Here’s the namespace declarations for the JSF 2.0 tags:
<!DOCTYPE HTML> <h:html lang="en" xmlns="http://www.w3.org/1999/xhtml" xmlns:h="http://java.sun.com/jsf/html" xmlns:f="http://java.sun.com/jsf/core" xmlns:ui="http://java.sun.com/jsf/facelets">
For JSF 2.2 the URLs have changed. See post here.