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3.4. Sequencing Rule Description
Figure 3.4a: Sequencing Rule Conditions and Actions
IMS SS employs a rule-based sequencing model. A set of zero or more sequencing rules can be applied to an activity and the rules are evaluated at specified times during various sequencing behaviors (refer to Appendix C: Sequencing Behavior Pseudo Code). Each sequencing rule consists of a set of conditions and a corresponding action. The conditions are evaluated using tracking information (refer to Section 4.2: Tracking Model) associated with the activity. The behavior associated with the rule’s action is performed if the rule’s condition-set evaluates to True. Figure 3.4a depicts the structure (if [condition_set] then [action]) of a sequencing rule.