Icon class icon_class fas fa-quote-left icon_class_computed fas fa-quote-left Related content Figure 28: Units in SysML Source SysPhS-1.1 Copyright information About Object Management Group copyright in text extracts quoted from OMG specifications for educational purposes Snippet kind INFO UML keywords DataType SysML keywords ValueType Keywords SysPhS SysML Systems Modeling Language Previous snippet Full quote Data types in SysML are called value types. Next snippet 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. The above statement in SysPhS-1.1 is not quite accurate. Indeed: 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! The main point is: 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.' SysML-1.6: 'SysML ValueType adds an ability to carry a unit of measure and quantity kind associated with the value.' Related snippets DataTypes model Types whose instances are distinguished only by their value 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. SysML ValueType adds an ability to carry a unit of measure and quantity kind associated with the value. Related snippets (backlinks) 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. Figure 28 shows how a value type with units is defined in SysML, from the units library in Figure 20 [ERROR], Subclause 11.2.2 [ERROR]. It has a value type Force that specializes the Real value type and has newton as unit. The newton unit has a symbol N. Visit also Visit also (backlinks) Flags