This specification defines a set of APIs and events for the
Widgets 1.0 Family of Specifications that enable baseline
functionality for widgets. The APIs and Events defined by this
specification defines, amongst other things, the means
to:access the metadata declared in a widget's configuration
document,
receive events related to changes in the view state of a widget,
determine the locale under which a widget is currently running,
be notified of events relating to the widget being updated,
invoke a widget to open a URL on the system's default browser,
requests the user's attention in a device independent manner,
and check if any additional APIs requested via the configuration
document's feature element have successfully loaded.