Number[psor] and person[psor] not mentioned on https://universaldependencies.org/u/feat/

[JanOdijk]

The features Number[psor] and person[psor] are not mentioned on https://universaldependencies.org/u/feat/ though they are defined
See
https://universaldependencies.org/u/feat/Number-psor.html and
https://universaldependencies.org/u/feat/Person-psor.html

This makes me worry that there might even be more features not mentioned on https://universaldependencies.org/u/feat/

[dan-zeman]

Yes! None of the layered features have the "universal" status, so they are considered language-specific.

[JanOdijk]

Thanks. I understand that I can find language-specific features on https://universaldependencies.org/guidelines.html#language-specific-guidelines .

[dan-zeman]

You can also browse the list of all features and values used in the most recent UD release here.