The Model-Based User Interfaces Working Group has published the First Public Working Draft of MBUI – Task Models. Task models are useful when designing and developing interactive systems. They describe the logical activities that have to be carried out in order to reach the user’s goals. This document covers the specification of Task Models, with a meta-model expressed in UML, and an XML Schema that can be used as the basis for interchange of Task Models between different user interface development tools. Learn more about the Ubiquitous Web Applications Activity.