[DFDL-WG] New discriminator examples

[Alan Powell]

I have done a few optional examples and, with the except of simple types, 
the same discriminators apply

The rules
A dfdl:discriminator resolves the presence of its parent group (sequence 
or choice). Note this isn't necessarily a point of uncertainty 
If the parent group is the content model for a complex types then the 
instance of the element of the complex type also exists (that is: if the 
group is only defining the content of a complex element then the 
discriminator propagates from the group to the element automatically)

Mean that a discriminator does not resolve an optional/unordered/floating 
element of simpleType (see first optional example)



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:
Alan Powell/UK/IBM at IBMGB
To:
dfdl-wg at ogf.org
Date:
11/12/2009 16:43
Subject:
[DFDL-WG] New discriminator examples




I started building examples implementing the new discriminator semantics 
for each type of point of uncertainty . I  only got as far as simple 
choices with simple and complex elements as there seem to be lots of 
different cases. 

It is worth sharing anyway to see if we are on the right track. 


The long form discriminator is very verbose do is it worth inventing a 
short form or will it always be done by tools anyway? 



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





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 





[attachment "Discriminato- examples-1.xsd" deleted by Alan Powell/UK/IBM] 
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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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