# <a id="Aeon_Acquisition_MetadataSource_1"></a> Class MetadataSource<TMetadata\>

Namespace: [Aeon.Acquisition](Aeon.Acquisition.md)  
Assembly: Aeon.Acquisition.dll  

```csharp
[Combinator]
[WorkflowElementCategory(ElementCategory.Source)]
public abstract class MetadataSource<TMetadata>
```

#### Type Parameters

`TMetadata` 

#### Inheritance

[object](https://learn.microsoft.com/dotnet/api/system.object) ← 
[MetadataSource<TMetadata\>](Aeon.Acquisition.MetadataSource\-1.md)

#### Inherited Members

[object.ToString\(\)](https://learn.microsoft.com/dotnet/api/system.object.tostring), 
[object.Equals\(object\)](https://learn.microsoft.com/dotnet/api/system.object.equals\#system\-object\-equals\(system\-object\)), 
[object.Equals\(object, object\)](https://learn.microsoft.com/dotnet/api/system.object.equals\#system\-object\-equals\(system\-object\-system\-object\)), 
[object.ReferenceEquals\(object, object\)](https://learn.microsoft.com/dotnet/api/system.object.referenceequals), 
[object.GetHashCode\(\)](https://learn.microsoft.com/dotnet/api/system.object.gethashcode), 
[object.GetType\(\)](https://learn.microsoft.com/dotnet/api/system.object.gettype), 
[object.MemberwiseClone\(\)](https://learn.microsoft.com/dotnet/api/system.object.memberwiseclone)

## Methods

### <a id="Aeon_Acquisition_MetadataSource_1_OnNext__0_"></a> OnNext\(TMetadata\)

```csharp
public void OnNext(TMetadata value)
```

#### Parameters

`value` TMetadata

### <a id="Aeon_Acquisition_MetadataSource_1_Process"></a> Process\(\)

```csharp
public virtual IObservable<TMetadata> Process()
```

#### Returns

 [IObservable](https://learn.microsoft.com/dotnet/api/system.iobservable\-1)<TMetadata\>

### <a id="Aeon_Acquisition_MetadataSource_1_Process_System_IObservable_Bonsai_Harp_HarpMessage__"></a> Process\(IObservable<HarpMessage\>\)

```csharp
public virtual IObservable<Timestamped<TMetadata>> Process(IObservable<HarpMessage> source)
```

#### Parameters

`source` [IObservable](https://learn.microsoft.com/dotnet/api/system.iobservable\-1)<HarpMessage\>

#### Returns

 [IObservable](https://learn.microsoft.com/dotnet/api/system.iobservable\-1)<Timestamped<TMetadata\>\>