[DFDL-WG] Direct Dispatch case insensitivity on matching

[Andrew Edwards]

In section 15 Choices, we define the direct dispatch method of choice 
resolution.  For the choiceDispatchKey, we make the statements that...

The expression must evaluate to an xs:string which must not be the empty 
string.

and

The resultant string must match the dfdl:choiceBranchKey property value of 
one of the element branches of the choice. This match is case insensitive.

The use of a case insensitive match can be a bit of a performance 
inhibitor, and given that direct dispatch is intended to aid performance 
optimising the model, it kinda gets in the way.  If an end user needs case 
insensitive searches then they can always define all of their branchKeys 
in one case and manually fold the dispatchKey into that case in their 
expression (toLower/toUpper).  Can I propose that we remove the criteria 
that the match be case insensitive.

The ignoreCase option may also play a part here.

Cheers,
Andy 
Andy Edwards - IBM Integration Bus - DFDL


Email:
andy.edwards at uk.ibm.com
Snail Mail: 
MP211, Hursley park, Hursley, WINCHESTER, Hants, SO21 2JN
Tel int:
247222
Tel ext:
+44 (0)1962 817222
Desk:
DE3 V17

The Feynman problem solving Algorithm
  1) Write down the problem
  2) Think real hard
  3) Write down the answer
 -- Murray Gell-mann in the NY Times

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
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.ogf.org/pipermail/dfdl-wg/attachments/20140625/770b6c07/attachment.html>