Hi Simon
That looks better.
I'd still like to see an even simpler
introductory diagram, if that is possible, which while not showing 100%
of XML Schema constructs, shows enough to give the user a good idea of
the key schema objects involved. The existing diagram in draft 31 section
5, but with the 'dimension' box removed, is very attractive to first time
users. It introduces elements which can be of simple type or complex type,
the latter consisting of a group being either sequence or choice, which
contains a sequence of elements or wildcards. Note no mention of particles
at this point.
It may not be possible to accomodate
such a simple diagram with the full diagram without contradictory terminology?
But I think we should try.
FWIW I use a very similar diagram to
explain the IBM MRM model to first-time users.
Regards, Steve
Steve Hanson
WebSphere Message Brokers
Hursley, UK
Internet: smh@uk.ibm.com
Phone (+44)/(0) 1962-815848
"Simon Parker"
<simon.parker@polarlake.com>
Sent by: dfdl-wg-bounces@ogf.org
07/02/2008 11:54
|
|
To
| <dfdl-wg@ogf.org>
|
|
cc
|
|
|
Subject
| [DFDL-WG] DFDL Schema abstract data
model 4 |
|
Good morning.
As discussed yesterday, here is a fresh version
with improvements and corrections applied.
I added a note to the Discussion section,
reproduced here for convenience.
---
Yesterday's conference expressed the view
that the version 3 model contained more detail than was useful. Version
4 removes some of the new abstractions to bring it closer to version
2, but retains most of the relationships.
The new naming conventions (Global*, *Reference,
*Definition) didn't find favour, and this version uses established names
for abstractions discussed in the XML Schema specification.
Other changes correct errors and misunderstandings:
only simple types may have explicit base types; DFDL doesn't support All
groups or explicit Group constructs in groups; some associations were incorrectly
described as aggregations.
Dfdl annotations can be used at any annotation
point. There are some restrictions, but this model cannot show details
clearly so they are left for a different form of presentation or for later
addition.
---
Regards,
Simon
Simon Parker
Software Consultant
PolarLake
80 Harcourt Street
Dublin 2, Ireland
Phone +353 1 449-1075
Fax +353 1 449-1011
Web http://www.polarlake.com/
The information transmitted in this email
is intended for the addressee only and may contain confidential and/or
privileged material. Any review, retransmission, dissemination, reliance
upon or other use of this information by persons or entities other than
the addressee is prohibited. If you think, for any reason, that this message
may have been addressed to you in error, we would ask you to notify the
sender immediately by return email and delete the material. PolarLake Limited
| Registered in Dublin, Ireland | Number 357324 | Registered office as
above.
--
dfdl-wg mailing list
dfdl-wg@ogf.org
http://www.ogf.org/mailman/listinfo/dfdl-wg
Unless stated otherwise above:
IBM United Kingdom Limited - Registered in England and Wales with number
741598.
Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6
3AU