---
source_files:
  - Common/DTS.CommonCore/Enums/Channels/ChannelCodeType.cs
generated_at: "2026-04-17T16:38:59.797080+00:00"
model: "zai-org/GLM-5-FP8"
schema_version: 1
sha256: "d62e91265181d499"
---

# Documentation: ChannelCodeType.cs

## 1. Purpose

This module defines the enumeration and constants for channel code types within the DTS system. It establishes a standardized distinction between ISO 13499-compliant channel codes and user-defined channel codes, providing both type identification (via the `ChannelCodeType` enum) and validation constraints (via length constants) for each code type.

---

## 2. Public Interface

### Class: `ChannelEnumsAndConstants`

**Namespace:** `DTS.Common.Enums.Channels`

#### Constants

| Name | Type | Value | Description |
|------|------|-------|-------------|
| `IsoCodeTypeString` | `string` | `"ISO 13499"` | String identifier for ISO-type channel codes |
| `UserCodeTypeString` | `string` | `"User"` | String identifier for user-defined channel codes |
| `ISO_CODE_LENGTH` | `int` | `16` | Fixed length for ISO channel codes |
| `USER_CODE_LENGTH` | `int` | `50` | Maximum length for user-defined channel codes |

#### Enum: `ChannelCodeType`

| Value | Description |
|-------|-------------|
| `ISO` | Represents ISO 13499-compliant channel codes |
| `User` | Represents user-defined channel codes |

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## 3. Invariants

- ISO channel codes must have a fixed length of exactly **16 characters** (`ISO_CODE_LENGTH`).
- User-defined channel codes must not exceed **50 characters** (`USER_CODE_LENGTH`).
- A channel code type must be either `ISO` or `User`—no other values are defined in the enumeration.
- The string representation of ISO type is always `"ISO 13499"`; the string representation of User type is always `"User"`.

---

## 4. Dependencies

**This module depends on:**
- None (no imports or external references in source)

**What depends on this module:**
- Cannot be determined from source alone. The namespace `DTS.Common.Enums.Channels` suggests this is part of a core utilities library likely consumed by channel-related components throughout the system.

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## 5. Gotchas

1. **Inconsistent naming convention:** Constants use mixed naming styles—`IsoCodeTypeString` uses PascalCase with "Iso" capitalized, while `ISO_CODE_LENGTH` uses SCREAMING_SNAKE_CASE. This may