[DFDL-WG] how to do mix of case sensitive and insensitive delimiters

[Garriss Jr., James P.]

So which is worse, Steve, a bunch of extra properties in GeneralPurposeFormat, or making your schema designers resort to workarounds like this:

        <xs:sequence dfdl:separator="" dfdl:terminator="end" dfdl:ignoreCase="no">
                <xs:element name="weird" type="xs:string" dfdl:initiator="start" dfdl:ignoreCase="yes" dfdl:lengthKind="delimited"/>
        </xs:sequence>

Or this:

- wrap the element in a group
- set dfdl:ignoreCase to 'no' on the group.
- set dfdl:ignoreCase to 'yes' on the element.
- put the terminator on the group and the initiator on the element.

Do you really want your schema designers to have to do things like this?   It seems to me that a good design principle is to make life simpler for your users, not harder.


From: Steve Hanson [mailto:smh at uk.ibm.com]
Sent: Thursday, June 20, 2013 7:33 AM
To: Garriss Jr., James P.
Cc: dfdl-wg at ogf.org; dfdl-wg-bounces at ogf.org; Tim Kimber
Subject: Re: [DFDL-WG] how to do mix of case sensitive and insensitive delimiters

If we adopt that approach we end up with an explosion of properties. It's not just ignoreCase. There's encoding and its related properties too. We decided that encoding related properties applied per object, not per delimiter.

Regards

Steve Hanson
Architect, IBM Data Format Description Language (DFDL)
Co-Chair, OGF DFDL Working Group<http://www.ogf.org/dfdl/>
IBM SWG, Hursley, UK
smh at uk.ibm.com<mailto:smh at uk.ibm.com>
tel:+44-1962-815848



From:        "Garriss Jr., James P." <jgarriss at mitre.org<mailto:jgarriss at mitre.org>>
To:        Tim Kimber/UK/IBM at IBMGB, "dfdl-wg at ogf.org<mailto:dfdl-wg at ogf.org>" <dfdl-wg at ogf.org<mailto:dfdl-wg at ogf.org>>,
Date:        20/06/2013 12:21
Subject:        Re: [DFDL-WG] how to do mix of case sensitive and        insensitive        delimiters
Sent by:        dfdl-wg-bounces at ogf.org<mailto:dfdl-wg-bounces at ogf.org>
________________________________



All the various solutions proposed seem so convoluted.  Why not do the simple and obvious?  Something like:

dfdl:ignoreInitiatorCase=”yes”  dfdl:ignoreTerminatorCase=”no” dfdl:ignoreSeparatorCase=”no”  dfdl:ignoreElementCase=”yes”

From: dfdl-wg-bounces at ogf.org<mailto:dfdl-wg-bounces at ogf.org> [mailto:dfdl-wg-bounces at ogf.org] On Behalf Of Tim Kimber
Sent: Thursday, June 20, 2013 5:34 AM
To: dfdl-wg at ogf.org<mailto:dfdl-wg at ogf.org>
Subject: Re: [DFDL-WG] how to do mix of case sensitive and insensitive delimiters

The other way to do this is
- wrap the element in a group
- set dfdl:ignoreCase to 'no' on the group.
- set dfdl:ignoreCase to 'yes' on the element.
- put the terminator on the group and the initiator on the element.

Or the other way round if it works better that way.

regards,

Tim Kimber, DFDL Team,
Hursley, UK
Internet:  kimbert at uk.ibm.com<mailto:kimbert at uk.ibm.com>
Tel. 01962-816742
Internal tel. 37246742




From:        Mike Beckerle <mbeckerle.dfdl at gmail.com<mailto:mbeckerle.dfdl at gmail.com>>
To:        dfdl-wg at ogf.org<mailto:dfdl-wg at ogf.org>,
Date:        19/06/2013 23:42
Subject:        [DFDL-WG] how to do mix of case sensitive and insensitive delimiters
Sent by:        dfdl-wg-bounces at ogf.org<mailto:dfdl-wg-bounces at ogf.org>
________________________________





I have a wierd case where the initiator wants to be case insensitive matching, but the terminator wants to be case sensitive.

The only way I can think of dealing with this is to use the initiator, but handle the length via lengthKind='pattern' to grab the value, doing lookahead so it will stop before the terminator.
Then an empty sequence with a case sensitive terminator to pick off that part of the data stream.

--
Mike Beckerle | OGF DFDL Workgroup Co-Chair | Tresys Technology | www.tresys.com<http://www.tresys.com/>
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