X3D is the result of years of effort. V4.0 represents the standardization of HTML with declarative 3D graphics.
This material is mostly supplied by ISO - Forward for X3D V3.3.
This document is the update of 19775-1 (Abstract X3D). This document will also require an updated 19775-2 (Scene Access Interface), and all of the existing 19776 and 19777 documents. It may also require additional parts to 19776.