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RE: Recommended way to extend Schematron?

• From: "Rushforth, Peter" <Peter.Rushforth@NRCan-RNCan.gc.ca>
• To: "Costello, Roger L." <costello@mitre.org>, "xml-dev@l..."<xml-dev@l...>
• Date: Tue, 7 May 2013 18:54:47 +0000

Hi Roger,

I recently had to do something similar.  I used the ExtensionFunction interface in saxon to define extensions based on java libraries, and was able to call them from XML schema 1.1 assert elements.  I was wondering about using "pure xpath" but I could not figure out a way to do the processing I needed to do on input coordinate lists.  So saxon extension functions helped me there.

Cheers,
Peter Rushforth
________________________________
From: Costello, Roger L. [costello@mitre.org]
Sent: May 7, 2013 2:02 PM
To: xml-dev@lists.xml.org
Subject:  Recommended way to extend Schematron?

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

• References:
  • Recommended way to extend Schematron?
    • From: "Costello, Roger L." <costello@mitre.org>