"It differs from REST in the sense that it provides a much wider set of verbs (e.g. O(100)s rather O(4))" #readingToday  

Put simply, actions are taken on the resource where the operation is attached to. It follows the RESTful approach in the sense that it deals with resources identified by URIs and operations performed on them. It differs from REST in the sense that it provides a much wider set of verbs (e.g. O(100)s rather O(4)) and a much tighter set of parameters/properties that can be used.