Extensions.Quantities.RelationalOperations

Classification

Name	Relational Operations
Short Description	Compares the numerical quantities
Class	Operations
Extension	OTX Quantities extension
Group	Overloading semantics
Exceptions	InvalidConversionException
Checker Rules	-
Standard Compliant	Yes

OTL Syntax

/// Local Declarations
Boolean BooleanVariable = false;
/// Flow
BooleanVariable = QuantityTerm1 ==| !=| >| >=| <| <= QuantityTerm2;

Description

• When Quantity values are compared using relational operators, an OTX runtime shall use the quantities' normalized values for comparison. So if e.g. a Quantity of 8 kilometers is to be compared with a Quantity of 10 miles, the runtime system shall convert both values into meters before doing the comparison.

• Furthermore, the physical dimensions of the display unit of the Quantity values being compared shall be identical – e.g. it is allowed to compare distances with each other, but it is illegal to compare a distance to a time – in that case an InvalidConversionException shall be thrown.

• If scalar operands exist, they shall be interpreted as normalized values according to the physical dimension of the Quantity operands. This allows e.g. the comparison of 2 km < 11 which will result in false (because the comparison is equivalent to comparing 2 km < 11m).

Return Value

The Term returns the value, see table below.

In OTX, Terms are categorized according to its return data type!

Data Type	Description
Boolean	The result of the comparision of the numerical quantities

Properties

Name	Data Type	Class	Default	Cardinality	Description
QuantityTerm1	Quantity	Term	-	[1]	NumericQuantity operand to be compared
QuantityTerm2	Quantity	Term	-	[1]	NumericQuantity operand to be compared

OTL Examples

Boolean Boolean1 = false;

/// Flow

Boolean1 = 8 [@Unit, "BL_DataLibraMIB.odx", "km"] != 10 [@Unit, "BL_DataLibraMIB.odx", "mile"];

See also

Addition
Subtraction
Multiplication
Division
Modulo
Absolute Value
Negation