You can create an Informatica REST web service that returns data to a web service client in JSON or XML format.
An Informatica REST web service is a web service that receives an HTTP request to perform a GET operation. A GET operation retrieves data. The REST request is a simple URI string from an internet browser. The client limits the web service output data by adding filter parameters to the URI.
Define a REST web service resource in the Developer tool. A REST web service resource contains the definition of the REST web service response message and the mapping that returns the response. When you create an Informatica REST web service, you can define the resource from a data object or you can manually define the resource.