[DFDL-WG] New scoping rules with Sumans exapmles.

[Alan Powell]

All

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

It has highlighted some concerns

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'
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.
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 at 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 at IBMGB
To:
dfdl-wg at 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 at 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 () 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 () on 23 September 2009 by Alan Powell. 
Original attachment record is here ().






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





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