[DFDL-WG] DFDL Example for 2D arrays

[Alan Powell]

Hello Jyoti

Welcome to DFDL

DFDL V1 only directly supports single dimension arrays through the use of 
the occursxxx properties defined in section 19. A 2D array must be defined 
as an array of array. The following is a simplified version of the example 
in section 20 that shows a fixed number of rows and columns.

        <xs:element name="rows" 
                    dfdl:occursCountKind="explicit" 
                    dfdl:occursCount="5">
           <xs:complexType>
             <xs:sequence>
               <xs:element name=?cols? type=?xs:float? 
                    dfdl:occursCountKind=?explicit?
                    dfdl:occursCount=?10? />
             </xs:sequence>
          </xs:complexType>
                 </xs:element> 


In DFDL V1 we have primarily concentrated on structured commercial formats 
so have not thought too much about image files etc althought it is 
intended that DFDL is capable of defining these types of data.

Alan Powell

 MP 211, IBM UK Labs, Hursley,  Winchester, SO21 2JN, England
 Notes Id: Alan Powell/UK/IBM     email: alan_powell at uk.ibm.com 
 Tel: +44 (0)1962 815073                  Fax: +44 (0)1962 816898




From:
"Jyotishman Pathak" <jyotishman.mayo at gmail.com>
To:
dfdl-wg at ogf.org
Date:
23/12/2008 21:38
Subject:
[DFDL-WG] DFDL Example for 2D arrays



Hello all,

I am a newbie in DFDL, and trying to grasp some of the key aspects going 
through the latest core spec: 
http://forge.gridforum.org/sf/go/doc15397?nav=1

Pardon me if this question is nonsensical, but I wonder if there are any 
examples of how a DFDL schema/document will look like if Matrix.data is 
representing a 2D array? Or if there are any sample DFDL documents for an 
image file (jpg, png etc.). The simple example that you have in pages 
19--20 of the core spec is indeed helpful to understand the guts of the 
idea, but I would like to see somewhat more complex examples.

I look forward to your help.

Thanks,
- Jyoti

--
  dfdl-wg mailing list
  dfdl-wg at ogf.org
  http://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/20090106/619c3b3b/attachment.html