http – Writing "Pattern URI"

I did a lot of searches on Google regarding writing "URI Pattern" to read links / requests, but I could not find anything good. Can anyone tell me some good materials to write "URI Pattern"?

FYI – This is to configure the tRESTRequest component in Talend ESB

For example

The REST endpoint is or the URI location where the REST-ful web service will be accessible for requests: ""

To read this request: "" the "URI Pattern" is "/{I.D}/"

To read this request: "" the "URI pattern is "/number"