[DFDL-WG] test case length_delimited_12_03

[Steve Hanson]

Hi Mike

I think the test case can be explained by the fact that IBM DFDL does not 
yet support dfdl:lenghKind = 'endOfParent', hence any test case would try 
to use 'delimited'.

I don't have an issue with saying that encountering dfdl:lengthKind 
'delimited' while parsing  but having no delimiters in scope, is an SDE. 
It's almost certainly an indication the model is wrong.

Regards

Steve Hanson
Architect, 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:   21/06/2012 13:20
Subject:        [DFDL-WG] test case length_delimited_12_03
Sent by:        dfdl-wg-bounces at ogf.org




IBM published a set of test cases for DFDL. One of them is 
length_delimited_12_03.

I want to discuss whether this is in fact the behavior we want for DFDL.

In this example, there is data "abcde", and the default format is 
lengthKind="delimited", but no delimiters are defined anywhere. 

<!--  parent with specified length -->
       <xs:element name="myStringSeq2" dfdl:lengthKind="explicit" 
dfdl:length="5">
              <xs:complexType>
                     <xs:sequence dfdl:initiatedContent="no" 
dfdl:separatorPosition="infix"
                           dfdl:sequenceKind="ordered" dfdl:separator="" >
                           <xs:element name="Test1" type="xs:string">
                           </xs:element>
                           
                           
                     </xs:sequence>
              </xs:complexType>
 
       </xs:element>


The only way for this to parse is for the inner element Test1 to be 
delimited by the end-of-data coming from the explicit surrounding box 
created by the myStringSeq2.

I thought this should be a SDE because no delimiter is defined anywhere. I 
see that it can work, if we adopt a policy that delimited, but with no 
delimiters, means delimited by end-of-available-data. 

But, I thought that is what lengthKind="endOfData" is for. 

Can anyone comment as to why the lengthKind="delimited" but with no 
delimiter strings defined should NOT be an SDE?
--
  dfdl-wg mailing list
  dfdl-wg at ogf.org
  https://www.ogf.org/mailman/listinfo/dfdl-wg

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
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.ogf.org/pipermail/dfdl-wg/attachments/20120621/31b3fcb0/attachment.html>