Recommended way to extend Schematron?

["Costello, Roger L." <costello@mitre.org>]

Hi Folks,

 

Suppose my Schematron assertions need to do some math calculations – cosine, sine, tangent, etc.

 

I am using XPath 2.0 in my Schematron assertions. But XPath 2.0 doesn’t support functions for cosine, sine, tangent, etc.

 

What is the recommended way to extend Schematron?

 

/Roger