Bids schema spec does not match the schema

[AugustijnVrolijk]

Hi All,

I've been writing an interpreter for the bids schema expressions and have been testing it using: src/schema/meta/expression_tests.yaml. I've noticed that these tests (under v1.10 and master) do not correspond with the result specification shown on: https://bidsschematools.readthedocs.io/en/latest/description.html#the-special-value-null

Which of these is correct?

Thanks for your time.