Property::aggregation

A Port of an EncapsulatedClassifier is shown as a small square symbol. The Port symbol may be placed either overlapping the boundary of the rectangle symbol denoting that EncapsulatedClassifier or it may be shown inside the rectangle symbol.

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Unified Modeling Language 2.5.1

A Port is a Property of an EncapsulatedClassifier that specifies a distinct interaction point between that EncapsulatedClassifier and its environment or between the Behavior of the EncapsulatedClassifier and its internal roles. Ports are connected by ...

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Unified Modeling Language 2.5.1

A part may be shown by graphical nesting of a box symbol

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Unified Modeling Language 2.5.1

Composite aggregation is a strong form of aggregation that requires a part object be included in at most one composite object at a time. If a composite object is deleted, all of its part instances that are objects are deleted with it.

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Unified Modeling Language 2.5.1

The dot shows that the model includes a Property of the type represented by the Classifier touched by the dot. This Property is owned by the Classifier at the other end.

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Unified Modeling Language 2.5.1

The dot is to be drawn integral to the graphic path of the line, at the point where it meets the Classifier, inserted between the end of the line and the side of the node representing the Classifier.

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Unified Modeling Language 2.5.1

Ownership of Association ends by an associated Classifier may be indicated graphically by a small filled circle, which for brevity we will term a dot.

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Unified Modeling Language 2.5.1

Aggregation type, navigability, and end ownership are separate concepts, each with their own explicit notation. Association ends owned by classes are always navigable, while those owned by associations may be navigable or not.

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Unified Modeling Language 2.5.1

SysMLv1: TIP: You can strengthen the ill-defined semantics of Property 'aggregation' (an AggregationKind) by applying custom Stereotypes to a Property, documented with its intended use. Not perfect, but better than not. EXAMPLE: «assembled»

SysML: Syntax ain't Semantics: FUN CHALLENGE: SysMLv1 block property aggregation: 'The tornado chaser plane "has" a chaser car "with" a chaser team.'

A property typed by a SysML ValueType is classified as a value property, and always has composite aggregation.

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OMG Systems Modeling Language (SysML) 1.6

A property typed by a SysML Block that has composite aggregation is classified as a part property, except for the special case of a constraint property ...

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OMG Systems Modeling Language (SysML) 1.6

A property typed by a Block that does not have composite aggregation is classified as a reference property.

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OMG Systems Modeling Language (SysML) 1.7beta1

Constraint properties are further defined in Clause 10. A port is another category of property, as further defined in Section 9.

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OMG Systems Modeling Language (SysML) 1.6

A common interpretation of composite Aggregation of a part property in SysML domain modelling is that if the owner Block is "destroyed" so is the child part property. Webel adopts these semantics always.

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