What Is It?

xsltproc is a command line tool for applying XSLT stylesheets to XML  documents.
It is part of libxslt, the XSLT C library for GNOME. While it was developed as
part of the GNOME project, it can operate independently of the GNOME desktop.

xsltproc is invoked from the command line with the name of the stylesheet to be
used
followed by the name of the file or files to which the stylesheet is to be
applied.

If a stylesheet is included in an XML document with a Stylesheet Processing
Instruction,
no stylesheet need be named at the command line. xsltproc will automatically
detect
the included stylesheet and use it.

By default, output is to stdout. You can specify a file for output using the -o
option. 

More Information

libxml web page: http://www.xmlsoft.org/

The amiga OS4 port was done by Edgar Schwan as part of the AmiCygnix package