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Parent Package: archetyped
Class PATHABLE{Abstract}

Direct Subclassifiers:
       EVENT_CONTEXT, ISM_TRANSITION, LOCATABLE, INSTRUCTION_DETAILS
Abstract parent of all classes whose instances are reachable by paths, and which know how to locate child object by paths. The parent feature may be implemented as a function or attribute.

Operations
Signature	Constraints	Documentation
item_at_path(a_path : String) : Any	post: Result <> Void pre: path <>Void and valid_path(a_path)	The item at a path (relative to this item); only valid for unique paths, i.e. paths that resolve to a single item.
items_at_path(a_path : String) : List<Any>	pre: path <>Void and not path_unique(a_path) post: Result <> Void	List of items corresponding to a non-unique path path.
parent() : PATHABLE		Parent of this node in compositional hierarchy.
path_exists(a_path : String) : Boolean		True if the path exists in the data with respect to the current item.
path_of_item(a_loc : PATHABLE) : String	pre: an_item <> Void	The path to an item relative to the root of this archetyped structure.
path_unique(a_path : String) : Boolean	pre: a_path <> Void and path_exists(a_path)	True if the path corresponds to a single item in the data.