A.5. Target Information Viewpoint
The TRRS information viewpoint comprises a set of UML class models. The information viewpoint identifies the key concepts that comprise the persistent state of the TRRS system.
Figure A.2 is a UML diagram showing interoperability relationships between COTS products. Conformance Statements (Figure A.3) are vendor assurances of product conformance to standards. Interoperability Statements are a similar concept, except that pairs of vendors assure mutual product compatibility. Interoperability Test Reports contain test results from multiproduct interoperability testing. Interoperability Products are specific COTS solutions for multivendor compatibility. Experience Reports are documented case studies about successful product integration experiences. Together, these are the key document types stored in the TRRS database.
Figure A.2. UML for Product Information
Figure A.3. UML for Supplier Information
An important tradeoff in UML modeling concerns the number of concepts on each diagram. As shown in Figures A.2 and A.3, simpler UML diagrams are easier to understand because they portray a handful of closely related concepts. Simple UML diagrams can be combined to portray larger sets of concepts on fewer pages. When combined, the technical meaning does not change, but the understandability varies. Too many simple diagrams can be just as hard to understand as too few complex diagrams.