UML14 — Changes to figure 15 and description of ClassifierRole on page 82

Summary: Figure 15 on page 81 shows that a ClassifierRole has a single base Classifier.
However, an Instance may have multiple Classifiers (see Figure 14 on p. 67).
Indeed, the Notation Guide gives a notation for showing an Object having
multiple Classes (on p. 46) and maps this notation to an Object within an
object or class diagram, but to a ClassifierRole on a collaboration diagram.
To support this notation, and to be consistant with the ability of Instances
to have multiple Classifiers, a ClassifierRole should be able to have
multiple base Classifiers.

This requires a change to the multiplicity of the appropriate association
in Figure 15 as well as updates to the ClassifierRole description on p. 82
and the well-formedness rules for ClassifierRile on p. 84. (Actually, I think
only the words in the WF rules need to change – the current OCL rules will
accomodate the change in multiplicity of "base".)

Fixed in UML 1.3.