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duplicate bnode when parsing rdf:Collection in specific order #392

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ericprud opened this issue Feb 14, 2022 · 0 comments
Open

duplicate bnode when parsing rdf:Collection in specific order #392

ericprud opened this issue Feb 14, 2022 · 0 comments

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@ericprud
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An optimally-ordered list of N-Triples:

_:b2 <http://www.w3.org/ns/shex#valueExpr> _:b3 .
_:b3 <http://www.w3.org/ns/shex#values> _:b9 .
_:b9 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> "p1" .
_:b9 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> _:b10 .
_:b10 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> "c" .
_:b10 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> <http://www.w3.org/1999/02/22-rdf-syntax-ns#nil> .

is recognized as an rdf:Collection:

[] ns0:valueExpr [ ns0:values (
     "p1"
     "c"
   ) ] .

but moving the _:b10 triples to the top:

_:b10 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> "c" .
_:b10 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> <http://www.w3.org/1999/02/22-rdf-syntax-ns#nil> .
_:b2 <http://www.w3.org/ns/shex#valueExpr> _:b3 .
_:b3 <http://www.w3.org/ns/shex#values> _:b9 .
_:b9 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> "p1" .
_:b9 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> _:b10 .

yields a duplicate reference into the list:

_:genid1
  rdf:first "c" ;
  rdf:rest ( ) .

[] ns0:valueExpr [ ns0:values (
     "p1"
     "c"
   ) ] .
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@ericprud