# Identity
## **Overview**
**Related Modules:**
[Samgr](samgr.md)
**Description:**
Identifies a service and feature.
You can use this structure to identity a [IUnknown](iunknown.md) feature to which messages will be sent through the asynchronous function of [IUnknown](iunknown.md).
## **Summary**
## Data Fields
## **Details**
## **Field Documentation**
## featureId
```
int16 Identity::featureId
```
**Description:**
[Feature](feature.md) ID
## queueId
```
MQueueId Identity::queueId
```
**Description:**
Message queue ID
## serviceId
```
int16 Identity::serviceId
```
**Description:**
[Service](service.md) ID