A Digital Mock-Up contains a set of component. What are the possible treatments that can be derived from this model? An analysis of the DMU content is performed to answer this question and show the lack of consistency in a DMU explaining the difficulties in performing automated treatments to derive technological and functional information about components. Then, a first set of proposals is described, aiming at improving the consistency of DMUs and making possible the automated treatments to derive functional information of components from conventional interfaces between components.