The COLLADA intermediate language specification is intended to standardize 3D data, but there’s a wide variation in the way applications work with COLLADA files. To help developers adhere to the standard and create 3D tools that work together seamlessly, the Khronos Group created the COLLADA Conformance Test Suite (CTS). The tutorial is available for download today as a PDF document. COLLADA has two levels of conformance tests, Adopters and the free Implementers tests. The implementers tests area freely available online.