UMLTP2 — TestLog.instanceOf should allow for many TestLogStructures

Structural aspects other than the predefined ones for the stereotype TestLog can be added by means of a <<TestLogStructure>> Classifier. Currently, UTP restricts a TestLog to be classified by at most one TestLogStructure. But it may easily happen that a TestLog is supposed to capture the information form more than just one <<TestLogStructure>> Classifier. Therefore, the multiplicity of TestLog.instanceOf should be 0..*.

Allow for multiple <<TestLogStructure>> Classifiers

The abstract stereotype <<TestLog>> has a derived association to TestLogStructure. It is derived from the set of <<TestLogStructure>>Classifiers of the underlying InstanceSpecification (see InstanceSpecification.classifier). It should be possible to have more than just one <<TestLogStructure>>Classifier for any concrete <<TestLog>> to remain flexible and extendible for user needs.

This issue will be resolved in the course of resolving issue UMLTP2-27 with proposal UMLTP2-36.