I spiked an implementation of a tabular data fetcher aimed at the Tab format in Wikimedia Commons. github 
Tabular data allows users to create CSV-like tables of data, and use them from other wikis to create automatic tables, lists, and graphs. mediawiki
The Tab format is new. I see it mentioned occasionally at the Common's village pump. posts
The MediaWiki action API is a web service that provides convenient access to wiki features, data, and meta-data over HTTP, via a URL usually at api.php. mediawiki
wiki-plugin-tab STATUS NAME ABOUT BUNDLED INSTALLED PUBLISHED
POST /plugin/tab/commons
Look for pages with the .tab extension within all Data namespace pages.
search
There is some interesting data on the rate at which wikipedia edits accumulate. It is hard to view because samples are not spaced uniformly in time. I look forward to the day that data like this is always subject to convenient transformation. wikipedia
Similar data better organized for all editions. page