Each image has an associated coordinate space tree. Each space within the coordinate space tree has a name. You can use these names
- to look up an existing space.
- to identify a space when creating a new space or renaming an existing one.
- to indicate which spaces exist and the parent/child relationships between them.
- to extract coordinate transformations between different spaces in the tree.
You can express the name of any nonroot space in three ways:
- as an individual nonqualified (NQ) name,
- as a fully-qualified (FQ) pathname through the tree, starting at the root space, or
- as a partially-qualified (PQ) pathname, starting from a user-supplied space.