---
source_files:
  - Common/DTS.CommonCore/Classes/DTS.Viewer/TestMetadata/TestMetadata.cs
  - Common/DTS.CommonCore/Classes/DTS.Viewer/TestMetadata/TestGraphs.cs
  - Common/DTS.CommonCore/Classes/DTS.Viewer/TestMetadata/TestSetupMetadata.cs
  - Common/DTS.CommonCore/Classes/DTS.Viewer/TestMetadata/TestRunMetadata.cs
  - Common/DTS.CommonCore/Classes/DTS.Viewer/TestMetadata/TestSummary.cs
  - Common/DTS.CommonCore/Classes/DTS.Viewer/TestMetadata/TestModule.cs
  - Common/DTS.CommonCore/Classes/DTS.Viewer/TestMetadata/TestChannel.cs
  - Common/DTS.CommonCore/Classes/DTS.Viewer/TestMetadata/TestMetadataList.cs
generated_at: "2026-04-16T02:42:52.937741+00:00"
model: "Qwen/Qwen3-Coder-Next-FP8"
schema_version: 1
sha256: "c38901448183a71b"
---

# Documentation: TestMetadata Module

## 1. Purpose

This module provides data structures and parsing logic for loading, representing, and managing test metadata from XML-based `.dts` files in the DTS Viewer system. It defines core domain models (`TestMetadata`, `TestRunMetadata`, `TestSetupMetadata`, `TestModule`, `TestChannel`, `TestGraphs`, `TestSummary`) that encapsulate test configuration, hardware setup, channel definitions, and summary information. The `TestMetadataList` class is responsible for deserializing XML metadata files into strongly-typed objects and constructing `TestSummary` instances for UI consumption, including timestamp resolution using PTP1588 timing data when available.

## 2. Public Interface

### `TestMetadataList`

#### `GetTestSummaryListAsync(IBaseViewModel parent, string path, string file, string pattern = "")`
- **Behavior**: Asynchronous wrapper (currently synchronous implementation) that returns an `ObservableCollection<ITestSummary>` by parsing `.dts` files in the specified directory. Uses `pattern` to filter files (default: `.dts`). Requires `parent` for view model hierarchy.

#### `GetTestSummaryList(IBaseViewModel parent, string path, string file = "", string pattern = "")`
- **Behavior**: Synchronously returns an `ObservableCollection<ITestSummary>` by parsing `.dts` files. Uses `parent` to set `TestSummary.Parent`.

#### `GetTestSummaryList(string path, string file = "", string pattern = "")`
- **Behavior**: Same as above but without a `parent` parameter (used when parent is not applicable or set later).

#### `GetTestMetadataList(XDocument xDoc, string path, string file)`
- **Behavior**: Parses an `XDocument` (loaded `.dts` XML) into a `List<ITestMetadata>`. Handles channel array initialization and publishes errors via `IEventAggregator` on failure. Returns empty list on exception.

### `TestMetadata`

- **Properties**:
  - `ITestRunMetadata TestRun { get; set; }`
  - `ITestSetupMetadata TestSetup { get; set; }`
- **Behavior**: Simple container for test run and setup metadata.

### `TestRunMetadata`

- **Properties**:
  - `string Name { get; set; }` — Logical test name (from XML `@Id` attribute).
  - `string Id { get; set; }` — File name without extension (derived from `@FilePath`).
  - `string Description { get; set; }`
  - `bool InlineSerializedData { get; set; }`
  - `string TestGuid { get; set; }`
  - `int FaultFlags { get; set; }`
  - `string Software { get; set; }`
  - `string SoftwareVersion { get; set; }`
  - `string DataType { get; set; }`
  - `DateTime FileDate { get; set; }`
  - `string FilePath { get; set; }`
  - `List<ITestModule> Modules { get; set; }`
  - `List<ITestChannel> Channels { get; set; }`
  - `List<ITestChannel> CalculatedChannels { get; set; }`
  - `bool IsSelected { get; set; }`
- **Events**:
  - `event PropertyChangedEventHandler PropertyChanged` — Implements `INotifyPropertyChanged`.

