The X3D working group mailing list x3d@web3d.org includes ongoing discussion of potential improvements to the X3D Schema, DTD and Schematron rule set.  This topic also covers X3D Specification sections that are autogenerated from the X3D Schema.

References:

• X3D Specifications: XML Schema and DOCTYPE Validation including Autogenerated Products
• X3D Resources: Quality Assurance (QA)
• X3D Resources: Feedback including Mantis issue tracking (two separate logins)

Web3D Consortium Members and community experts are welcome to participate.