Purpose

X3D is a file format and related access services for describing interactive 3D objects and worlds. X3D is designed to be used on the Internet, intranets, and local client systems. X3D is also intended to be a universal interchange format for integrated 3D graphics and multimedia. X3D may be used in a variety of application areas such as engineering and scientific visualization, multimedia presentations, entertainment and educational titles, web pages, and shared virtual worlds.

This part of ISO/IEC 19775 defines the Scene Access Interface (SAI), scene access interface that an abstract reference defining critical capabilities for standard language bindings that support X3D. These application programming interface (API) features can be used to interact with X3D worlds either both from within the worlds or from external programs.