JANUS: An interactive document formatter based on declarative tags

Abstract

We have discussed the architecture of a document composition system that offers the following principal features: • It is highly interactive, providing authors with immediate feedback by means of an all-points-addressable display. •It is capable of formatting complex documents containing mixtures of text, images, and graphics. •It allows users to mark up their documents with high-level descriptive tags. • It provides a powerful and easy-to-use interface for defining the meanings of tags and specifying how various objects are to be placed on pages. • It provides a two-screen workstation in which the user can see both his original markup and the resulting formatted pages simultaneously