The Content Management Systems are usually developed in the idea of giving the best and optimized solution for content management. There may be at times that you have to deal with the code yourself and that is when standards come into picture. The setting up of the CMS in the right way and configuring it rightly most often will help you in getting a pretty much clean code in the back end. The generated code mostly are modularized and the CSS based ones are divided as objects clearly, and html and w3 standards are mostly compliant in the pages. This does not include the third party extensions or plug-ins though.