[xsl] xslt extensions - whats it about?

["peter gibbons" <peter_gibbons at hotmail dot com>]

Hello there,
I'm using sabcmd as my xslt engine.  I'm interested in finding out the best 
use for extensions, i.e. when should I be using them?

for instance if I wanted a timestamp from an operating system - could I 
retrieve it from an extension, is this a typical use for an extension.

any examples of how to call the extension and how to program the extension 
would be really helpful. I have found basic info on how to call the 
extension but very little data of what the extensions should consist of.  I 
should state that i am a perl programmer, so if an extension could exist in 
perl that would benefit me.

many thanks
Peter

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