This directory contains the source for the internal database structures
used by boolean, booleanC, booleanT.
It is based on the structure used within GDSII files.
But understands more types of primitives.

Files to start with:

structure: a drawing is a tree of structures that are referencing each other
elemlst: list of all elements with in one structure
element: base class for shape and reference classes.
shape :  derived from element, all primitives are derived from shape.
