SYSML21 — Inconsistent Usage Representation in Parameters Compartment

Currently, the usage appearance in the ‘parameters’ compartment is defined in the “8.2.3.17 Actions Graphical Notation” chapter as follows:

parameters-compartment-element = el-prefix? FeatureDirection UsageDeclaration ValueOrFlowPart? DefinitionBodyItem*

This is not consistent with other compartments that represent elements which can declare a direction (it includes only the ‘direction’ modifier but omits others), such as items, parts, and attributes:

items-compartment-element = el-prefix? OccurrenceUsagePrefix usage-cp
parts-compartment-element = el-prefix? OccurrenceUsagePrefix usage-cp
attributes-compartment-element = el-prefix? UsagePrefix usage-cp

To ensure consistency, it should be aligned with these definitions, as shown below:

parameters-compartment-element = el-prefix? OccurrenceUsagePrefix usage-cp