[dsdl-comment] Re: FAQ: (1) NVDL versus XProc, (2) Performance of NVDL

Hi Roger,

I do not know XProc well enough but NVDL allows you to define
declaratively how you want the document to be processed and that can
mean a variable number of validate actions depending on what the XML
document contains - I do not know if XProc allows this.
But they are different technologies, it is like saying why should I need
XSLT because I can do that also in XQuery and I will get also all the
other benefits of using XQuery.

When one talks about performance penalty one needs to compare the NVDL
processing with something else. Compared with a simple parsing then yes,
there is some more processing involved. Compared with an XProc pipeline
doing the same thing then the best thing will be to run a performance
test but for instance in case of oNVDL there is very little overhead
because the NVDL processing and all the validations are performed during
a single document parsing.

Best Regards,
George

--
George Cristian Bina
<oXygen/> XML Editor, Schema Editor and XSLT Editor/Debugger
http://www.oxygenxml.com
Costello, Roger L. wrote:
> Hi Folks,
>  
> 1. I just saw this on a web site:
>  
> "I'm personally against NVDL, I think I would rather have XProc used to 
> deliver multiple schema languages because then I also have all the 
> benefits of XProc in my architecture."
>  
> I don't know enough about XProc to respond.  Can someone who is familiar 
> with XProc respond to this?
>  
> 2. Another comment that I heard is:
>  
> "The NVDL processor (dispatcher) adds an additional layer and thus 
> introduces a performance penalty.
>  
> Does anyone have performance measurements that refutes (or 
> supports) this statement?
>  
> Thanks.
>  
> /Roger
>  
--
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