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The Metamodelling Language (MML) is a sub-set of the Unified Modeling Language (UML) that is proposed as the core language used to bootstrap the UML 2.0 definition initiative. Since it is metacircular, MML requires an external formal semantics in order to ground it. This paper defines the MML Calculus which is used to formally define MML and therefore provides a semantic basis for UML 2.0.

The purpose of this symposium, held in conjunction with MoDELS 2006, was to present the current state of research of the UML 2 Semantics Project. Equally important to receiving feedback from an audience of experts was the opportunity to invite researchers in the field to discuss their own work related to a formal semantics for the Unified Modeling Language. This symposium is a follow-on to our ...

Abstract thinking is a vital skill when learning computer science. Object technology and the concepts it is based upon make this skill even more crucial. However, previous research works show that students in top universities as well as experienced practitioners in industry encounter difficulties in thinking in abstract terms while practicing object oriented development. In this paper we sugges...

This paper provides an overview of the foundations of the run-time semantics underlying the Unified Modeling Language as defined in revision 2.0 of the official OMG standard. One of the problems with the format used for that standard is that the information relating to semantics is scattered throughout the text making it difficult to obtain a global understanding of how the various fragments fi...

This is the second in a series introducing the activity model in the Unified Modeling Language, version 2 (UML 2), and how it integrates with the action model [1]. The first article covered motivation and architecture for the new models, basic aspects of UML 2 activities and actions, and introduced the general notion of behavior in UML 2 [2]. The remainder of the series elaborates specific elem...

A number of forensic processes have been used successfully in the field of Digital Forensics. The aim of this paper is to model some of these processes by using the Unified Modeling Language (UML) specifically the behavioural Use Cases and Activity diagrams. This modelling gives a clear indication of the limitations of these processes. A UML-based comparison is made of two prominent DFPMs that ...

The advantage of supporting a uniform modeling approach across multiple, logical (or ontological) instantiation levels has been well documented in the literature. However, the published approaches for achieving this have focused on making it possible for classes and objects to be treated uniformly across multiple instantiation levels, but have neglected the problems involved in doing the same t...

The paper deals with a Unified Modeling Language (UML)-based approach for implementing Product Data Management (PDM) system. Such kind of system enables the management of the entire product lifecycle and related information about its design, its manufacturing and its in-service. The interest of using an UML-based approach for modeling, specifying and implementing PDM systems is detailed. Then a...

This paper reports the results of a workshop held at ECOOP’99. The workshop was set up to find answers to questions fundamental to the definition of a semantics for the Unified Modelling Language. Questions examined the meaning of the term semantics in the context of UML; approaches to defining the semantics, including the feasibility of the meta-modelling approach; whether a single semantics i...