The 3D ACIS® Modeler (ACIS) is Spatial’s prominent 3D solid modeling engine. 3D InterOp is a CAD data translation framework (Interoperability)
Scheme Reference Guide
From DocR20
The Scheme Reference Guide contains details about the Scheme Interpreter, basic Scheme extensions, and interfaces which are used by the Scheme ACIS Interface Driver Extension (Scheme AIDE) demonstration application.
This guide also explains how to write Scheme procedures and extensions (which are primitive expressions) to enhance the functionality provided in Scheme AIDE).
