[DFDL-WG] newbie question

[Tim Kimber]

The key point here is that the data format is delimited, and there is a 
requirement to validate the parsed info set against some rules ( length 
constraints, in this case).

I would
- set terminator="/"
- set lengthKind='delimited' 
- use xs:minLength and xs:maxLength facets to check the length ( or use a 
pattern facet if you must, but min/maxLength facets will use less CPU )
- switch on validation in the DFDL parser so that the length of the 
delimited value gets checked against the facets in the schema.

Other possibilities exist ( e.g. DFDL assert to check the length ) but 
this is the most efficient.

regards,

Tim Kimber, 
IBM Integration Bus Development (Industry Packs)
Hursley, UK
Internet:  kimbert at uk.ibm.com
Tel. 01962-816742 
Internal tel. 37246742




From:   "mfcplus at yahoo.com" <mfcplus at yahoo.com>
To:     Tim Kimber/UK/IBM at IBMGB, 
Date:   28/03/2014 11:25
Subject:        Re: [DFDL-WG] newbie question




a field that is 3-5 chars long alphanumeric, basically a \w{3,5}, it 
should give out parsing error if it doesnt fit by the pattern, no 
initiator terminator is /
Sent from Yahoo Mail on Android

From: Tim Kimber <KIMBERT at uk.ibm.com>; 
To: <dfdl-wg at ogf.org>; 
Subject: Re: [DFDL-WG] newbie question 
Sent: Fri, Mar 28, 2014 10:19:47 AM 

It depends on the data format. Normally a variable length field is 
terminated by a delimiter, so a data pattern/regex is not required. 
Can you describe the format in a little more detail? 

regards,

Tim Kimber, 
IBM Integration Bus Development (Industry Packs)
Hursley, UK
Internet:  kimbert at uk.ibm.com
Tel. 01962-816742 
Internal tel. 37246742




From:        Bing Lu <mfcplus at yahoo.com> 
To:        "dfdl-wg at ogf.org" <dfdl-wg at ogf.org>, 
Date:        28/03/2014 03:35 
Subject:        [DFDL-WG] newbie question 
Sent by:        dfdl-wg-bounces at ogf.org 



what's the best dfdl approache to describe  a variable length alpha 
numeric field? should i use simpletype restriction pattern, or use 
dfdl:assert testPattern? thanks in advance--
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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


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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