Introduction

REST represents Representational State Transfer. REST is an architectural style in which every resource is addressed by using a unique URI. In Microsoft Dynamics CRM, a resource can be an entity collection or a record.

Microsoft Dynamics CRM implementation of OData

Microsoft Dynamics CRM 2011 uses the Windows Communication Foundation (WCF) Data Services framework to provide an Open Data Protocol (OData) endpoint that is a REST-based data service. This endpoint is called the Organization Data Service. In Microsoft Dynamics CRM, the service root URI is:

[Your Organization Root URL]/xrmservices/2011/organizationdata.svc/$metadata

 Limitations

The OData endpoint provides an alternative to the SOAP endpoint, but there are currently some limitations.

Only Create, Retrieve, Update, and Delete actions can be performed on entity records.

• Messages that require the Execute method cannot be performed.
• Associate and disassociate actions can be performed by using navigation properties.

Courtesy : MSDN Microsoft