[DFDL-WG] whitespace in DFDL annotations: right now regex is xs:string, expression is xs:token

[Steve Hanson]

The type called DFDLExpressionOrPatternOrNothing only makes sense for use 
in one place - the element value of an assert or discriminator.

Regards

Steve Hanson
Architect, IBM Data Format Description Language (DFDL)
Co-Chair, OGF DFDL Working Group
IBM SWG, Hursley, UK
smh at uk.ibm.com
tel:+44-1962-815848



From:   Suman Kalia <kalia at ca.ibm.com>
To:     Mike Beckerle <mbeckerle.dfdl at gmail.com>, 
Cc:     dfdl-wg at ogf.org, dfdl-wg-bounces at ogf.org
Date:   19/03/2013 17:29
Subject:        Re: [DFDL-WG] whitespace in DFDL annotations: right now 
regex is xs:string, expression is xs:token
Sent by:        dfdl-wg-bounces at ogf.org



Mike - I am not sure but my gut feeling is that it would start with the 
most restrictive one first.  i.e  If empty string    ( assuming it has 
length facet 1) -  would match Nothing ,   then xsd:token which is 
restricted form of xs:string.  I think you are going to get string with 
white spaces collpsed  ( xsd:token) if it not empty string.  You can run 
few tests to see the behavior.. 


Suman Kalia 
IBM Canada Lab 
WMB Toolkit Architect and Development Lead 
Tel: 905-413-3923 T/L 313-3923 
Email: kalia at ca.ibm.com 

For info on Message broker 
http://www.ibm.com/developerworks/websphere/zones/businessintegration/wmb.html 






From:        Mike Beckerle <mbeckerle.dfdl at gmail.com> 
To:        dfdl-wg at ogf.org, 
Date:        03/19/2013 12:43 PM 
Subject:        [DFDL-WG] whitespace in DFDL annotations: right now regex 
is xs:string, expression is xs:token 
Sent by:        dfdl-wg-bounces at ogf.org 




This came up on the call. The schemas I have for DFDL annotations have 
DFDLRegularExpression as an xs:string, and DFDLExpression as an xs:token. 
I have no clue what a union of these types behaves like. But we have a 
union called DFDLExpressionOrPatternOrNothing which is a 3-way union of 
DFDLExpression, DFDLRegularExpression, and EmptyString (which is also 
derived from xs:string but has length facet of 0 as well. 


-- 
Mike Beckerle | OGF DFDL Workgroup Co-Chair | Tresys Technology | 
www.tresys.com
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