IsSourcePartner

Function IsSourcePartner(const aSourceNum : integer) : boolean;

Example

procedure ScriptEvent(var Value: variant);
begin
  Value := IsSourcePartner(2); // True: EDI
end;

Usage

IsSourcePartner returns true for every source number except Velox's internal App value 1.

Parameters and result

Item	Type	Description
aSourceNum	integer, const	Source number to classify.
Result	boolean	False only for 1; True for all other integers.

Behaviour and security boundary

• True means “not explicitly internal,” not “recognized partner source.” This distinction is material for validation, routing and audit logic.
• Invalid values intentionally fall into the more restrictive external/partner side. This deliberately applies the more restrictive external treatment to every value other than the known internal value.
• If the caller must reject invalid sources, first use GetSourceCode and test for Null, then classify the validated number.
• A source number alone does not authenticate a partner, channel or caller. Apply the execution context's authorization and integrity controls.
• Future source values return True unless Velox explicitly classifies them as internal.

Additional Technical Info

IsSourcePartner is the exact negation of IsSourceInternal. It returns False only for source 1 (App) and returns True for every other integer.

This deliberately conservative classifier treats unknown or invalid sources as partner/external. It is not a validator for the recognized partner-source set.

Source classification

Value	Canonical source	Result
1	App	False
2	EDI	True
3	Web	True
4	API	True
0, negative or any other value	invalid/unknown	True

Implementation

The function returns not IsSourceInternal(aSourceNum). The internal helper tests only equality with 1; there is no range/membership check, database query or source-code conversion.

Side effects, errors and performance

The function is pure, constant-time and performs no I/O. Every integer has a defined Boolean result.

Related entries

• IsSourceInternal is the predicate being negated.
• GetSourceCode and GetSourceNum provide the recognized four-value mapping.

Created 2026-07-15