Restful Webservice

Hi All,

I need to create a Restful Webservice in SAP. I got the hint that I can create that in the Gateway Service Builder(t-code: SEGW). But, my concern is ,as SEGW t-code is used to create a OData service, how can i create a Restful Webservice. Is there any configuration or setting for that? or OData and restful Webservice is same? And I heard a term SData. Is this realted to Restful Webservice?

I tried to search on the forum but didn't get my answer. Any help  will be appreciated.

Thanks

Gourab Dey