Communication in Context
As the reader has already probably figured out, the structure of Communication makes it clear that it is, in fact, a kind of Activity. This is now revealed officially in Figure 14-6. That is, Communication is a sub-type of Activity, just as Communication Procedure is a sub-type of Activity Specification.
It therefore follows that Communications Role is but a sub-type of Activity Role, and Authorship is a sub-type of Information Resource Role.
And of course, brochure design, commercial video, and commercial photograph, can now take their place as sub-types of information resource definition.
Figure 14-6: Communications ...