Read the original post by Michael Washington at LightSwitch Help Website
Visual Studio LightSwitch (In Visual Studio 11 Beta) allows you to access your LightSwitch application via OData. This provides access to the security and business rules of your LightSwitch application.
In this article we will demonstrate using JQuery, DataJs and KnockoutJs to create a page that will cover Creating, Reading,Updating, and Deleting data (otherwise known as CRUD) in LightSwitch. As described in the article: LightSwitch Architecture: OData (John Rivard), OData allows CRUD using the following HTTP verbs:
Create : POST
Read: GET
Update: PUT
Delete: DELETE