### `TestSetupMetadata`

- **Properties**:
  - `string SetupName { get; set; }`
  - `DateTime TimeStamp { get; set; }`
  - `List<ITestGraphs> TestGraphs { get; set; }`
  - `CalibrationBehaviors CalibrationBehavior { get; set; }`

### `TestGraphs`

- **Properties**:
  - `string Name { get; set; }`
  - `string HardwareChannelName { get; set; }`
  - `List<string> ChannelIds { get; set; }`
  - `List<ITestChannel> Channels { get; set; }`

### `TestModule`

- **Properties**:
  - `string SerialNumber { get; set; }`
  - `string BaseSerialNumber { get; set; }`
  - `int AaFilterRateHz { get; set; }`
  - `int Number { get; set; }`
  - `int NumberOfSamples { get; set; }`
  - `int UnsubsampledNumberOfSamples { get; set; }`
  - `double RequestedPostTriggerSeconds { get; set; }`
  - `double RequestedPreTriggerSeconds { get; set; }`
  - `double PostTriggerSeconds { get; set; }`
  - `double PreTriggerSeconds { get; set; }`
  - `string RecordingMode { get; set; }`
  - `int SampleRateHz { get; set; }`
  - `int StartRecordSampleNumber { get; set; }`
  - `int NumberOfChannels { get; set; }`
  - `bool InlineSerializedData { get; set; }`
  - `int StartRecordTimestampSec { get; set; }`
  - `int StartRecordTimestampNanoSec { get; set; }`
  - `int TriggerTimestampSec { get; set; }`
  - `int TriggerTimestampNanoSec { get; set; }`
  - `List<ulong> TriggerSampleNumbers { get; set; }` — *Always empty* (see *Gotchas*).
  - `bool PTPMasterSync { get; set; }`
  - `int TiltSensorAxisX/Y/ZDegreesPre/Post { get; set; }`
  - `int TemperatureLocation1/2/3/4Pre/Post { get; set; }`
  - `List<ITestChannel> Channels { get; set; }`
  - `List<ITestChannel> CalculatedChannels { get; set; }`
  - `bool IsSelected { get; set; }`
- **Events**:
  - `event PropertyChangedEventHandler PropertyChanged`

