Extensions.Quantities.RelationalOperations
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Contents
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
BooleanValue = QuantityTerm == NumericTerm;
BooleanValue = QuantityTerm != NumericTerm;
BooleanValue = QuantityTerm > NumericTerm;
BooleanValue = QuantityTerm >= NumericTerm;
BooleanValue = QuantityTerm < NumericTerm;
BooleanValue = QuantityTerm <= NumericTerm;
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 |
| QuantityTerm | Quantity | Term | - | [1] | Quantity value are compared |
| NumericTerm | Numeric | Term | - | [1] | Numeric value are compared |
OTL Examples
/// Local Declarations
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
