[DFDL-WG] Minutes from 2007-08-08 Call
Mike Beckerle
beckerle at us.ibm.com
Tue Aug 14 07:38:43 CDT 2007
In conjunction with the annotated document these notes are clear, except
for 'sp165'. Perhaps someone will recapitulate the discussion briefly at
Wednesday's conference. I think only three annotations remain:
sp167 Absent and missing (expanded discussion on the wiki already)
This will be a major topic on a call.
sp172 separatorType="infix"
I'm happy to drop this strange stuff about separatorType=prefix or postfix
and just say separator means infix. However, I would note that at least
two major integration products (IBM WebSphere Transformation Extender -
formerly Mercator, and Microsoft Biztalk, have this concept, so we may end
up putting it back in. Presumably MS copied the earlier Mercator style, or
both got it from common requirements in some EDI standard.
sp173 defaultWhenMissing (expanded discussion on the wiki already)
Same topic as sp167 above. Will have a call topic to discuss.
I've added another contribution to the wiki discussion on 'require'.
This seems to be at resolution I think, which is that we can express this
using assertions. The general style of using DFDL to describe what
fixed-data syntactic constructs look like is a good one.
However, I've amended the Wiki thread on this with a further issue for
group consideration. See bottom of page:
https://forge.gridforum.org/sf/wiki/do/viewPage/projects.dfdl-wg/wiki/Require?_message=1187096164776
The 'length and occurs' proposal is an improvement, though I still have
reservations to discuss; likewise the 'opaque data' proposal.
For a call, this week or soon. I will send out an agenda.
Mike Beckerle
STSM, Architect, Scalable Computing
IBM Software Group
Information Platform and Solutions
Westborough, MA 01581
direct: voice and FAX 508-599-7148
assistant: Pam Riordan
priordan at us.ibm.com
508-599-7046
"Simon Parker" <simon.parker at polarlake.com>
Sent by: dfdl-wg-bounces at ogf.org
08/13/2007 10:56 AM
To
<dfdl-wg at ogf.org>
cc
Subject
Re: [DFDL-WG] Minutes from 2007-08-08 Call
In conjunction with the annotated document these notes are clear, except
for 'sp165'. Perhaps someone will recapitulate the discussion briefly at
Wednesday's conference. I think only three annotations remain:
sp167 Absent and missing (expanded discussion on the wiki already)
sp172 separatorType="infix"
sp173 defaultWhenMissing (expanded discussion on the wiki already)
I've added another contribution to the wiki discussion on 'require'.
The 'length and occurs' proposal is an improvement, though I still have
reservations to discuss; likewise the 'opaque data' proposal.
Regards,
Simon
From: dfdl-wg-bounces at ogf.org [mailto:dfdl-wg-bounces at ogf.org] On Behalf
Of Mike Beckerle
Sent: 08 August 2007 18:00
To: dfdl-wg at ogf.org
Subject: [DFDL-WG] Minutes from 2007-08-08 Call
MikeB, Geoff Judd, Alan Powell attended.
Continued through SP's comments.
sp37 - got it.
sp45 - agree. This whole part to be rewritten.
sp115 - ok. strict and "lax" as enums. No built-in default - we never use
defaults in the processor itself. Only in the predefined formats.
sp118 - ok
sp123 - Proposal to simplify length, lengthKind, lengthUnits, and also
occursKind, occursPath, occursPathUnits needed. (along the lines of
byteCount, itemCount, length='delimited' enum, etc.)
sp154 - Need specific proposal to eliminate hexBinary and use what for
opaque (consider also string with encoding='bytes'. ) Or introduce a
dfdl:byteString type or dfdl:opaque type. (derived type - just a standard
name).
sp158 - see sp123
sp165 - needed to have composition property for enclosing groups and or
end-of-data. Regexp doesn't fix this.
Mike Beckerle
STSM, Architect, Scalable Computing
IBM Software Group
Information Platform and Solutions
Westborough, MA 01581
direct: voice and FAX 508-599-7148
assistant: Pam Riordan
priordan at us.ibm.com
508-599-7046
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