---
source_files:
  - Common/DTS.Common/Interface/DTS.Viewer/TestModification/ITestModificationView.cs
  - Common/DTS.Common/Interface/DTS.Viewer/TestModification/ITestModificationViewModel.cs
  - Common/DTS.Common/Interface/DTS.Viewer/TestModification/ITestModificationModel.cs
generated_at: "2026-04-17T16:35:54.913135+00:00"
model: "zai-org/GLM-5-FP8"
schema_version: 1
sha256: "e3203bdeab45d508"
---

# Documentation: Test Modification Module

## 1. Purpose

This module defines the contract for a Test Modification feature within the DTS Viewer application. It provides interfaces for modifying test channel properties—including description, EU multiplier/offset, timing parameters (T0, T1, T2), sensitivity, software filters, and data flags—while tracking which fields have been modified. The module follows a Model-View-ViewModel (MVVM) pattern and supports persisting calibration updates to a database.

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## 2. Public Interface

### `ITestModificationView`
**Namespace:** `DTS.Common.Interface`

A marker interface extending `IBaseView` with no additional members. Represents the view component in the MVVM architecture for test modification.

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### `ITestModificationViewModel`
**Namespace:** `DTS.Common.Interface`

Extends `IBaseViewModel`. Coordinates between the view and model for test modification operations.

| Member | Type | Description |
|--------|------|-------------|
| `View` | `ITestModificationView` | Gets or sets the associated view instance. |
| `Parent` | `IBaseViewModel` | Gets or sets the parent view model in the hierarchy. |
| `UseISOCodeFilterMapping` | `bool` | Controls whether ISO code should be modified when software filter is modified. |
| `UseZeroForUnfiltered` | `bool` | Controls whether '0' or 'P' is used when ISO code is modified due to software filter change. |
| `PublishChanges()` | `void` | Publishes pending modifications. |
| `UpdateDatabaseMethod()` | `void` | Updates the sensor calibration in the database. |

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### `ITestModificationModel`
**Namespace:** `DTS.Common.Interface`

Extends `IBaseModel`. Holds the state and data for test modification operations.

**Hierarchy & Context:**

| Member | Type | Description |
|--------|------|-------------|
| `Parent` | `ITestModificationViewModel` | Gets or sets the parent view model. |
| `SelectedChannel` | `ITestChannel` | Gets or sets the channel on which modifications are based. |
| `Sensor` | `ISensorDbRecord` | Gets or sets the sensor database