Shack : NavCenter as an HTML Widget

The NavCenter widget does not have dependencies on the window into which it is drawing. The basic idea behind shack is that we could use an object tag like,
<object data="" height=... width=...>
and have a NavCenter tree widget appear in the html. It will allow for sorting, multiple selection drag and drop, etc. Changes made to the data in foo.rdf can be sent back to a server (or the foo.rdf can be specified to be read-only, in which case, changes will not be allowed).

This will provide a very scalable version of data binding. The ability to tell the server what has changed is also very important : it allows for the next generation of HTML-based applications.