<html>
<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 10 (filtered)">
<style>
<!--
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:purple;
text-decoration:underline;}
span.EmailStyle17
{font-family:Arial;
color:windowtext;}
@page Section1
{size:595.3pt 841.9pt;
margin:72.0pt 90.0pt 72.0pt 90.0pt;}
div.Section1
{page:Section1;}
-->
</style>
</head>
<body lang=EN-GB link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>All,</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>This is a reminder/announcement of the session at the STEP
meeting in </span></font><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Bath</span></font><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'> next week on EXPRESS/UML aka Part
25 Edition 2. The session is planned for Tuesday July 6 from </span></font><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>10:30</span></font><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> to </span></font><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>12:00</span></font><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The topics for discussion are:</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>- Update on EXPRESS/UML
implementations</span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>- Discuss draft NWI for Part 25
Edition 2</span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>- Relationship of STEP and OMG
MDA/UML</span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>- Plan next actions</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>This session is following up from the </span></font><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Ft.</span></font><font
size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> Lauderdale
STEP meeting where I took an action to come up with a proposed New Work Item
for a Part 25 Edition 2. I’ve written a few paragraphs to explain an
approach for discussion at the meeting as follows:</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>A Proposal for Part 25 Edition 2</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Part 25 standardized a one-way
mapping from EXPRESS Edition 1 to UML 1.5 designed to support STEP implementation
using UML-based software engineering tools. Part 25 Edition 2 will extend that
mapping to cover EXPRESS Edition 2 constructs.</span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Part 25 Edition 2 will define a UML
1.5 representation of EXPRESS Edition 2 constructs annotated as EXPRESS. This
will enable to representation of EXPRESS and UML constructs on the same UML
diagram. In OMG terms, this is a "UML Profile for EXPRESS". This representation
will enable the use of UML tools to create EXPRESS schemas in a manner similar
to the way EXPRESS-G tools are used today. This representation will also enable
the use of UML in the specification of a complete software system that includes
EXPRESS constructs and the use of EXPRESS in the context of the OMG Model
Driven Architecture. It is expected that UML Stereotypes and Tagged Values, not
extensions to UML itself, will be used to define this aspect of Part 25 Edition
2.</span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>Part 25 Edition 2 will also include
the use of the OMG Object Constraint Language to represent EXPRESS constraints
where a straightforward representation is easily defined. It is not expected
that the full scope of the EXPRESS expression language will be covered.
However, it is expected that the subtype constraints will be covered.</span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'> </span></font></p>
<p class=MsoNormal style='text-autospace:none'><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>As UML 2 and MOF 2 are not yet
finalized and not yet commercially available in UML tools, Part 25 Edition 2 is
focused on UML 1.5. It is expected that further work in a Part 25 Edition 3
will be required to address UML2 and MOF 2 in 2005.</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Cheers,</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>David</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'> </span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Phone +44 207 704 0499</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Mobile +44 7788 561308</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>8 Highbury Place</span></font><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>, Flat 5</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>London</span></font><font size=2 face=Arial><span
style='font-size:10.0pt;font-family:Arial'>, </span></font><font size=2
face=Arial><span style='font-size:10.0pt;font-family:Arial'>UK</span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>N5 1QZ</span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> </span></font></p>
</div>
</body>
</html>