[DFDL-WG] Minutes from 2007-08-08 Call

[Mike Beckerle]

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>
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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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