KERML_ — TransitionPerformance modeling pattern more general than needed, not aligned with SysML::TransitionUsage

Clause 9.2.10.1 (Transition Performances Overview) requires two connectors typed by associations, to constrain transitionLink and transitionLinkSource:

The Succession constrained by a TransitionPerformance is specified by a Connector between the Succession and its transitionStep, a unique Step typed by TransitionPerformance or a specialization of it, of the same Behavior as the Succession. This connector is
• typed by an Association defined to give a value to the transitionLink of TransitionPerformances,
• has connector end multiplicity 0..1 on the Succession end and 1 on the TransitionPerformance Step end.

The transitionStep above is also connected to the Succession's sourceFeature, because conditions on the Succession depend on each Occurrence of its sourceFeature separately, which TransitionPerformances identify as their transitionLinkSource. This connector is
• typed by an Association defined to give a value to the transitionLinkSource of TransitionPerformances.
• with connector end multiplicity 1 on both ends.

but

• succession could subset transitionStep.transitionLink (equivalent to a binding with optional multiplicity on succession end)

• bind succession's sourceFeature and its transitionStep.transitionLinkSource (1 to 1 end multiplicities)

giving the desired result without introducing new associations for each transitionStep. This would also align it with SysML's modeling pattern specified in TransitionUsage::checkTransitionUsageSuccessionBindingConnector and checkTransitionUsageSourceBindingConnector.

Align TransitionPerformance modeling pattern with SysML::TransitionUsage

This resolution removes the associations between Succession and Step (Succession::transitionStep, triggerStep, effectStep, and guardExpression), most of which aren't referred to in the specification and none of which are referred to by constraints other their derivations (also removed). The modeling patterns described in Transition Performance's overview are modified to align with those for SysML's TransitionUsage (BindingConnectors instead of other Associations).