CHAPTER 12 Lists and Generated Content In the realm of CSS layout, lists are an interesting case. The items in a list are simply block boxes, but with an extra bit that doesn't really participate in the document layout hanging off to one side. With an ordered list, that extra bit contains a series of increasing numbers (or letters) that are calculated and mostly formatted by the user agent, not the author. Taking a cue from the document structure, the user agent generates the num- bers and their basic presentation. None of this content-generation could be described in CSS1 terms--and, therefore, it couldn't be controlled--but CSS2 introduced features that allow list-item numbering to be described. As a result, CSS now lets you, the author, define your own counting