Nested models for convenient grouping and composition

From W3C XForms Group Wiki (Public)

Right now, all the instances, binds, submissions, and actions of a model are aggregated into a single, monolithic asset. There is no language support to allow authors to decompose the model into logical parts.

It would help to be able to compose a model by nesting more models within it.

The instances of nested models could be made visible to containing models.

Example markup for nested models