"[M]any readers will say, "But that's not what I mean by style X!". Indeed, it may not be." #readingToday  

After looking through the table many readers will say, "But that's not what I mean by style X!". Indeed, it may not be. But it is, as far as we can tell, what someone else means. This is an indication that different readers use style names in different ways. A primary objective of this classification is to expose these differences and enable constructive discussion.

A Field Guide to Boxology, Mary Shaw and Paul Clements