[DFDL-WG] Ignore extraneous CRLF w/ space?

[Steve Hanson]

James

Is the problem that the dfdl:terminator '%CR;%LF;' for the end of the 
header record is firing prematurely when it encounters the CRLF in the 
data? 

If so then I'm not sure that DFDL can ignore the extra %CR;%LF; without 
using an escape scheme - but there isn't an escape scheme to use.

I would model the data as unbounded repeating records, and use a 
discriminator to distinguish the repeats from the next header.

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:   "Garriss Jr., James P." <jgarriss at mitre.org>
To:     "dfdl-wg at ogf.org" <dfdl-wg at ogf.org>, 
Date:   04/06/2013 19:56
Subject:        [DFDL-WG] Ignore extraneous CRLF w/ space?
Sent by:        dfdl-wg-bounces at ogf.org



Long IMF headers, such as Received, can be wrapped onto the next line by 
using a CRLF and then a space.  This example has 3 such wrappings:
 
Received: from smtpksrv1.mitre.org (localhost.localdomain [127.0.0.1]) 
 by localhost (Postfix) via Exchange Front-End Server webmail.afmc.af.mil 
 ([131.28.34.85]) with SMTP id 0A8791F116E for <jgarriss at mitre.org>; Tue,
  4 Jun 2013 14:03:24 -0400 (EDT)
 
How do I get DFDL to ignore these wrappings?  For most of the header, it’s 
not an issue, because I can use a lengthPattern to lookahead to the ; 
before the date starts.  But once the date starts, I have no way of 
knowing when it ends, so I need to ignore any CRLF with a space.
 
TIA
 
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