Lock down the empty standalone promotion of anonymous atoms

[jviotti]

Signed-off-by: Juan Cruz Viotti jv@jviotti.com

[augmentcode]

🤖 Augment PR Summary

Summary: This PR tightens test expectations around RDF generation for “anonymous atom” inputs.

Changes:

• Updates many schema fixture files under test/schemas/** to explicitly assert an empty RDF output for certain valid cases by adding "rdf": [].
• Applies this mainly to baseline/edge “atom” values (e.g., 0, 0.0, and empty strings), where RDF emission should be empty.
• Covers a wide range of domains (SI units, IEEE floats, IETF encodings/URIs/GeoJSON, ISO types, W3C XML Schema primitives, etc.).

Why: Makes RDF-related behavior explicit in the test suite, helping prevent regressions where empty RDF outputs might incorrectly “promote” standalone anonymous atoms.

Technical Notes: The jsonschema test runner already supports an rdf expectation (including empty arrays), so these fixtures now validate both schema validity and RDF output shape for the selected cases.

_{🤖 Was this summary useful? React with 👍 or 👎}

[augmentcode]

Review completed. No suggestions at this time.

Comment augment review to trigger a new review at any time.