Possibly something similar to Python's docstrings; it should include both a way for defining attributes of objects, functions, etc. and easily retrieving this data (and possibly transforming it into another format, though this might be outside of the scope of a built-in feature).
Possibly something similar to Python's docstrings; it should include both a way for defining attributes of objects, functions, etc. and easily retrieving this data (and possibly transforming it into another format, though this might be outside of the scope of a built-in feature).