Inverse context creation: meaning of (might be null) for an optional field

[ZLghkA]

Hello,

The inverse context creation indicates that a language and direction mappings of a term definition (both being optional strings) might be present and null, in 4.3.2, steps 3.13), 3.14) and 3.15). In the definition of a term definition, section 4.1, there are optional strings. Should they be documented as optional nullable strings (not present, null, or strings)? Are there other fields that may be null too?

Best regards,

Vivien