[Feature] Identification of service type [Webinos proposal] URI identifying a JavaScript API to access the service [Opera/CableLabs proposal] Service type tokens exposed from the underlying discovery mechanisms [Google Web Introducer] A service (intent) is a string identifying an interaction pattern between a Client and a Service. Examples are bookmark for sharing, link to media file, user's stream of incoming SMSs [Google Web Intents] 
A service (intent) is defined by: Action: a URI defining what to do (share, pick, view, etc) Type: the data type to perform the action on (image, url, json etc)