The official standard for Server-Sent Events is a “W3C Candidate Recommendation” at the time of writing. The latest published version is available from http://www.w3.org/TR/eventsource/.
Ian Hickson (email@example.com), Google, Inc.
The bulk of the text of this specification is also available in the WHATWG Web Applications 1.0 specification, under a license that permits reuse of the specification text.
This specification defines an API for opening an HTTP connection for receiving push notifications from a server in the form of DOM events. The API is designed such that it can be extended to work with other push notification schemes such as Push SMS.
This section describes the status ...