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A primitive type defines a predefined data type, without any relevant substructure (i.e., it has no parts). A primitive datatype
may have an algebra and operations defined outside of UML, for example, mathematically.
Description
Constructs::PrimitiveType reuses the definition of PrimitiveType from Basic. It adds a specialization to Constructs::DataType.
The instances of primitive type used in UML itself include Boolean, Integer, UnlimitedNatural, and String (see Chapter 12,
“Core::PrimitiveTypes?).
Generalizations
•
“DataType? on page 134
Attributes
No addtional attributes
Associations
No additional associations
Constraints
No additional constraints
Semantics
The run-time instances of a primitive type are data values. The values are in many-to-one correspondence to mathematical elements
defined outside of UML (for example, the various integers).
Instances of primitive types do not have identity. If two instances have the same representation, then they are indistinguishable.
Notation
A primitive type has the keyword «primitive» above or before the name of the primitive type.
Instances of the predefined primitive types (see Chapter 12, “Core::PrimitiveTypes?) may be denoted with the same notation
as provided for references to such instances (see the subtypes of “ValueSpecification?).
Examples
See Chapter 12, “Core::PrimitiveTypes? for examples.