- # ID used as a HTML unique ID and in file names.
- #
- # **Must** match the following (POSIX ERE) regular expression:
- #
- # ~~~POSIX ERE
- # ^[A-Za-z_][A-Za-z0-9._-]*$
- # ~~~
- #
- # That way, the ID is always a valid URI component and a valid XML name.
- fun nitdoc_id: String is abstract
-