FILTER ( xmls:date(?docDateX) > >> :xmls:date(<java:dateadd.lib.**pkgfor.arq.DateaddLibForARQ>("** >> 2012-03-22", >> "-P30D")) ) >> >> } >> } >> limit 10 >> >> However, when specifying this function using arq 2.10.1-snapshot (4/3) >> (recompiled the library and updated cp), it complains : >> >> 18:00:53 WARN Loader :: Class not found: >> dateadd.lib.pkgfor.arq.**DateaddLibForARQ >> 18:00:53 WARN exec :: URI >> <java:dateadd.lib.pkgfor.arq.**DateaddLibForARQ> has no registered >> function >> factory >> >> >> I could get the query working that way: >> >> select * { >> >> SERVICE <http://0.0.0.0:2023/sparql> { >> :patient1 :hasDocument ?docX . >> >> ?docX :documentType "PRESCRIPTION" . >> ?docX :documentDateOfCreation ?docDateX . >> BIND( <java:dateadd.lib.pkgfor.arq.** >> DateaddLibForARQ>("2012-03-22"**, >> "-P30D") as ?teste ) >> >> FILTER ( ?docDateX > ?teste ) >> >> } >> } >> limit 10 >> >> >> Thanks a lot! >> >> >> -- >> diogo patrão >> >> >
