It appears that I was still using 4.2.2 of rdflib and the bug (whatever it was) was fixed in 5.0.0 which I have upgraded to.
On Mon, Jun 8, 2020 at 9:49 AM James Hudson <jameshudson3...@gmail.com> wrote: > I was hoping to get some quick attention on this as this appears to be a > serious issue with RDFLib. If someone could confirm that I have found a > bug, that would be helpful. > > I submitted the bug report at https://github.com/RDFLib/rdflib/issues/1113 > > > ``` > import rdflib > from pprint import pprint > > > data = """ > @prefix ex: <http://example.org/> . > @prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> . > @prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> . > > > ex:CCCC a rdfs:Class ; > rdfs:subClassOf ex:AAAA . > > > ex:DDDD rdfs:subClassOf ex:BBBB, > ex:AAAA . > """ > > > g = rdflib.Graph().parse( data = data, format = 'ttl' ) > > > # print( f"{g.serialize( format = 'ttl' ).decode( 'utf8' )}" ) > > > query = """ > PREFIX sch: <http://schema.org/> > PREFIX rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> > PREFIX rdfs: <http://www.w3.org/2000/01/rdf-schema#> > > SELECT ?class ?subclass > WHERE { > ?class rdfs:subClassOf+ ?subclass . > > } > ORDER BY ?class ?subclass > """ > > > qres = g.query( query ) > > > for row in qres: > > aclass = str( row['class'] ) > subclass = str( row['subclass'] ) > print( f"{aclass:30s} {subclass:50s}" ) > ``` > > > This outputs: > > ``` > http://example.org/CCCC http://example.org/AAAA > > http://example.org/CCCC http://example.org/BBBB > > http://example.org/DDDD http://example.org/AAAA > > http://example.org/DDDD http://example.org/BBBB > ``` > > > The output declares there is a subClassOf path from CCCC to BBBB and there > clearly is not. > > I downloaded a SPARQL playground from http://sparql-playground.sib.swiss > which is trivial to get up and running on a local machine and tried the > same data an query. The results were: > > ``` > <http://example.org/CCCC> <http://example.org/AAAA> > <http://example.org/DDDD> <http://example.org/AAAA> > <http://example.org/DDDD> <http://example.org/BBBB> > ``` > > > which is *exactly* what one expects. > > -- > http://github.com/RDFLib > --- > You received this message because you are subscribed to the Google Groups > "rdflib-dev" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to rdflib-dev+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/rdflib-dev/7dc69ed6-8607-492b-9f23-1797dc01264do%40googlegroups.com > <https://groups.google.com/d/msgid/rdflib-dev/7dc69ed6-8607-492b-9f23-1797dc01264do%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- http://github.com/RDFLib --- You received this message because you are subscribed to the Google Groups "rdflib-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to rdflib-dev+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/rdflib-dev/CAEUVO9FKjWq_o3oQPiOkPZWTf%2Bcs_K201ZFcFwUjayg%2Bz8A39A%40mail.gmail.com.
