Separate or common version of the classes

In the next step, the SpecIF classes will be generated from the SpecIF vocabulary/ontology.

To decide:
1. A term (and thus a resulting class) gets an individual next revision, when an update is made.
2. All classes get an equal next revision = release tag, whenever a new set of classes is generated.

My preference is the first option.

@oalt : What do you think?