Can you do this (tabstops)?

You have dynamic text field which is set up to render text as HTML and you are loading in some text from xml. The goal is to display text like so with tab stops on one line:

One                       Two                       Three

Actionscript:

dynamicText.htmlText =  xml.someText;

XML:

<?xml version="1.0" encoding="UTF-8"?>
<xml>
    <someText>
        <![CDATA[ One Two Three ]]>
    </someText>
</xml>

How to implement tabstops.
I know that actionscript 3 supports HTML tag <textformat> with atribute tabstops. How to use them?
Any thoughts?

Thank you!