The WebCGM 2.1 Test Suite is built on top of the WebCGM 2.0 Test Suite by the addition of a module of tests for the new functionality that WebCGM 2.1 added to WebCGM 2.0. The references below point to: a matrix of implementation results for the incremental new functionality of WebCGM 2.1; and, a matrix of implementation results for the WebCGM 2.0 standard, compiled at the time of standardization of WebCGM 2.0.