a) Just link the Xml file
You can link to your Xml file from the Html page using Server Side Includes.
If your web server is configured to enable this feature (usually this is disabled for security reasons), all you have to do is rename your Html page to .shtml and add the server command include.
foo.shtml
<html>
<head/>
<body>
</body>
</html>
bar.xml
<?xml version="1.0"?>
<Family>
<Mom>Alison</Mom>
<age>44</age>
<son>Ian</son>
<age>8</age>
<son>Seth</son>
</Family>
This will display the text Alison 44 Ian 8 Sethin your browser.
b) Rendering your Xml file as Html
Xml Html wenuxas, .
c) Xml HTML
Xml Ajax, , .