> For the complete documentation index, see [llms.txt](https://help.santesuite.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.santesuite.org/developers/server-plugins/implementing-.net-features/service-definitions/dcdr-subscription-definition-provider.md).

# dCDR Subscription Definition Provider

`ISubscriptionRepository` in assembly SanteDB.Core.Api version 3.0.1980.0

## Summary

Represents a repository which maintains subscription definitions

### Description

This service is used to maintain instances of [SubscriptionDefinition](http://santesuite.org/assets/doc/net/html/T_SanteDB_Core_Model_Subscription_SubscriptionDefinition.htm) which contain SQL (or other query grammar) to allow dCDR instances to easily query data on the HDSI interface using the `_subscription` parameter. The HDSI maps the subscription ID with the local data provider and then executes the appopriate query against the persistence layer to ensure fast synchronization of new data.

## Implementations

### AppletSubscriptionRepository - (SanteDB.Core.Applets)

An implementation of the [ISubscriptionRepository](http://santesuite.org/assets/doc/net/html/T_SanteDB_Core_Services_ISubscriptionRepository.htm) that loads definitions from applets

#### Service Registration

```markup
...
<section xsi:type="ApplicationServiceContextConfigurationSection" threadPoolSize="4">
	<serviceProviders>
		...
		<add type="SanteDB.Core.Applets.Services.Impl.AppletSubscriptionRepository, SanteDB.Core.Applets, Version=3.0.1980.0, Culture=neutral, PublicKeyToken=null" />
		...
	</serviceProviders>
```

## Example Implementation

```csharp
/// Example Implementation
using SanteDB.Core.Services;
/// Other usings here
public class MySubscriptionRepository : SanteDB.Core.Services.ISubscriptionRepository { 
	public String ServiceName => "My own ISubscriptionRepository service";
}
```

## References

* [ISubscriptionRepository C# Documentation](http://santesuite.org/assets/doc/net/html/T_SanteDB_Core_Services_ISubscriptionRepository.htm)
* [AppletSubscriptionRepository C# Documentation](http://santesuite.org/assets/doc/net/html/T_SanteDB_Core_Applets_Services_Impl_AppletSubscriptionRepository.htm)