What Are Feed Extensions?

What are RSS feed extensions? I have also heard the term namespaces, are they the same thing? If so, please explain.

RSS feed extensions and namespaces are the same thing. RSS was designed in such a way that allows for it to be extended. This means that publishers can create and define their own tags for RSS. It is important to do your research prior to creating a namespace, a number of namespaces already exist and you will want to avoid any redundancy. You will also want to make sure that your RSS feed is properly formed.

Learn more about namespaces and view the namespace directory that contains many of the popular RSS extensions.