User blog comment:Meighan/Tracking Contributions: Wiki Activity/@comment-1393830-20110908231522/@comment-3388044-20110913185107

 Fandyllic : As far as I know, yes. Before I posted this query, I tested it by using it on wikis whose content namespaces I knew, my home wiki in particular. The presence of     only in those namespaces I knew to be content namespaces seems to satisfy the sampling.

When you run the query for English Wikipedia, there is only one content namespace, and it’s the one we all know it to be.

By the way, the documentation for building your own queries can be found at mw:API:Main page. You may have to toy with the middle section of the URL to get it to work depending on where you are running it (i.e., Wikia vs MW vs WP) Have fun!