[DFDL-WG] elements and combining properties with their types

[Alan Powell]

Mike

I think I prefer that the element overrides the type even though it will 
look odd for in-line types.

However I don't agree with your semantics for complexTypes. Wouldn't  '
Override before scoping' be simpler and more consistent. That is, the 
element overrides the complexType but not the content. Otherwise you 
cannot have a 'local' override for an in-scope property.

For your example

      <complexType dfdl:encoding="ebcdic">
         ...
           <element name="x" dfdl:encoding="ascii">
             <complexType> 
               <sequence dfdl:separator="," dfdl:encoding="ebcdic">
                   ...
                <sequence dfdl:separator="|">
                 ... 


The "," would be ebcdic and the "|"  would be ascii

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




From:
"Mike Beckerle" <mbeckerle.dfdl at gmail.com>
To:
<dfdl-wg at ogf.org>
Date:
13/05/2009 22:25
Subject:
[DFDL-WG] elements and combining properties with their types



 
I spent some real time thinking about this issue today.
 
Attached is a memo on the subject which is big enough that I didn't want 
to just make it an email body.
 
Summary: I think current 034 semantics are broken and should be fixed 
along the lines of the element - overrides - type principle. The example 
in the scoping section is not right. 
 
But the issue has some depth to it. E.g., I think the grammar productions 
are broken currently and we need to fix those also.
 
See attached.
 
...mike
 
Mike Beckerle | OGF DFDL WG Co-Chair | CTO | Oco, Inc.
Tel:  781-810-2125  | 100 Fifth Ave., 4th Floor, Waltham MA 02451 | 
mbeckerle.dfdl at gmail.com [attachment "elements-and-types.doc" deleted by 
Alan Powell/UK/IBM] --
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