Last updated on March 22, 2017
Wikipedia: Scholia are grammatical, critical, or explanatory comments, either original or extracted from pre-existing commentaries, which are inserted on the margin of the manuscript of an ancient author, as glosses. One who writes scholia is a scholiast. The earliest attested use of the word dates to the 1st century BC.
“We will use the term “scholium” to describe an article that is about another article”
A Scholia-based Document Model for Commons-based Peer Production. Joseph Corneli and Aaron Krowne