CEM-A program for visualization and discovery in email

This paper presents a lattice metaphor for knowledge discovery in electronic mail. It allows a user to navigate email using a lattice rather than a tree structure. By using such a conceptual multi-hierarchy, the content and shape of the lattice can be varied to accommodate queries against the email collection. This paper presents the underlying mathematical structures, and a number of examples of the lattice and multihierarchy working with a prototypical email collection.