Discrete Geometry Kernel (DGK) - Advanced repair and editing for complex assemblies. The Discrete Geometry Kernel is a C++ library for repairing and editing complex assemblies commonly  found in engineering and scientific simulation. Tolerant repair tools, including stitching and imprinting,  enable accurate repair of model defects. Non-manifold support enables multiple volume bodies to be  effectively handled. Integration into a modelling environment is aided by automatic parent-child  tracking which allow faces and edges to be related to the original model even after extensive  modifications.   Partial Feature List: • Curve to curve stitching • Curve to surface imprinting. • Angle and curvature based feature edge identification. • Intersections • Refinement, coarsening. • Hole filling. • High order subdivision. • Advanced topology management. • Low level (facet and node) and high level (curve and surface) editing. • Construction of solid primitives, surfaces and curves. • Portable, ANSI C++ source code. • In addition to the high level interfaces, full low level support is provided to enable customisation and development of new algorithms.