Robert,
              In the first paragraph of section 1.4 you that DFDL is used to describe XML files. I thought this was not the aim of DFDL as standard XML Schema can be used to describe XML files.

In the third paragraph of section 1.6 you say that 2 DFDL Schemas could be used, one to raad the data and trhe second to write it. If selectors are used this would be possible using a single DFDL Schema.

In section 2.3.1.1 you discuss specifiying multiple inputs. As this has not been discussed in any detail before I think a new entry is required on the issues list.

In the parsing example in section 6 you say in paragraph 3 that layer 2 reads bytes from layer 1 until one string has been read. How would you know that you have a one string for layer 2? In reality I don't think layer 2 is necessary. I think what you describe as layer 3 would read bytes from layer 1 as characters until a comma was found. This would then indicate that this was the end of the string for layer 3.  

Regards,

Geoff Judd
Websphere MQ Integrator Development
IBM UK Ltd
Hursley

Telephone:  +44-1962-818461
E-mail:           JUDDG@uk.ibm.com



"Robert E. McGrath" <mcgrath@ncsa.uiuc.edu>
Sent by: owner-dfdl-wg@ggf.org

18/10/2005 15:48

To
dfdl-wg@gridforum.org
cc
Subject
[dfdl-wg] New draft of DFDL primer





Greetings,

I have been plugging away on the primer document.  There are still
major holes which await development of the specification and/or
input from others.

This draft include considerable revisions based on what I learned
from you all in Boston.

I attach my current draft here.  It is also available at:

 http://verbena.ncsa.uiuc.edu/DFDL



--
---
Robert E. McGrath, Ph.D.
National Center for Supercomputing Applications
University of Illinois, Urbana-Champaign
1205 West Clark
Urbana, Illinois 61801
(217)-333-6549

mcgrath@ncsa.uiuc.edu
[attachment "new_primer_18_oct_05.doc" deleted by Geoff Judd/UK/IBM]