arne-bdt commented on issue #2808:
URL: https://github.com/apache/jena/issues/2808#issuecomment-2444955543
@afs Sorry, I don´t understand parts of your comment.
> The datatype registry provides the unique references. It's an open-ended
enum.
--> What I understood: It should stay the way it is. By referece is fine,
due to the registry.
> LiteralLabelFactory` should not be considered application facing API. It's
in impl.
--> What I understood: I did not choose a valid example.
>> uniqueness isn’t defined by the URI
--> Where does this citation come from?
> That's contract for RDF datatypes.
--> The issue is about `RDFDatatypes`. Does this mean: The contract for RDF
datatypes is that it´s uniqueness is not defined by the URI? Or is it?
--> Since the URI is the unique key for the datatype registry where due to
reference equality, all existing datatypes have to be registered, then all
datatypes must have a unique URI. Or am I mistaken?
> I think chaos will result if "same URI, different class". It will be lost
on printing and storing in a database.
--> I agree, that would be ugly.
> Maybe define equals and hashCode as final.
--> Yeah... but with which kind of implementation? By reference or compare
by URI only?
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