AVOID "mixed" functional (behavioral) allocation levels! DO NOT Allocate from Usage level (Action) to Definition level (Block) or from Definition level (Activity) to usage level (part Property) - even if formally permitted in SysML.

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SysMLv1.x keywords

behavior allocation

MD:PartProperty

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Even if you see it elsewhere (and even in some spec figures) please avoid "mixed" level (a.k.a. "crossed" level) allocations completely under Webel Best Practice.

MagicDraw/Cameo: One can choose between 'usage' level or 'definition' level allocation modes on AllocateActivityPartition swimlanes. The setting always applies to all AllocateActivityPartition items in one Activity Diagram at once.

Relates to

Figure 15-7: Example of flow allocation from ObjectNode to FlowProperty

Functional allocation of an Activity (definition level) in a BDD with callouts

Functional allocation of a CallBehaviorAction (usage level) in an Activity Diagram to elements in a BDD

Allocation of a CallBehaviorActionAction to a PartProperty via an AllocateActivityPartition "swimlane"

Allocation via swimlanes in usage allocation mode - DOs and DON'Ts

Allocation via swimlanes in definition allocation mode - DOs and DON'Ts

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[SysML-1.6] Allocate is a dependency based on UML::Abstraction. It is a mechanism for associating elements of different types, or in different hierarchies, at an abstract level. Allocate is used for assessing user model consistency and directing future design ...

[SysML-1.6] It is expected that an «allocate» relationship between model elements is a precursor to a more concrete relationship between the elements, their properties, operations, attributes, or sub-classes.

[SysML-1.6] The Allocate stereotype specializes DirectedRelationshipPropertyPath to enable allocations to identify their sources and targets by a multi-level path of accessible properties from context blocks for the sources and targets.

[SysML-1.6] AllocateActivityPartition is used to depict an «allocate» relationship on an Activity diagram. The AllocateActivityPartition is a standard UML::ActivityPartition, with modified constraints...

[SysML-1.6] Note that the AllocateActivityPartition, if used in this manner, is unambiguously associated with behavior allocation.

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