Value Type

A Value Type is defined as a stereotype of UML Data Type to establish a more neutral term for system values that may never be given a concrete data representation. A Value Type adds an ability to carry a units of measure of a Quantity Kind associated with the value.

Use the QUDV model library to find all standard value types.

When specifying the Value Type for a Value Property, you can select one of the following:

Unitless Value Type.
Value Type with specified unit.

Look at the table below to see the differences.

If you cannot find the Value Type you need, you can create a custom Value Type. Learn how to create a custom Value Type >>
If you cannot find the unit you need, you can create a custom Unit. Learn how to create a custom units >>

If you want to specify the Value Type for a Value Property, follow the procedures in the Using Units page.

Value Type	Name construction	Purpose	Example
Unitless	Quantity name, e.g. distance.	Use this to create a general-purpose model. Instance Specifications and its Slots can contain different units of the same Block.
With specified units	Quantity and unit names, e.g. distance[metre].	Use this to create a specific-purpose model. Instance Specifications and its Slots can contain the same units of the same Block.

Related diagrams

SysML Block Definition Diagram