Missing namespace for foo


This element is in a namespace, but you have not declared the namespace.


Declare the namespace at the top of your feed. For example, if you use dc:date in your feed, you will need to declare the proper dc namespace, like this:

<rss version="2.0" xmlns:dc="">

Check the full list of namespaces for the exact declaration you need.

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You might be able to find help in one of these fine resources.