omny includes a Manchester OWL Syntax PEG grammar and test fixtures derived
from owlapy (https://github.com/dice-group/owlapy), licensed under the MIT License,
Copyright (c) 2024 Caglar Demir. The original MIT license text is reproduced in
licenses/owlapy-LICENSE.txt.

Grammar policy
--------------
omny/grammar.py was originally vendored verbatim from owlapy. One intentional
divergence has been introduced and is recorded here:

  * Facet-restriction separator (PR #15): the upstream owlapy grammar used the
    DL connector ``⊓`` between facet restrictions. The W3C OWL 2 Manchester
    syntax specifies ``,`` instead, and real-world ontologies (e.g. SIO,
    OBI) use ``,``. omny accepts both. See
    https://www.w3.org/TR/owl2-manchester-syntax/#Datatype_Restrictions

Future divergences from upstream must be recorded in this section so the
"vendored verbatim" claim stays accurate.
