Page Schemas screencast
www.ykatkov.name/2012/12/02/page-schemas-screencast
From the page
Saved with the link. Notes from 2007 to 2016 are mostly the page's own words, so this is probably an excerpt.
Page Schemas is a great extension for Semantic MediaWiki that allows us to generate the structure of our websites from the XML description called schema. Ive fallen in love with this extension long before it have been implemented (back then Yaron wanted to call it Semantic Schemas).