AbstractFactory is inconsitent with current model
The AbstractFactory, in the list URI method is not handling every cases that the model enables.
This is true for new objects of the 1.2.1-SNAPSHOT (i.e. uris of Segment inside TrackSegment). But this is also true for other kind of constructions, such as ComposedQueries, SimilarityQueries, ResultSet and ComposedResources.