pySHACL RDFLib 7.3+ Compatibility: Deprecation of `default_context` and `Dataset.identifier`

[torsknod2]

Summary

pySHACL currently triggers deprecation warnings with modern RDFLib versions because internal code still uses Dataset APIs that RDFLib deprecated in 7.3.0.

Root Cause

RDFLib/rdflib#3264 deprecated the following things:

• Dataset.contexts
• Dataset.default_context
• Dataset.identifier

This was first included in https://github.com/RDFLib/rdflib/releases/tag/7.3.0 according to https://rdflib.readthedocs.io/en/latest/changelog.

Change Request

• Change rdflib dependency in pyproject.toml to at least 7.3.0
• Dataset.contexts -> Dataset.graphs
• Dataset.default_context -> Dataset.default_graph

Open points:

• Dataset.identifier (deprecated)

I did not check what all gets actually used, but only had myself some warnings in a "private" project.