Binary package “libsaxon-java” in ubuntu focal

Saxon XSLT Processor

 The saxon package is a collection of tools for processing XML documents and
 implements the XSLT 1.0 recommendation, including XPath 1.0, in its entirety.
 .
 Saxon is known to work well for processing DocBook XML documents
 with the DocBook XSL Stylesheets. Related packages make the process
 straightforward.