Every XSLT processor has its own set of extensions, and its own mechanisms
to allow users to define extensions. By definition, these are not
standardised. However, there has been a tendency for each implementation to
copy the extensions provided by others: those available in Xalan are pretty
well a subset of those in Saxon, which led the way on many of the popular
extensions like multiple output files and xx:evaluate(); and there is also a
third-party library of portable extensions provided at www.exslt.org.

Michael Kay
Software AG
home: Michael.H.Kay@[...].com
work: Michael.Kay@[...].com

  -----Original Message-----
  From: Márcio Fernando Keller [mailto:marcio@[...].br]
  Sent: 24 April 2002 18:20
  To: xml-dev@[...].org
  Subject: [xml-dev] Are Xalan extensions a standard feature on XSLT
processors?


  Are Xalan extensions a standard feature on XSLT processors?

  What other XSLT processor implements?

  Thanks!