http://www.peertopatent.org/patent/34/prior_art/list The invention relates to a method for comparing computer-based and data-processing models of a complex system, with a first model and a second model of the system, whereby the models reflect a model of a system behavior by means of predefined objects which represent activities and units within the system. The inventive method comprises the steps of comparing the models and destination of corresponding respective predefined objects of the first and second model, detecting differences in attributes of corresponding predefined objects and outputting the differences to a user. The use of predefined objects, i.e. of objects that pertain to a known set of types, enables a more efficient comparison of models than in unstructured models. en-us Comparison of models of a complex system Title: Detecting Changes in XML Documents <br/>ISBN: 0-7695-1531-2<br/>Description: A paper describing an algorithm to diff XML documents. XML documents often represent a model of a complex system. Mon, 15 Oct 2007 18:16:01 -0700 http://www.peertopatent.org/prior_art/89/detail Comparison of models of a complex system Title: Transaction Level Modeling: An Overview<br/>ISBN: <br/>Description: Paper providing an overview of comparing different types of models, and their attributes. Thu, 27 Sep 2007 00:02:55 -0700 http://www.peertopatent.org/prior_art/84/detail