Beyond RSS - Simple Sharing Extensions (SSE) 11/05
Simple Sharing Extensions (SSE) is a new specification that extends RSS from unidirectional to bidirectional information flows.
SSE defines the minimum extensions necessary to enable loosely cooperating applications to use RSS as the basis for item sharing—that is, the bidirectional, asynchronous replication of new and changed items among two or more cross-subscribed feeds.
For example, SSE could be used to share your work calendar with your partner. If your calendar were published to an SSE feed, changes to your work calendar could be replicated to your partner's calendar, and vice versa. As a result, your partner could see your work schedule and add new appointments, such as a parent-teacher meeting at the school, or a doctor's appointment.
SSE allows you to replicate any set of independent items (for example, calendar entries, lists of contacts, list of favorites, blogrolls) using simple RSS semantics. If you can publish your data as an RSS feed, the simple addition of SSE will allow you to replicate your data to any other application that implements the SSE specification.
SSE can also be used to extend other formats such as OPML.