[DFDL-WG] Policy Driven DFDL?

[Suman Kalia]

Like the XSD standard specification, we do not intend to provide any APIs 
for DFDL standard.. It is implementation specific.. 

Suman Kalia
IBM Canada Lab
WMB Toolkit Architect and Development Lead
Tel: 905-413-3923 T/L 313-3923
Email: kalia at ca.ibm.com

For info on Message broker
http://www.ibm.com/developerworks/websphere/zones/businessintegration/wmb.html





From:   Mike Beckerle <mbeckerle.dfdl at gmail.com>
To:     "Garriss Jr., James P." <jgarriss at mitre.org>, 
Cc:     "dfdl-wg at ogf.org" <dfdl-wg at ogf.org>
Date:   07/17/2013 03:36 PM
Subject:        Re: [DFDL-WG] Policy Driven DFDL?
Sent by:        dfdl-wg-bounces at ogf.org



DFDL "the standard" says nothing about how to do this today. The way an 
implementation applies value bindings to external variables is not defined 
by the standard. Basically, nothing about APIs for driving a DFDL 
processor is mentioned in the standard.

What you suggest is an interesting mechanism especially for when there are 
many such variables and calling an API function to set them each is 
burdensome.

...mike

On Wed, Jul 17, 2013 at 2:59 PM, Garriss Jr., James P. <jgarriss at mitre.org
> wrote:
Suppose you have an XSLT stylesheet with a bunch of global variables.  
Suppose that the value of those variables must be determined outside of 
the XSLT.  How do you get the values into it?  You might use parameters, 
and pass in the values when you call the transform() function in your 
code.  But you could also use the document() function from within XSLT, 
read in an XML “policy” file that has all the values, then store the 
values in the variables.  You might call this approach policy driven XSLT.
 
Can we do policy driven DFDL?  Yes, I know that we have parameters, but is 
there a way to read in a “policy” file (whether XML or not), read the 
values, then set the variables to those values?
 
TIA

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Mike Beckerle | OGF DFDL Workgroup Co-Chair | Tresys Technology | 
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