Another potential expansion could be adding Category-namespace to the clickstream.

There was a question to Research how readers use categories (link). I believe that clickstream could help answer some of these questions if Category-pages were included.

Copying the question in case the link to the original request breaks:

I am interested to find out whether Readers actually use Categories, and I was hoping your research could help me. My thoughts are

• 99 % are mostly unused (except by web crawlers or bots)
• Hardly any readers navigate up and downs categories
• It is rare for a category to be used on an article page
• The more categories (such as wikipedia:Albert Einstein ) on a page the less likely they are to be used, and the more likely there is to be conflict (exception treaties) because of nationalism