Re: [xsl] [ANN] DataPower Streaming XML Processing Breakthrough for XML Documents of Unlimited Size

[Jan Nelson <jan@xxxxxxxxxxxxx>]

Hi Emmanouil,

Emmanouil Batsis wrote:
> Jan Nelson wrote:
>
> > DataPower Streaming XML Processing Breakthrough Delivers Streaming XPath
> > and Streaming XSLT for XML Documents of Unlimited Size
>
> Could you please provide a direct link?

This particular press release hasn't made it to our news page yet 
(http://www.datapower.com/newsroom/) but I put the entire text of it in the 
original post.

> I was wondering if full XSLT or a subset of it is supported and how the 
> whole thing stands against Streaming Transformations for XML.

Streaming processing does only apply to a certain subset of XSLT and XPath; 
for example, an expression like "(//a)[count(//a) div 2]" can't be evaluated 
on a stream of input data without buffering the entire stream, thereby 
defeating the purpose.  DataPower's XA35 does streamability analysis on each 
stylesheet, and if it finds expressions that can't be executed on a stream, 
it logs diagnostics to that effect and falls back to normal tree-oriented 
processing.  This technology has no particular relation to STX.

Jan