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Type_Quantity_String

Type_Quantity_String = 'Unit'

Example​

procedure ScriptEvent(var Value: variant);
begin
  Value := GetUomTypeNum(Type_Quantity_String); // 1
end;

Usage​

Type_Quantity_String provides the duplicate Unit text paired with Type_Quantity in Velox UOM classification.

Value

PropertyValue
Script typeString
Text valueUnit
Paired numberType_Quantity = 1
Database domainUom_Type.Num / Uom_Type.Description
Referencing fieldsUom.TypeNum, Product_Uom.UomTypeNum, Product_Price.UomTypeNum

Additional Technical Info​

Type_Quantity_String is the script-visible String partner for Type_Quantity. Its exact value is Unit, deliberately the same as Type_Unit_String.

It classifies a unit-of-measure record; it does not define an actual UOM code, pack size, price, quantity, conversion factor or inventory amount.

Implementation

Velox declares and registers exact text Unit. GetUomTypeNum maps it to 1; GetUomTypeCode performs the reverse mapping. String names are not tag entries.

Fresh-build VxData seeds Uom_Type row 1 with Description Unit. The database describes the domain as controlling whether UOMs can be used in quantity, tie and pallet contexts; a null Uom.TypeNum means the UOM is global.

The text-to-number converter checks Type_Quantity_String before Type_Unit_String. Because both text values are Unit, the later Unit branch is unreachable; both branches would return the same integer 1. The number-to-text converter handles value 1 through Type_Unit and returns Type_Unit_String.

Behaviour

Text-to-number conversion is case-insensitive but non-trimming. Unsupported or padded text returns Null; number-to-text conversion returns Null for Null or an unsupported number.

Type_Quantity and Type_Unit both equal 1; Type_Quantity_String and Type_Unit_String both equal Unit. After evaluation they are indistinguishable.

Edge cases and quirks

  • Type_Quantity and Type_Unit both equal 1; Type_Quantity_String and Type_Unit_String both equal Unit. After evaluation they are indistinguishable.
  • The duplicate value/text is intentional in native source, not a separate database row named Quantity.
  • The String identifier is not a tag-map entry.
  • Text conversion accepts case differences but not leading/trailing whitespace.
  • A null Uom.TypeNum has database meaning (global UOM); none of these constants represents null/global.
  • PascalScript retains no UOM-domain type after evaluation, so same-valued constants from other families are not interchangeable.

Side effects

Reading Type_Quantity_String, comparing it or using the fixed converters has no I/O or state-changing effect.

Errors

Reading the constant does not raise an error. Converter misses return Null. Persisting a number outside the seeded/configured UOM type table can fail a foreign key.

Performance and concurrency

This is immutable compiled metadata. Access and the short fixed converter cases are constant-time for practical purposes and carry no shared mutable UOM state.

Remarks

The example is source-reviewed and non-destructive. It does not load a UOM record or calculate quantities.

Related entries

Created 2026-07-15