New rule for creating new Device definitions

We need to define a rule in TS-0023 (and perhaps in a "best practice" page in the online documentation) how to create a new Device definition for a Device. At least the following possibilities are open

• Create a new Device definition with a new name: when there are no or not many similarities to an existing Device definition
• Update an existing Device definition: when the new Device definition is very similar to an existing Device definition, and when the new Device definition would only add optional ModuleClasses.

With SDT 4, where Device inheritance is supported, there is another choice:

• Inherit from a similar Device, and add new and remove not wanted ModuleClasses.