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What is OData?


OData(Open Data Protocol) is a standard that defines set of best practices for creating and consuming RESTful APIs.

  • OData uses HTTP protocol for CRUD operations(HTTP POST, HTTP GET, HTTP PUT,  HTTP DELETE)
  • OData uses URI for resource identification. That means you can select the content/data using the URI, g. to get SharePoint list object - http://SiteURL/_api/web/lists/getbytitle('ListName')
  • OData uses Atom XML or JSON format for response of the data
  • Why do we need OData? – There is so much content/data on different platforms and in different formats, there’s no any common way to access them and OData defines a common approach to access those data
  • Since SharePoint 2013, Microsoft has improved OData support in SharePoint. It supports full REST based interface so that developers can access (CRUD Operations) SharePoint content using REST API.


  • Response of OData request can be in Atom XML or JSON format
  • Generally Atom is used with managed clients and JSON is used with JavaScript/AJAX client
  • HTTP header of the REST request should contain the format specified otherwise Atom will be taken as it is default format of the response. 


  • We can make the SharePoint data available on non-Microsoft platform and mobile devices as well.
  • SharePoint can also connect and pull data from other OData sources.

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