[sc34wg3] Some more inconsistencies in the tmcl schema

[Michael Quaas]

I think I've found some more.

6. There is a unique-occurrence-constraint defined (line 212)  but never 
used. Otherwise in the constrained-statement role-combination 
definitions is a unique-value-constraint used (lines 237+239) which is 
not defined. Guess the unique-occurrence-constraint should be renamed in 
unique-value-constraint, as it is allowed to constrain occurrence-types 
and name-types.

7. In the constrained-statement role-combination definitions is an 
other-role-constraint used (line 239) but not defined in the schema.

Michael Quaas