Mike - the chain can be arbitrarily deep because of simple type inheritance.   Any DFDL processor / editor will have to be clever enough to keep track of the xsd where a given property value was sourced from.

Alan - some more comments, to get wording clear and ensure that all cases are covered.



Regards

Steve Hanson
Programming Model Architect, WebSphere Message  Brokers,
OGF DFDL WG Co-Chair,
Hursley, UK,
Internet: smh@uk.ibm.com,
Phone (+44)/(0) 1962-815848

----- Forwarded by Steve Hanson/UK/IBM on 14/10/2009 11:41 -----
From: Alan Powell/UK/IBM@IBMGB
To: dfdl-wg@ogf.org
Date: 14/10/2009 11:13
Subject: [DFDL-WG] Fw:  Scoping Rules with Schema default
Sent by: dfdl-wg-bounces@ogf.org







Alan Powell

MP 211, IBM UK Labs, Hursley,  Winchester, SO21 2JN, England
Notes Id: Alan Powell/UK/IBM     email: alan_powell@uk.ibm.com  
Tel: +44 (0)1962 815073                  Fax: +44 (0)1962 816898


----- Forwarded by Alan Powell/UK/IBM on 14/10/2009 11:12 -----
From: Mike Beckerle <mbeckerle.dfdl@gmail.com>
To: Alan Powell/UK/IBM@IBMGB
Date: 13/10/2009 17:47
Subject: Re: [DFDL-WG] Scoping Rules with Schema default






Looks correct.

My comments added plus fixes to a couple typos.

One item of substance.

Suppose schema 1 contains an element reference to an element declaration in schema 2, which references a simple type defined in schema 3.

Then defaults for that type can come from 3 different places. Schema 3's defaults have priority over schema 2's defaults, which have priority over schema 1's defaults.

Local property annotations can similarly come from all 3 places and must be non-overlapping/disjoint over all 3.

This 3-deep chain may go unnoticed.

On Tue, Oct 13, 2009 at 11:21 AM, Alan Powell <
alan_powell@uk.ibm.com> wrote:

I have written up the new rules for scoping in the attached document for discussion on this weeks call.


I have also updated and extended Suman's examples. Note that he dfdl properties aren't necessarily correct for the construct and are only used to indicate where they came from. I have not yet extended to multiple schema.





Alan Powell

MP 211, IBM UK Labs, Hursley,  Winchester, SO21 2JN, England
Notes Id: Alan Powell/UK/IBM     email:
alan_powell@uk.ibm.com  
Tel: +44 (0)1962 815073                  Fax: +44 (0)1962 816898





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