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Associations can be used between activities and classifiers (blocks or value types) that are the type of object nodes, variables, or parameters in the activity, as shown in Figure 11-5.

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Figure D.37 - Decomposition of “Accelerate” Function (Activity and Object Flow Breakdown)
Figure 11-5: Block definition diagram with activities as blocks associated with types of object nodes, variables, and parameter
SysMLv1: A part Property or reference Property is not necessarily a 'memberEnd' or 'ownedEnd' of an Association ('association' or 'owningAssociation'). But an Association always as at least 2 'memberEnd' Properties. [With some MagicDraw/Cameo tool tips.]
Source
OMG Systems Modeling Language (SysML) 1.6
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About Object Management Group copyright in text extracts quoted from OMG specifications for educational purposes
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INFO
UML keywords
Activity
Association
Classifier
SysML keywords
Block
ValueType
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Associations can be used between activities and classifiers (blocks or value types) that are the type of object nodes, variables, or parameters in the activity, as shown in Figure 11-5.
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This supports linking the execution of the activity with items that are flowing through the activity or assigned to variables or parameters, and happen to be contained by an object node or assigned to a variable or parameter at the time the link exists.
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Activities as blocks can have associations between each other, including composition associations. Composition means that destroying an instance at the whole end destroys instances at the part end.
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This supports linking the execution of the activity with items that are flowing through the activity or assigned to variables or parameters, and happen to be contained by an object node or assigned to a variable or parameter at the time the link exists.
Properties with AdjunctProperty applied, where the principal of the AdjunctProperty is an object node, variable, or parameter, can be used as the end of the associations toward the object node, variable, or parameter type.
Like any association end or property these can be the subject of parametric constraints, design values, units, and quantity kinds.
The associations may be composition if the intention is to delete instances of the classifier flowing the activity when the activity is terminated. See example in 11.4, Usage Examples.
The supported variety of notations for associations and association annotations has been reduced to simplify the burden of teaching, learning, and interpreting SysML diagrams for the systems engineering user.
Notational and metamodel support for n-ary associations and qualified associations has been excluded from SysML.
The use of navigation arrowheads on an association has been simplified by excluding the case of arrowheads on both ends, and requiring that such an association always be shown without arrowheads on either end.
An “X” on a single end of an association to indicate that an end is not navigable has similarly been dropped, as has the use of a small filled dot at the end of an association to indicate that the end is owned by the associated classifier.
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