# ImplicitStreamSubscriptionAttribute.StreamIdMapper

[Type overview](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.implicitstreamsubscriptionattribute/) | [Properties](/orleans/docs/api/csharp/microsoft.orleans.streaming/orleans.implicitstreamsubscriptionattribute/properties/)

[Source](https://github.com/dotnet/orleans/blob/e4e752cedecc2976811db49802c7a999b1f1c704/src/Orleans.Streaming/Predicates/StreamSubscriptionAttributes.cs)

```csharp
public string StreamIdMapper
```

Gets the name of the stream identifier mapper.

### Value

The name of the stream identifier mapper.