fUML1.4: Cameo Simulation Toolkit: LIMITATION: CreateObjectAction is not allowed to instantiate a UML DataType or a SysMLValueType, only a Class as the CreateObjectAction::classifier! WORKAROUND: Use a ValueSpecificationAction instead with an instance.
SysML numeric value types can be linked to units, where units are modeled with the SysML Unit block. These units are linked to value types that are generalized by SysML’s numeric value types. Units and their symbols are from ISO 80000. Source SysPhS-1.1
SysML: Although not encouraged, you can still use a DataType to type a Property of a Block, it just won't be listed in the 'values' compartment. Prefer the SysML ValueType versions of primitives!
Class compartments Gallery Tutorial TRAIL: Webel's ultimate guide to Systems Modeling Language (v1) with MagicDraw/Cameo Section 01:02: UML 101 for model-based systems engineering with SysML Slide kind UML Class Diagram
SysML Complex ValueType Gallery Tutorial TRAIL: Webel's ultimate guide to Systems Modeling Language (v1) with MagicDraw/Cameo Section 08:02: The SysML ValueType, Unit, and using values Slide kind SysML Block Definition Diagram (BDD)
A DataType may be parameterized, bound, and used as TemplateParameters. Source Unified Modeling Language 2.5.1
Instances of a structured DataType are considered to be equal if and only if the structure is the same and the values of the corresponding attributes are equal. Source Unified Modeling Language 2.5.1
If a DataType has attributes (i.e., Properties owned by it and in its namespace) it is called a structured DataType. Instances of a structured DataType contain attribute values matching its attributes. Source Unified Modeling Language 2.5.1
Structured vs Primitive DataType Gallery Tutorial TRAIL: Webel's ultimate guide to Systems Modeling Language (v1) with MagicDraw/Cameo Section 08:02: The SysML ValueType, Unit, and using values Slide kind hybrid diagram UML Class Diagram UML Object diagram
A DataType is a kind of Classifier. DataType differs from Class in that instances of a DataType are identified only by their value. All instances of a DataType with the same value are considered to be equal instances. Source Unified Modeling Language 2.5.1
A PrimitiveType defines a predefined DataType, without any substructure. A PrimitiveType may have algebra and operations defined outside of UML, for example, mathematically. Source Unified Modeling Language 2.5.1
UML DataType vs SysML ValueType Gallery Tutorial TRAIL: Webel's ultimate guide to Systems Modeling Language (v1) with MagicDraw/Cameo Section 08:02: The SysML ValueType, Unit, and using values Slide kind UML Profile Diagram
In SysML, unless you MUST use a DataType or PrimitiveType from an existing ModelLibrary or Profile, you SHOULD probably be using a ValueType, Enumeration ValueType, or SysML PrimitiveValueType instead so that it integrates with the value system of SysML.
DO NOT use Property names that are identical to the names of the Classifier (Class, DataType, Block, ValueType) that type them!
Figure 8-4: Abstract syntax extensions for SysML value types Gallery Tutorial TRAIL: The SysML-1.6 Hybrid SUV sample and specification diagrams in MagicDraw/Cameo (with annotations) [UNDERGOING UPDATE to SysML1.7] Section Section: SysML-1.6 specification diagrams: 08 Blocks Slide kind UML Profile Diagram
A SysML ValueType may define its own properties and/or operations, just as for a UML DataType. Source OMG Systems Modeling Language (SysML) 1.6
A quantity kind is a kind of quantity that may be stated in terms of defined units, but does not restrict the selection of a unit to state the value. A unit is a particular value in terms of which a quantity of the same quantity kind may be expressed. Source OMG Systems Modeling Language (SysML) 1.6
SysML ValueType adds an ability to carry a unit of measure and quantity kind associated with the value. Source OMG Systems Modeling Language (SysML) 1.6
More specific value types can define the concrete data representations that a digital computer can process, such as conventional Float, Integer, or String types. Source OMG Systems Modeling Language (SysML) 1.6
For example, the SysML "Real" ValueType expresses the mathematical concept of a real number, but does not impose any restrictions on the precision or scale of a fixed or floating-point representation that expresses this concept. Source OMG Systems Modeling Language (SysML) 1.6
SysML defines ValueType as a stereotype of UML DataType to establish a more neutral term for system values that may never be given a concrete data representation. Source OMG Systems Modeling Language (SysML) 1.6
Value types may be used to type properties, operation parameters, or potentially other elements within SysML. Source OMG Systems Modeling Language (SysML) 1.6
Since a value cannot be identified except by means of the value itself, each such value within a model is independent of any other, unless other forms of constraints are imposed. Source OMG Systems Modeling Language (SysML) 1.6
A ValueType defines types of values that may be used to express information about a system, but cannot be identified as the target of any reference. Source OMG Systems Modeling Language (SysML) 1.6
UML has an Integer type, not an 'int' type, but the MagicDraw and Cameo tools include a DataType 'int' in an additional profile
DataTypes model Types whose instances are distinguished only by their value Source Unified Modeling Language 2.5.1
