Introduction to commonly use java namespace

Below are the commonly use namespace in java:

xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:p="http://primefaces.org/ui"
xmlns:s="http://jboss.org/seam/faces"
xmlns:c="http://java.sun.com/jsp/jstl/core"
xmlns:rich="http://richfaces.org/rich"
xmlns:o="http://omnifaces.org/ui"
xmlns:of="http://omnifaces.org/functions"
xmlns:cc="http://java.sun.com/jsf/composite"