HyperText Mark-up Language is the language of the Web. It's how we add images, text, and hyperlinks to Web pages. Defines the type, name, and default value for each of its fields. An object-oriented toolkit for developing interactive, 3D graphics applications. It also defines a standard file format for exchanging 3D data among applications.
Open standards are protocols that everyone has free access to develop with.
HTML and VRML are both open standards. Any simplified programming language. Usually scripting languages are used in conjunction with other languages, and our built custom for specific functions. PERL is a scripting language often used to extend the Web's capabilities. VRMLscript and JavaScript are are scripting languages used to extend VRMLs capabilities.