I have a standard block of SPARQL prefixes that I use in some of my code, and I started getting test failures when I tried to update from rdflib 6.1.1 to rdflib 6.2.0. I noticed that the problem seems to be that somehow, support for multiple prefixes that resolve to the same URI seems to have been dropped.
Example block at the beginning of a SPARQL query:
PREFIX foo: <http://example.com#>
PREFIX bar: <http://example.com#>
The above should, as far as I know, be supported - but in rdflib 6.2.0, the foo: prefix will not be recognized when used in the query - and in fact, during parsing of the query, the foo: prefix is deleted.
The issue seems to be somewhere in rdfllib.namespace.__init__.py, in NamespaceManager.bind() - but I can't quite pin down what change is causing this new issue.
I do see this comment in the code, which was present in 6.1.1 but maybe it wasn't working as described?
# Check if the bound_namespace contains a URI
# and if so convert it into a URIRef for comparison
# This is to prevent duplicate namespaces with the
# same URI
however, if I correctly understand the intent behind that comment, it seems problematic - there is nothing wrong (as far as I know?) with multiple prefixes for the same URI in SPARQL.
aucampia, sirish-eai, severin-lemaignan, lsharma-202 and white-geckoaucampia
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