Thanks Dave, interesting that RDF 1.1 calls out duration but SPARQL 1.1 does not. This could be related to SPARQL 1.1 being released before RDF 1.1
On Nov 19, 2014, at 3:20 AM, Dave Reynolds <[email protected]> wrote: > On 19/11/14 05:41, Arthur Keen wrote: >> When comparing 28 days to 1 month and 365 days to 1 year in Fuseki 1.1.1 >> >> SELECT ("P28D"^^<http://www.w3.org/2001/XMLSchema#duration> >> ="P1M"^^<http://www.w3.org/2001/XMLSchema#duration> as ?same) {} >> -------- >> | same | >> ======== >> | true | >> -------- >> SELECT ("P365D"^^<http://www.w3.org/2001/XMLSchema#duration> >> ="P1Y"^^<http://www.w3.org/2001/XMLSchema#duration> as ?same) {} >> -------- >> | same | >> ======== >> | true | >> -------- >> Shouldn't this be indeterminate in both cases? > > xsd:duration was not a supported datatype in RDF 1.0 and isn't included in > the SPARQL 1.1 specification [1] so I wouldn't rely on behaviour here. > > SPARQL 1.1 does allow = to be extended to other datatypes but as far as I can > see it doesn't specify how indeterminate values should be handled. > > I see that RDF 1.1 does list xsd:duration as a supported datatype (!) which > seems like a terrible idea, no idea why they did that. > > I can't speak for whether there is any intention for ARQ to support > xsd:duration fully. > > Dave > > [1] http://www.w3.org/TR/sparql11-query/#OperatorMapping
