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2.4.1, an element is an abstract class with no superclass. It is used as the superclass or base class, as known by object-oriented programmers, for all the metaclasses in the UML infrastructure library. All other elements in the UML inherit, directly or indirectly from
Element. An Element has a
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Subclasses of
Element provide semantics appropriate to the concept they represent. The comments for an Element add no semantics but may represent information useful to the reader of the model.
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derived composition association to itself to support the general capability for elements to own other elements. As such, it has no additional attributes as part of its specification.
61:: An Element may own an arbitrary quantity of elements. This is called a derived union, symbolized by the forward slash notation. The asterisk in brackets is the Element's
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The
Element class belongs to the base package in the UML called the Kernel. This is the package that contains the superclasses that make up the superstructure of the UML.
51:: An Element may own, or have associated to it, an arbitrary quantity of comments. A comment is sometimes referred to as a note. The asterisk in brackets is the Comment's
71:: The Element that owns this element. This is called a derived union, symbolized by the forward slash notation. The is the owning Element's
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is "a constituent of a model. As such, it has the capability of owning other
Elements."
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which means that there can be an arbitrary number of elements owned by an
Element.
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which means that there can be an arbitrary number of comments owned by an
Element.
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Standards
Development Organization (OMG SDO). December 2017. p. 43.
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Standards
Development Organization (OMG SDO). December 2017. p. 43.
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UML 2 Certification Guide, Tim
Weilkiens and Bernd Oestereich -
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which means that there can only be zero to one owner element.
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Standards
Development Organization (OMG SDO). December 2017.
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OMG Unified Modeling Language, Superstructure, Version 2.4.1
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94:version 2.4.1. Further updated for
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40:An association describes a set of
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59:/ ownedElement: Element
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44:of typed instances.
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98:version 2.5.1.
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