[DFDL-WG] Subsetting the DFDL spec

[Alan Powell]

Steve

I have made some minor changes to you proposal

- Move lengthKind pattern out separately to avoid having to implement 
regular expressions when only want delimited.
- moved hidden to expression as you cannot really set a hidden field 
without an expression.
- removed duplicate calendars

I note that the core cannot implement simple use cases like COBOL occurs 
depending on or non-adjacent length fields. Perhaps we should have 
occursCountKind and lentghKind 'embeded' and allow paths.



 
Regards

 
Alan Powell
 
Development - MQSeries, Message Broker, ESB
IBM Software Group, Application and Integration Middleware Software
-------------------------------------------------------------------------------------------------------------------------------------------
IBM
MP211, Hursley Park
Hursley, SO21 2JN
United Kingdom
Phone: +44-1962-815073
e-mail: alan_powell at uk.ibm.com




From:
Steve Hanson/UK/IBM at IBMGB
To:
dfdl-wg at ogf.org
Date:
07/07/2010 14:47
Subject:
[DFDL-WG] Subsetting the DFDL spec




Some thoughts about subsetting the DFDL spec to make it more consumable 
for readers and implementors. 

We need to decide how the use of a subset is indicated in a DFDL xsd.   It 
can be implicit by the properties referenced, or explicit up front.  The 
difference is best illustrated by an example. Let's say Bidi support is a 
subset and I don't want to use Bidi.  If using the implicit method, then I 
still need the dfdl:textBidi property to be set to 'no' even when in 
subset mode because the same xsd could be used by a full DFDL processor 
and it will expect a value.  If using explicit, then I don't need to set 
the dfdl:textBidi property at all, because the DFDL processor will never 
look for it unless the xsd is switched to include that subset. 

Here's a straw man for some subsets. 



Regards

Steve Hanson
Strategy, Common Transformation & DFDL
Co-Chair, OGF DFDL WG
IBM SWG, Hursley, UK,
smh at uk.ibm.com,
tel +44-(0)1962-815848




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 





[attachment "Subset_proposal_v1.ppt" deleted by Alan Powell/UK/IBM] --
  dfdl-wg mailing list
  dfdl-wg at 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





-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.ogf.org/pipermail/dfdl-wg/attachments/20100714/400ec877/attachment-0001.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Subset_proposal_v1_awp.ppt
Type: application/octet-stream
Size: 46592 bytes
Desc: not available
Url : http://www.ogf.org/pipermail/dfdl-wg/attachments/20100714/400ec877/attachment-0001.obj