CSS3 module describing features used in printed publications.
This css3 Working Draft describes features often used in printed publications. Most of the specified functionality involves some sort of generated content where content from the document is adorned, replicated, or moved in the final presentation of the document. Along with two other CSS3 modules – multi-column layout and paged media – this module offers advanced functionality for presenting structured documents on paged media. Paged media can be printed, or presented on screens.
Source: http://www.w3.org/TR/css3-gcpm/