All

As requested I have updated Suman's element and group reference examples for the new scoping rules.

It has highlighted some concerns
  1. We haven't really defined the scoping rules for dfdl:ref but they are assumed to be 'merge with local property definitions. Local takes precedence'
  2. dfdl:ref to defineFormat blocks are very difficult to use with parameterization.
    A dfdl:ref on an element/group reference probably has no effect. The properties would need to be converted to dfdl:setVariable .
    A dfdl:ref on a global element/group declaration is OK but any property that needs to be overridden must be defined locally as a variable.
  3. There is no easy way to provide a default for properties on global elements/groups that can be overridden. Suman had done this in his examples.





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 23/09/2009 11:24 -----
From: Alan Powell/UK/IBM@IBMGB
To: dfdl-wg@ogf.org
Date: 07/09/2009 16:55
Subject: [DFDL-WG] New scoping rules




All

Attached is the description of the new DFDL scoping rules.

We did not discuss the rules for simpleType derivations so I have assumed that it uses the same rules as simpleType reference, namely that the properties are merged and there must not be any duplicate properties specified.

I have removed most of the complicated examples as they no longer apply.



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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#### ogf-dfdl-new-scoping-rules-3.doc moved to MyAttachments Repository V3.8 (Link) on 16 September 2009 by Alan Powell.

#### ogf-dfdl-new-scoping-rules-3.doc has been re-attached on 16 September 2009 by Alan Powell


#### ogf-dfdl-new-scoping-rules-3.doc removed & duplicate added to MyAttachments Repository V3.8 (Link) on 23 September 2009 by Alan Powell.  Original attachment record is here (Link).





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