It also applies to initiator, terminator, separator. The spec descriptions of these properties do not say that %ES; is not allowed, but they should do - it is not legal for any of these properties to return empty string. IBM DFDL checks for this.

We are inconsistent with how entities like %ES; are referred to in the spec. Some references use ES and some use %ES;.

Regards

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



From:        Mike Beckerle <mbeckerle.dfdl@gmail.com>
To:        Steve Hanson/UK/IBM@IBMGB,
Cc:        "dfdl-wg@ogf.org" <dfdl-wg@ogf.org>, "dfdl-wg-bounces@ogf.org" <dfdl-wg-bounces@ogf.org>
Date:        16/08/2013 19:24
Subject:        Re: [DFDL-WG] Spec bug: WSP* should not be allowed for textStandardZeroRep

---

I can find only one place in the spec where this applies which is textStandardZeroRep.

I am updating errata 2.42 with this clarification also.


On Mon, Aug 12, 2013 at 11:03 AM, Steve Hanson <smh@uk.ibm.com> wrote:
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@uk.ibm.com
tel:+44-1962-815848



From:        Mike Beckerle <mbeckerle.dfdl@gmail.com>
To:        dfdl-wg@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@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.



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


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