CtxSegment

CtxSegment models the X12 CTX context/adjustment segment, used to carry an additional repeating series of adjustment reason-code/amount triplets analogous to CasSegment, but with monetary amounts scaled to cents on the wire: Build() truncates amount * 100 before writing, and Fill() divides the parsed value by 100 (BR-050).

Purpose

• Represents the CTX segment identity via SegmentId returning the literal "CTX" (BR-020).
• Carries GroupCode classifying the category of adjustment, plus repeating reason-code/amount triplets in the parallel Reasoncode/Amount lists starting at element 2, mirroring CasSegment's triplet layout (BR-061).
• Scales each triplet's amount to cents by truncating amount * 100 on Build(), and rescales back to a decimal amount by dividing by 100 on Fill() — the inverse of CasSegment's unscaled amounts (BR-050).
• Omits a reason-code triplet from Build() output entirely when its reason code is empty (BR-059).
• The quantity position of each triplet is not implemented — quantities are neither read nor written (BR-061).

Context

• Namespace: SAIF.Common.Files.Edi.Segments
• Assembly/package: SAIF.Framework.Common.Files

Public members

Member	Signature	Purpose
SegmentId	string SegmentId { get; }	Returns the literal X12 segment identifier "CTX".
GroupCode	string GroupCode { get; set; }	The adjustment group/category code (CTX01), element 1.
Reasoncode	List<string> Reasoncode { get; set; }	The parallel list of adjustment reason codes, one per triplet, at elements 2, 5, 8, 11, 14, 17 (up to six triplets) (BR-061).
Amount	List<decimal> Amount { get; set; }	The parallel list of adjustment amounts corresponding to each Reasoncode entry, scaled to/from cents on Build()/Fill() (BR-050).
Build	IEdiSegment Build()	Creates a SegmentBuilder("CTX"), adds GroupCode at element 1, then for each populated Reasoncode entry adds the reason code and Decimal.Truncate(Amount[i] * 100) at the triplet's two positions, skipping triplets whose reason code is empty (BR-059).
Fill	void Fill(IEdiSegment segment)	Computes the triplet count as floor((elementCount + 1) / 3) and, for each triplet index, assigns Reasoncode[i] and Amount[i] as the parsed value divided by 100 (BR-050, BR-061).
Parse	static CtxSegment Parse(IEdiSegment segment)	Instantiates a new CtxSegment, calls Fill(segment) on it, and returns it.

Behavioral notes

• As with CasSegment, Fill() assigns into Reasoncode[i] and Amount[i] by list index without first allocating those lists to the required size, which appears to make Fill() unreachable for any segment carrying adjustments as currently written**.
• Build() similarly requires the caller to have already populated Reasoncode and Amount with matching-length entries before calling it**.

Constraints and usage notes

• Callers must manually pre-populate Reasoncode and Amount with the correct number of entries before invoking either Build() or Fill(), an usage requirement not enforced or documented by the class itself**.

Note: Statements marked with ** could not be confirmed; treat as unknown until verified.

Sources

• Common\SAIF.Common.Files\Edi\Segments\CtxSegment.cs