Newbie questions about Pliant

Newbie questions about Pliant

XML parser filter

I am studying the xml parser filter in the xml.pli. When I use a test.xml to
test the "test" function, the output file is not the expected translated html
file but an empty file. So I have a question: am my test way right?

test.xml
<?xml version="1.0" standalone="yes"?>
<email>
This is my email message
</email>
Message posted by maybe  on 2002/08/28 20:19:00
Make sure the tags you are using are the same defined in the default_filter 
dictionary.