Extensions.Quantities.Unit

Classification

Name	Unit
Short Description	A physical unit which is defined in a UNIT-SPEC.
Class	Simple Data Type
Base Data Type	SimpleType
Default Value	A dimensionless unit.
Provide a Literal	Yes
SpecifiedBy	ISO 13209-3
Standard Compliant	Yes

Description

A Unit represents a physical unit which is defined in a UNIT-SPEC. A Unit can be associated to a physical value when creating a Quantity, but it can also be used stand-alone, e.g. when comparing the display Unit of a Quantity to another Unit object.

Literal

The syntax for Literals for complex data types will be used, UnitLiteral be used to create a Unit object based on a unit definition contained in UNIT-SPEC document.

Value = Literal

Core Conversion

The following table shows the rules for conversion to another data type:

Conversion	Result	Sample
ToBoolean	Undefined (should not be used)
ToInteger	Undefined (should not be used)
ToFloat	Undefined (should not be used)
ToString	Returns the DISPLAY-NAME of the corresponding unit definition.	String s = ToString([@Unit, "BL_DataLibraMIB.odx", "km"]); // Returns "km"
ToByteField	Undefined (should not be used)

Sample

Quantities.Unit UnitVariable = [@Unit, "BL_DataLibraMIB.odx", "km"];