Djinn is a project sponsored by the UK's Engineering and Physical Sciences
Research Council to write a modeller-independent API for geometric modellers.
The Djinn project is run by the members of the Geometric
Modelling Society.
The Djinn book was published by Information
Geometers Ltd and can be obtained as a pdf
file from this link (1.8MB).
The null Djinn C binding is also available via FTP as a compressed tar set.