Resource

In any RESTful service, structure your resources by their hierarchy. These resources are specified in the hierarchical part of the URL. All hierarchical parts are required and unique. None of them can be omitted, and all of them can appear only once. Certain parts of the URL are fixed (such as, the server name, port, and endpoint), and certain parts are parametrized. The parametrized parts are often denoted in code and documentation by curly braces.

The default URL format for the endpoint is: 
http://localhost or MachineName:port/eml
Consider, a REST service for a record. The data might be organized into a repository, which contain records, attributes, and relationships. The complete URL for the rest service is as follows: 
http://localhost:port/eml/rest/records/{repositoryName}/{id}

Sending a POST request to this URL might add a new record in a repository, while sending a GET request to this URL might retrieve the details of a particular record ID.

Parameters

REST parameters specify the variable parts of your resources: the data that you are working with. In a REST request, the resource that you are working with is specified in the URL - Uniform Resource Locator.

Request Body

In the request, send the data as a JSON object.