### `TestChannel`

- **Properties**:
  - `string Group { get; set; }`
  - `string SubGroup { get; set; }`
  - `bool IsGraphChannel { get; set; }`
  - `string GraphName { get; set; }`
  - `string TestId { get; set; }`
  - `string TestSetupName { get; set; }`
  - `string ModuleSerialNumber { get; set; }`
  - `string SerialNumber { get; set; }`
  - `string ChannelId { get; set; }`
  - `string ChannelDisplayName { get; set; }`
  - `string Description { get; set; }`
  - `string IsoCode { get; set; }`
  - `string IsoChannelName { get; set; }`
  - `string UserCode { get; set; }`
  - `string UserChannelName { get; set; }`
  - `string ChannelGroupName { get; set; }`
  - `string ChannelType { get; set; }`
  - `bool IsCalculatedChannel { get; set; }`
  - `int Number { get; set; }`
  - `string DigitalMultiplier { get; set; }`
  - `string DigitalMode { get; set; }`
  - `DateTime Start { get; set; }`
  - `string Bridge { get; set; }`
  - `double BridgeResistanceOhms { get; set; }`
  - `double ZeroPoint { get; set; }`
  - `string ChannelDescriptionString { get; set; }`
  - `string ChannelName2 { get; set; }`
  - `string HardwareChannelName { get; set; }`
  - `double DesiredRange { get; set; }`
  - `double ActualMaxRangeEu { get; set; }`
  - `double ActualMinRangeEu { get; set; }`
  - `double ActualMaxRangeAdc { get; set; }` — Always `short.MaxValue`
  - `double ActualMinRangeAdc { get; set; }` — Always `short.MinValue`
  - `double ActualMaxRangeMv { get; set; }`
  - `double ActualMinRangeMv { get; set; }`
  - `double Sensitivity { get; set; }`
  - `string SoftwareFilter { get; set; }`
  - `bool ProportionalToExcitation { get; set; }`
  - `bool IsInverted { get; set; }`
  - `string LinearizationFormula { get; set; }`
  - `bool IsSubsampled { get; set; }`
  - `int AbsoluteDisplayOrder { get; set; }`
  - `DateTime LastCalibrationDate { get; set; }`
  - `string SensorId { get; set; }`
  - `int OffsetToleranceLowMv { get; set; }`
  - `int OffsetToleranceHighMv { get; set; }`
  - `int DataFlag { get; set; }`
  - `string ExcitationVoltage { get; set; }`
  - `string Eu { get; set; }`
  - `bool CalSignalEnabled { get; set; }`
  - `bool ShuntEnabled { get; set; }`
  - `bool VoltageInsertionCheckEnabled { get; set; }`
  - `bool RemoveOffset { get; set; }`
  - `string ZeroMethod { get; set; }`
  - `double ZeroAverageWindowBegin { get; set; }`
  - `double ZeroAverageWindowEnd { get; set; }`
  - `int InitialEu { get; set; }`
  - `string InitialOffset { get; set; }`
  - `int UnsubsampledSampleRateHz { get; set; }`
  - `double MeasuredShuntDeflectionMv { get; set; }`
  - `double TargetShuntDeflectionMv { get; set; }`
  - `double MeasuredExcitationVoltage { get; set; }`
  - `double FactoryExcitationVoltage { get; set; }`
  - `double TimeOfFirstSample { get; set; }`
  - `double Multiplier { get; set; }`
  - `double UserOffsetEu { get; set; }`
  - `int UnitConversion { get; set; }`
  - `bool AtCapacity { get; set; }`
  - `int CapacityOutputIsBasedOn { get; set; }`
  - `string SourceChannelNumber { get; set; }`
  - `string SourceModuleNumber { get; set; }`
  - `string SourceModuleSerialNumber { get; set; }`
  - `string Calculation { get; set; }`
  - `int SampleRateHz { get; set; }`
  - `string SensitivityUnits { get; set; }`
  - `int SensorCapacity { get; set; }`
  - `string SensorPolarity { get; set; }`
  - `int ChannelNumber { get; set; }`
  - `string BinaryFileName { get; set; }`
  - `string BinaryFilePath { get; set; }`
  - `double Xmax { get; set; }`
  - `double Xmin { get; set; }`
  - `int SequentialNumbers { get; set; }`
  - `ITestSetupMetadata ParentTestSetup { get; set; }`
  - `ITestModule ParentModule { get; set; }`
  - `IBaseViewModel Parent { get; set; }`
  - `Color ChannelColor { get; set; }`
  - `string ErrorMessage { get; set; }`
  - `bool IsError { get; set; }`
  - `Color? ErrorColor { get; set; }` — Derived from `IsError`.
  - `bool IsLocked { get; set; }`
  - `bool CanLock { get; set; }`
  - `bool CanSelectChannel { get; set; }`
  - `bool IsExpanded { get; set; }`
  - `bool IsSelected { get; set; }`
  - `double MinADC/MaxADC/AveADC/StdDevADC/T0ADC { get; set; }`
  - `double MinMV/MaxMV/AveMV/StdDevMV/T0MV { get; set; }`
  - `double MinEU/MaxEU/AveEU/StdDevEU/T0EU { get; set; }`
  - `double MinY/MaxY/AveY/StdDevY/T0Value { get; set; }`
- **Methods**:
  - `void SetChannelDescriptionAndDisplayName(string channelDescription)` — Sets `ChannelDescriptionString` and `ChannelDisplayName`.
  - `ITestChannel Copy()` — Shallow copy via `MemberwiseClone()`.
  - `override string ToString()` — Returns `ChannelDescriptionString` or `"N/A"` if test-specific embedded.
- **Events**:
  - `event PropertyChangedEventHandler PropertyChanged` — Inherited from `BasePropertyChanged`.

### `TestSummary`

- **Properties**:
  - `string Id { get; set; }` — Concatenation of `TestRun.Id` and event number from `FilePath`.
  - `string SetupName { get; set; }`
  - `string Description { get; set; }`
  - `int ChannelCount { get; set; }`
  - `DateTime FileDate { get; set; }`
  - `DateTime TimeStamp { get; set; }` — Derived from module PTP timestamps if valid, else `TestSetup.TimeStamp`.
  - `string DataType { get; set; }`
  - `bool IsSelected { get; set; }`
  - `List<ITestGraphs> Graphs { get; set; }`
  - `List<ITestChannel> Channels { get; set; }`
  - `List<ITestChannel> CalculatedChannels { get; set; }`
  - `IBaseViewModel Parent { get; set; }`
  - `CalibrationBehaviors CalibrationBehavior { get; set; }` — Default: `NonLinearIfAvailable`.
  - `ITestMetadata TestMetadata { get; set; }`
- **Commands**:
  - `DelegateCommand IsSelectedCommand { get; }` — Toggles selection and updates `Parent.SelectedTestSummaryList`.
- **Methods**:
  - `void SelectionChanged()` — Adds/removes `this` from `Parent.SelectedTestSummaryList` and calls `PublishSelectedTestSummaryList()` on parent.
  - `void OnPropertyChanged(string propertyName)` — Raises `PropertyChanged`.
- **Events**:
  - `event PropertyChangedEventHandler PropertyChanged`
- **Constants**:
  - `public const string ROI_SUFFIX = @"_ROI Period";`

