welcome to XRM blog

Keep in touch with latest CRM/ERP articles

To remain competitive your organisation must be efficient across the business process spectrum. To do so you need to take sound decisions based on a balance between the cost and risk. To do so you will be heavily dependent on your content management in itself needs...

image
Blog

What is OData?

By Anurag on 10/20/2016

The OData endpoint with web resources provides an alternative interface to work with Microsoft Dynamics CRM 2016 and Microsoft Dynamics CRM Online data. You can use the OData endpoint to execute HTTP requests by using a service that is based on a Uniform Resource Identifier (URI).

The OData endpoint uses the Open Data protocol. This protocol implements a ‘RESTful’ design pattern. 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.

REST works the way the Internet works. You interact with resources by using HTTP verbs such as GET, POST, MERGE, and DELETE. Various libraries can be used to process the HTTP requests and responses. REST provides a standard interface that you can use with any programming language. REST allows for either synchronous or asynchronous processing of operations. The capability to perform asynchronous operations makes REST well suited for web resources and scripts used in Microsoft Dynamics CRM 2016 and Microsoft Dynamics CRM Online.

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

OData sends and receives data by using either ATOM or JavaScript Object Notation (JSON). ATOM is an XML-based format usually used for RSS feeds. JSON is a text format that allows for serialization of JavaScript objects.

To provide a consistent set of URIs that corresponds to the entities used in Microsoft Dynamics CRM, an Entity Data Model (EDM) organizes the data in the form of records of "entity types" and the associations between them.

OData entity data model (EDM)

The Microsoft Dynamics CRM EDM is described in an OData Service Metadata document available at the following path:

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

This XML document uses conceptual schema definition language (CSDL) to describe the available data. You will download this document and use it to generate typed classes when you use managed code or as a reference for available objects when you use JavaScript.

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.

The OData protocol is not fully implemented. Some system query options are not available.

You cannot use late binding with managed code against custom entities, attributes, or relationships that did not exist when the code was written.

You will typically use WCF Data Services Client Data Service classes while programming by using managed code. These classes allow for early binding so that you get strongly typed classes at design time. The only entities available to you are those defined in the system when the classes were generated. This means that you cannot use late binding to work with custom entities, attributes, or relationships that were not included in the WCF Data Services Client Data Service classes when they were generated. 
Dynamics CRM
MS CRM 2016
Author
Blog Calendar
Blog Calendar List
2019 Jan  21  3
2018 Dec  27  4
2018 Nov  59  3
2018 Oct  12  3
2018 Sep  80  11
2018 Aug  4  2
2018 Jun  11  1
2018 Jan  49  2
2017 Sep  499  5
2017 Aug  16  1
2017 Jul  15  2
2017 Jun  43  2
2017 May  17  1
2017 Apr  31  2
2017 Mar  109  4
2017 Feb  364  4
2016 Dec  174  3
2016 Nov  320  8
2016 Oct  222  10
2016 Sep  354  6
2016 Aug  38  1
2016 Jun  1701  6
2016 May  103  3
2016 Jan  70  2
2015 Dec  384  6
2015 Nov  3  1
2015 Oct  12  1
2015 Sep  1259  6
2015 Aug  12  1
2015 Jul  116  2
2015 Jun  8  1
2015 May  20  1
2015 Apr  21  2
2015 Mar  71  3
2015 Jan  5116  4
2014 Dec  15  1
2014 Nov  2187  4
2014 Oct  75  2
2014 Sep  98  2
2014 Aug  3530  1
2014 Jul  41  2
2014 Apr  2437  12
2014 Mar  273  19
2014 Feb  225  8
2014 Jan  1510  16
2013 Dec  21  2
2013 Nov  623  2
2013 Oct  246  3
2013 Sep  10  1
2013 Aug  30  3
2013 Jul  203  1
2013 Apr  45  6
2013 Mar  1745  10
2013 Feb  291  4
2013 Jan  258  2
2012 Nov  29  2
2012 Oct  419  10
Tag Cloud
Interested in our services? Still not sure about project details? get a quote