[DFDL-WG] Spec bug: WSP* should not be allowed for textStandardZeroRep

[Steve Hanson]

Agreed to take an errata to disallow %WSP*; on its own in places where it 
is currently allowed but %ES; is not allowed.

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:   Steve Hanson/UK/IBM
To:     Mike Beckerle <mbeckerle.dfdl at gmail.com>, 
Cc:     dfdl-wg at ogf.org, dfdl-wg-bounces at ogf.org
Date:   12/08/2013 15:53
Subject:        Re: [DFDL-WG] Spec bug: WSP* should not be allowed for 
textStandardZeroRep


Mike

%WSP*; is useful tacked onto the end of string literal properties that 
don't allow %ES; so I think the correct restriction is that if a property 
does not allow %ES; it should not allow %WSP*; on its own. 

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:   Mike Beckerle <mbeckerle.dfdl at gmail.com>
To:     dfdl-wg at ogf.org, 
Date:   10/08/2013 17:02
Subject:        [DFDL-WG] Spec bug: WSP* should not be allowed for 
textStandardZeroRep
Sent by:        dfdl-wg-bounces at ogf.org




We don't allow %ES; for textStandardZeroRep. But we do allow character 
class entities like %NL; %WSP; %WSP+; and... problematic: %WSP*;

I claim if you don't allow %ES; you should not allow %WSP*; because it 
matches zero-or-more, allowing an empty-string to match in principle. 

Leaving off WSP* only eliminates the zero-characters option, as WSP+ is 
available.

There are probably other places in the spec that have this same issue. 
Basically, anyplace that %ES is disallowed but the other character class 
entities are allowed.



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