Icon class icon_class fas fa-quote-left icon_class_computed fas fa-quote-left Related content Figure D.18 - Defining Structure of Power Subsystem (PowerSubsystem Breakdown) Block, Generalization, Association: Home entertainment system UML2/SysML1.x: If AggregationKind 'shared' has meaning to you (and if you use it consistently without contradicting the use of 'composite' aggregation elsewhere in your model) by all means use it. Damn the purists! But it's going to die in SysMLv2 anyway. 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» Source OMG Systems Modeling Language (SysML) 1.7beta1 Copyright information About Object Management Group copyright in text extracts quoted from OMG specifications for educational purposes Snippet kind EXAMPLE INFO UML keywords Association AggregationKind multiplicity AggregationKind::composite AggregationKind::shared MultiplicityElement::upperValue MultiplicityElement::lowerValue MultiplicityElement MultiplicityElement::/lower MultiplicityElement::/upper Property::isNavigable() DirectedRelationship::/target Previous snippet SysML defines defaults for multiplicities on the ends of specific types of associations. Full quote A part or shared association has a default multiplicity of [0..1] on the black or white diamond end. A unidirectional association has a default multiplicity of 1 on its target end. Next snippet Related snippets Related snippets (backlinks) These multiplicities may be assumed if not shown on a diagram. To avoid confusion, any multiplicity other than the default should always be shown on a diagram. A property typed by a Block that does not have composite aggregation is classified as a reference property. Visit also Visit also (backlinks) Flags
