:- protocol(class_hierarchyp,
	extends(hierarchyp)).


	:- info([
		version is 1.0,
		author is 'Paulo Moura',
		date is 2000/7/24,
		comment is 'Class hierarchy protocol.']).


	:- public(class/1).

	:- mode(class(?object), zero_or_more).

	:- info(class/1, [
		comment is 'Returns, by backtracking, all object classes.',
		argnames is ['Class']]).


	:- public(classes/1).

	:- mode(classes(-list), one).

	:- info(classes/1, [
		comment is 'List of all object classes.',
		argnames is ['Classes']]).


	:- public(instance/1).

	:- mode(instance(?object), zero_or_more).

	:- info(instance/1, [
		comment is 'Returns, by backtracking, all class instances.',
		argnames is ['Instance']]).


	:- public(instances/1).

	:- mode(instances(-list), one).

	:- info(instances/1, [
		comment is 'List of all class instances.',
		argnames is ['Instances']]).


	:- public(subclass/1).

	:- mode(subclass(?object), zero_or_more).

	:- info(subclass/1, [
		comment is 'Returns, by backtracking, all class subclasses.',
		argnames is ['Subclass']]).


	:- public(subclasses/1).

	:- mode(subclasses(-list), one).

	:- info(subclasses/1, [
		comment is 'List of all class subclasses.',
		argnames is ['Subclasses']]).


	:- public(superclass/1).

	:- mode(superclass(?object), zero_or_more).

	:- info(superclass/1, [
		comment is 'Returns, by backtracking, all class superclasses.',
		argnames is ['Superclass']]).


	:- public(superclasses/1).

	:- mode(superclasses(-list), one).

	:- info(superclasses/1, [
		comment is 'List of all class superclasses.',
		argnames is ['Superclasses']]).


	:- public(leaf_instance/1).

	:- mode(leaf_instance(?object), zero_or_more).

	:- info(leaf_instance/1, [
		comment is 'Returns, by backtracking, all class leaf instances.',
		argnames is ['Leaf']]).


	:- public(leaf_instances/1).

	:- mode(leaf_instances(-list), one).

	:- info(leaf_instances/1, [
		comment is 'List of all class leaf instances.',
		argnames is ['Leaves']]).


	:- public(leaf_class/1).

	:- mode(leaf_class(?object), zero_or_more).

	:- info(leaf_class/1, [
		comment is 'Returns, by backtracking, all class leaf subclasses.',
		argnames is ['Leaf']]).


	:- public(leaf_classes/1).

	:- mode(leaf_classes(-list), one).

	:- info(leaf_classes/1, [
		comment is 'List of all class leaf leaf subclasses.',
		argnames is ['Leaves']]).


	:- public(descendant_instance/1).

	:- mode(descendant_instance(?object), zero_or_more).

	:- info(descendant_instance/1, [
		comment is 'Returns, by backtracking, all class descendant instances.',
		argnames is ['Descendant']]).


	:- public(descendant_instances/1).

	:- mode(descendant_instances(-list), one).

	:- info(descendant_instances/1, [
		comment is 'List of all class descendant instances.',
		argnames is ['Descendants']]).


	:- public(descendant_class/1).

	:- mode(descendant_class(?object), zero_or_more).

	:- info(descendant_class/1, [
		comment is 'Returns, by backtracking, all class descendant subclasses.',
		argnames is ['Descendant']]).


	:- public(descendant_classes/1).

	:- mode(descendant_classes(-list), one).

	:- info(descendant_classes/1, [
		comment is 'List of all class descendant subclasses.',
		argnames is ['Descendants']]).


:- end_protocol.