# OtlpExporterAnnotation

- Kind: `class`
- Package: [Aspire.Hosting](/reference/api/csharp/aspire.hosting.md)
- Version: `13.3.0`
- Namespace: `Aspire.Hosting.ApplicationModel`
- Target framework: `net8.0`
- Source: [GitHub](https://github.com/microsoft/aspire/blob/bd20f904cde09ecb9c9ae5116a6f13614bf2d7c2/src/Aspire.Hosting/ApplicationModel/OtlpExporterAnnotation.cs)
- Implements: [IResourceAnnotation](/reference/api/csharp/aspire.hosting/iresourceannotation.md)

An annotation which indicates that a resource has OTLP exporter configured.

## Definition

```csharp
namespace Aspire.Hosting.ApplicationModel;

public class OtlpExporterAnnotation
    : Aspire.Hosting.ApplicationModel.IResourceAnnotation
{
    // ...
}
```

## Constructors

- [OtlpExporterAnnotation](/reference/api/csharp/aspire.hosting/otlpexporterannotation/constructors.md#constructor)

## Properties

- [RequiredProtocol](/reference/api/csharp/aspire.hosting/otlpexporterannotation/properties.md#requiredprotocol) : [OtlpProtocol?](/reference/api/csharp/aspire.hosting/otlpprotocol.md) `get; init` -- Gets or sets the default protocol for the OTLP exporter.