XML Binding Language (XBL) 2.0

This specification describes the ability to map elements to script, event handlers, CSS, and more complex content models. This can be used to re-order and wrap content so that, for instance, simple HTML or XHTML markup can have complex CSS styles applied without requiring that the markup be polluted with multiple semantically neutral div elements. It can also be used to implement new DOM interfaces, and, in conjunction with other specifications, enables arbitrary tag sets to be implemented as widgets. For example, XBL could in theory be used to implement XForms.