U3D

U3D (Universal 3D) is a standardized format for storing compressed 3D graphical data. It was developed by a consortium of companies including Intel, Adobe, and Boeing, and issued as an ECMA standard (ECMA-363). It is supported for embedding in PDF files.

Specs

 * ECMA standards index
 * 1st edition of standard
 * 2nd edition of standard
 * 3rd edition of standard
 * 4th edition of standard

Links

 * Wikipedia article
 * Sourceforge page