data exchange files), -22(SDAI), -23 (C++ SDAI binding) using ISO 10303-11:1994. The development of the NIST STEP Class Library has been stopped in the late 1990s. SCL has been improved by the BRL-CAD developers and on github under the BSD license. SCL also has an experimental Python binding. JSDAI is a complete implementation of ISO 10303-22 and ISO 10303-27 under the Open Source license AGPL. See also List of STEP (ISO 10303) parts JSDAI References 022