framework
Click on the red underlined text to get to the source
...
The methods described in this document provide a framework by which
notification of these events can be ordered.
...
... single protocol. Our goal is to provide a SIP-specific framework for
event notification which is not so complex as to be unusable for
...
... services. Note, however, that event packages based on this
framework may define arbitrarily elaborate rules which govern the
subscription and notification for the events or classes ...
... subscriber. Event packages also define further syntax and
semantics based on the framework defined by this document required
to convey such state information.
...