[DFDL-WG] Fw: Scoping Rules with Schema default

[Alan Powell]

Alan Powell

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





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