All names are up for grabs.
The themes are added to the scope of the topic map objects defined by the identified element and all of its sub-elements. If the locator points to a whole document, then the themes are added to the root element of the document and all of its sub-elements. This description is way more complex than should ever appear in the specification. This is to cater for the fact that we have a number of choices to make and we need some way of putting a handle on each of the issues for a clean discussion. Once the discussion is had and the decision is made, the need for some of these special handles goes away and the definition of the other handles becomes far less complex.