jsjenkins, in software a framework is usually defined as (From Wikipedia):

   "...a re-usable design for a software system"

This "framework" encapsulates a lot of iPhone-ish style attributes (like buttons, toolbars, lists, sliding/animation & icons) as well as a good number of webkit's(and mobile safari's) new css / js functions.

Additionally we plan to support:

Gesture Events (this should be iPhone specific enough for you)

& Mobile Safari's Offline Database API