## 3. Invariants

- **`TestMetadata`**: Must contain non-null `TestRun` and `TestSetup` references after successful parsing.
- **`TestRunMetadata.Channels` and `TestRunMetadata.CalculatedChannels`**: Initialized as empty lists during parsing if missing in XML.
- **`TestModule.TriggerSampleNumbers`**: Always initialized as an empty list; never populated (see *Gotchas*).
- **`TestChannel.ChannelId`**: If missing or `-1` in XML, defaults to `m.GetHashCode().ToString()` (non-deterministic).
- **`TestChannel.HardwareChannelName`**: For calculated channels, always set to `"N/A"` (via `Strings.Strings.Table_NA`).
- **`TestChannel.SerialNumber`**: For calculated channels, always set to `"N/A"`.
- **`TestSummary.TimeStamp`**: Falls back to `TestSetup.TimeStamp` if PTP timestamps are invalid or unavailable.
- **`TestSummary.Id`**: Always includes event number extracted from `FilePath` via `ParseEventNumber`.
- **`TestChannel.IsCalculatedChannel`**: Must be `true` for channels loaded via `LoadTestCalculatedChannels`.
- **`TestSummary.IsSelected`**: Setter enforces selection logic via `SelectionChanged()` and `Parent` interaction.

## 4. Dependencies

### Internal Dependencies (from source):
- **Interfaces**:
  - `DTS.Common.Interface.ITestMetadata`, `ITestRunMetadata`, `ITestSetupMetadata`, `ITestGraphs`, `ITestModule`, `ITestChannel`, `ITestSummary`, `IBaseViewModel`, `IGraphMainViewModel`
- **Enums**:
  - `DTS.Common.Enums.Sensors.CalibrationBehaviors`
- **Utilities**:
  - `DTS.Common.XMLUtils.TestMetadataXml`
  - `DTS.Common.Base.BasePropertyChanged`
  - `DTS.Common.Constants.EventNumber`
  - `DTS.Common.Utils.TestUtils`, `PTP1588Timestamps`
  - `DTS.Common.XMLUtils.TestMetadataFields`, `TestSetupMetadataFields`, `TestGraphsFields`, `TestModuleFields`, `TestChannelFields`
  - `DTS.Common.Strings.Strings`
- **Prism Framework**:
  - `Microsoft.Practices.Prism.Commands.DelegateCommand`
  - `Microsoft.Practices.Prism.Events.IEventAggregator`, `Events.PageErrorEvent`
  - `Microsoft.Practices.ServiceLocation.ServiceLocator`

### External Dependencies:
- `System.Xml.Linq`
- `System.Collections.ObjectModel`
- `System.ComponentModel`
- `System.Windows.Media` (for `Color`)

### Inferred Consumers:
- UI view models (`ITestSummaryListViewModel`, `IGraphMainViewModel`) that interact with `TestSummary` and `TestChannel`.
- XML loading utilities (`TestMetadataXml`) for parsing `.dts` files.
- Event aggregation system for error reporting.

## 5. Gotchas

- **`TestModule.TriggerSampleNumbers` is always empty**: The `LoadTriggerSampleNumbers` method ignores its input and returns `new List<ulong>()`. This field is likely unused or deprecated.
- **Non-deterministic `ChannelId` for missing IDs**: If `ChannelId` attribute is missing or `-1`, `m.GetHashCode().ToString()` is used, which is not stable across runs or app restarts.
- **Calculated channel data loss**: For calculated channels, many fields (e.g., `IsoCode`, `IsoChannelName`, `UserCode`, `UserChannelName`, `HardwareChannelName`, `SerialNumber`) are hardcoded to `"N/A"`. Some fields like `FactoryExcitationVoltage` and `TimeOfFirstSample` are incorrectly assigned values from unrelated attributes (e.g., `UnsubsampledSampleRateHz` → `FactoryExcitationVoltage`).
- **`TestRunMetadata.Id` vs `Name` confusion**: `Id` is derived from file name (`Path.GetFileNameWithoutExtension(FilePath)`), while `Name` comes from XML `@Id` attribute. This may be counterintuitive.
- **`TestSummary.TimeStamp` fallback behavior**: Uses `TestSetup.TimeStamp`