It has been suggested that the quote at point 6 below:
"The PLCS consortium is planning on publishing the AP239 ARM
XML Schema through OASIS, so they don t expect implementations to be
EXPRESS-based."
is not an agreed OASIS PLCS TC position in respect of not
using EXPRESS-based implementations. Certainly, I believe that the
second half of the sentence is not a logical sequitur of the first. I
have made this second point to the receipients of the original
message.
As ever,
Tim.
*************************************************************************
*
* Dr. Timothy M. KING
CEng MIMechE PhD DIC ACGI
* Executive Consultant,
Enterprise Integration Technologies
* LSC Group,
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At 04:39 PM 12/2/2003 +0000, David Price wrote:
>Hello WG3 and WG12,
>
>
>
>We ve been working with the AP233 and AP239 teams on Part 28
Edition 2 and
XML Schema. Part 28 E2 introduces a
configuration language allowing the
production of an
XML schema to be tailored for an EXPRESS schema. The
tailoring can happen at the global, entity and/or attribute level.
The
issue that has been raised during the discussions
with AP233 and AP239 is
if, or how, this capability
should be used.
>
>
>
>I m
trying to gather business requirements and technical requirements in
this area. If you have requirements or usage scenarios in
this area, I d
appreciate hearing about them.
>
>
>
>So far, what I ve heard from these two
teams (and relayed to the Part 28
team today) is the
following:
>
>
>
>1) A single configuration to
produce a default data exchange XML Schema
for both
(or all?) APs is required. Some have said they want WG3/SC4 to
agree and mandate a single configuration for AP
implementation.
>
>2)
Exactly what the XML document looks like is not that important as a
high level, model based API will be used.
>
>3) The XML schema elements should be
recognizable as being derived from
the EXPRESS schema,
but trying to reflect the EXPRESS structure in XML is
less important than simplicity and consistency.
>
>4) Interoperability, and therefore the
same configuration, is a high
priority for AP233,
AP239 and PDM capabilities.
>
>5) The first AP233 and AP239 implementations will be based on the
ARM, not
the AIM. This may continue to be true for all
implementations as well.
>
>6) The PLCS consortium is planning on publishing the AP239 ARM XML
Schema
through OASIS, so they don t expect
implementations to be EXPRESS-based.
>
>
>
>Do other AP teams share these requirements? I agree they are not
all
completely consistent (ARM v. AIM), but
requirements seldom are. If your
requirements are
different, in what way?
>
>
>
>Cheers,
>
>David
>
>
>
>Phone +44
20 7704 0499
>
>Mobile
+44 7788 561308
>
>8
Highbury Place, Flat 5
>
>London N5 1QZ
>
>
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