public interface ItemId
ItemIdidentifies an item using a combination of unique ID and path. There are three basic forms of an ItemId. The following table shows each of the allowed combinations where an X in the column indicates that a value is set and a - indicates that the value is
|X||-||The item can be identified with a unique ID. In most cases such an item is also mix:referenceable but there is no restriction in that respect. An SPI implementation may also use a unique ID to identify non-referenceable nodes. Whether a node is referenceable is purely governed by its node type or the assigned mixin types. Note, that the format of the ID it is left to the implementation.|
|-||X||The item can not be identified with a unique ID and none of its ancestors can be identified with a unique ID. The item is identified by an absolute path.|
|X||X||The item can not be identified with a unique ID but one of its ancestors
ItemIds should be considered equal if both the unique part
and the path part are equal AND if they denote the same
ItemIdidentifies a node; otherwise
nullif the identified item nor any of its ancestors can be identified with a uniqueID.
nullif this item can be identified solely with a uniqueID.
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