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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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ExampleBlock in a Block Definition Diagram (BDD)
REFERENCE CARD: Types of Block Properties and Block compartments
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SysMLv1 Part Property representations
REFERENCE CARD: Property cheat-sheet for Block
SysMLv1: A 'part property' in SysMLv1 does not formally include 'port' (which is considered a special kind of property), even though the Port metaclass in UML2 extends Property and a 'port' may have 'composite' aggregation and be typed by a Block.
Source
OMG Systems Modeling Language (SysML) 1.6
Copyright information
About Object Management Group copyright in text extracts quoted from OMG specifications for educational purposes
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INFO
UML keywords
Property
AggregationKind
Property::aggregation
AggregationKind::composite
SysML keywords
Block
part property
MD:PartProperty
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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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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Related snippets
SysML establishes four basic classifications of properties belonging to a SysML Block or ValueType.
A block can include properties to specify its values, parts, and references to other blocks.
Ports are a special class of property used to specify allowable types of interactions between blocks ...
Constraint Properties are a special class of property used to constrain other properties of blocks...
Related snippets (backlinks)
Four general categories of properties of blocks are recognized in SysML: parts, references, value properties, and constraint properties.
A part or value property is always shown on an internal block diagram with a solid-outline box.
Ports are special cases of properties, and have a variety of notations ...
Constraint properties and their parameters also have their own notations ...
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