xsltexec applies XSLT rules to an XML representation of an AST,
called an XML AST. XSLT rules are defined in a input
file. In the XSLT file, predefined XSLT rules offered by XevXML
are also available without specifying the absolute paths of the
XSLT files installed to the system. It reads an input XML
AST and an XSLT file from the input files, and prints an output
XML AST to the output.