The CSS Working Group has published a First Public Working Draft of CSS Fragmentation Module Level 4. This module describes the fragmentation model that partitions a flow into pages, columns, or regions. It builds on the Page model module and introduces and defines the fragmentation model. It adds functionality for pagination, breaking variable fragment size and orientation, widows and orphans.
CSS is a language for describing the rendering of structured documents (such as HTML and XML) on screen, on paper, etc.