In many cases it is desireable to classify an annotation indpendant of the type of source that it came from. For example, an annotation may refer to experimental evidence from a source such as a paper or refer to evidence from a paper that is anecdotal.

The module should allow for the selection of a vocabulary for this purpose in its administrative interface. The annotation form should provide a term selection widget.

Queries for annotations should be returned ordered by the weight of their associated terms.

At the theme level, the annotations could then be grouped according to the vocabulary term associated with them.