Re: Syntax Free Models

["Tim McGrath" <tmcgrath@tedis.com.au>]

this looks very useful, unfortunately the graphics got lost somewhere (at least
for me).

can this be posted to the ebxml website?

Martin Bryan wrote:

> Keith
>
> In response to your helpful comments I've tried to correct some of the
> errors relating to Information Sequence naming that you kindly pointed out
> in the earlier draft of my paper on a Syntax-Neutral Definition of Business
> Semantics, and to clarify why I feel sequences are a vital component of the
> model. Your views on these clarifications would be much welcomed, as would
> anyone elses.
>
> I have also taken this opportunity of extending the paper with a first draft
> on the way I would like to see definitions of Information Messages,
> Information Sets and Information Units exchanged. Whilst I intend, when I
> get some free time, to extend this by adding ISO11179-based neutral
> definitions, the initial XML models and examples should help you to see
> where I am coming from.
>
> I still need to work out models for recording the relationships between
> Informatation Units (and maybe even Information Sets) and for recording the
> relationships between Information Units and datatypes, but I would like to
> start getting some initial reaction to what I am proposing before completing
> these sections.
>
> I still have doubts about the relevance of using state to record the
> relationship between information units, as you propound. To me there is a
> fundamental difference between what goes in the definitions and what goes in
> the messages. In the definitions you need to tell people that the intention
> is that the contents of one type of information unit should be derived from
> another type of information unit. For a message instance you need to state
> that this specific information unit was derived from that specific
> information unit. What is needed then is some way of checking that the
> derivation in the instance conforms to the derivation rules in the model. To
> date I have not had time to work out a good way to do latter part of the
> process. I am wondering if XSLT templates might provide a guide, but am
> unsure yet how to declare this in a syntax neutral manner. An alternative
> could be to use some of the techniques for requesting the monitoring of
> events that were proposed for ISENS, etc, but at present I cannot see a way
> to make this work over the long periods required for message definition
> maintenance.  I have yet to find time to try to read up on the UML State
> Machine work. Is there a simpleton's explanation of this available that
> would be understandable to someone without a background in UML? Any
> suggestions on how to approach these problems would be most welcome.
>
> Martin Bryan
> Technical Manager, The Diffuse Project
> Project Manager, CEN/ISSS EC Workshop DAMSAD project group
> ----------------------------------------------------------------------------
> ---------------------------------------
> The SGML Centre, 29 Oldbury Orchard, Churchdown, Glos GL3 2PU, UK
> Phone/Fax: +44 1452 714029  E-mail: mtbryan@diffuse.org
>
> For details of The SGML Centre visit http://www.sgml.u-net.com
>
> For details of the EU-funded DIFFUSE project visit http://www.diffuse.org
>
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--
regards
tim mcgrath
TEDIS   fremantle  western australia 6160
phone: +618 93352228  fax: +618 93352142

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