built-in predicate
category_property/2¶
Description¶
category_property(Category, Property)
Enumerates, by backtracking, the properties associated with the defined categories. The valid properties are listed in the language grammar section on entity properties and described in the User Manual section on category properties.
Modes and number of proofs¶
category_property(?category_identifier, ?category_property) - zero_or_more
Errors¶
Category is neither a variable nor a valid category identifier:type_error(category_identifier, Category)Property is neither a variable nor a callable term:type_error(callable, Property)Property is a callable term but not a valid category property:domain_error(category_property, Property)Examples¶
% enumerate the properties of the core_messages built-in category:
| ?- category_property(core_messages, Property).
Property = source_data ;
Property = static ;
Property = built_in ;
...