IMPORTANT DISCLAIMER!
IBM Software Group
Brass Bubbles: An Overview of UML 2.0 (and MDA)
Bran Selic bselic@ca.ibm.com
The technical material described here is still under development and is subject to modification prior to adoption by the OMG
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Tutorial Objectives
1. To introduce major new features of UML 2.0 2. To clarify the design intent and rationale behind UML 2.0 3. To explain the essential features of model-driven development (based on UML)
Tutorial Overview
Introduction: modeling and software Model-Driven Development A Critique of UML 1.x Requirements for UML 2.0 Foundations of UML 2.0 Architectural Modeling Capabilities Dynamic Semantics Interaction Modeling Capabilities Activities and Actions State Machine Innovations Other New Features Summary and Conclusion
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A Skeptic's View of Software Models…
PH reached X PH reached X Current PH Current PH Monitor Monitor PH PH
le enab le enab
The Problem with Bubbles…
start start PH reached X PH reached X Current PH Current PH stop stop Raise Raise PH PH Monitor Monitor PH PH
le enab le enab
start start Control Control PH PH stop stop
Control Control PH PH
Raise Raise PH PH
ble le disa b disa
ble le disa b disa
Input valve Input valve control control
"…bubbles and arrows, as opposed to programs, …never crash"
-- B. Meyer "UML: The Positive Spin" American Programmer, 1997
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Input valve Input valve control control
main () { main () { BitVector typeFlags (maxBits); BitVector typeFlags (maxBits); char buf [1024]; char buf [1024]; cout << msg; cout <> buf) { while (cin >> buf) { if ... if ...
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Models in Traditional Engineering
As old as engineering (e.g., Vitruvius) Traditional means of reducing engineering risk

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