Atoms: the Routeable Objects

See Figures 8.7 and 8.8 for the derivation hierarchies for the object and term hierarchies.

**Figure 8.7:** Objects
$\includegraphics{hdr/atom.ps}$

**Figure 8.8:** Terms
$\includegraphics{hdr/term.ps}$

Bill Pippin 2009-01-02