Available to everyone, a community of users and developers reviews and enhances the standard with changes managed by a single person or entity. A high quality, well-supported standard emerges quickly. One popular example is Linux, controlled by Linus Torvalds. Some variations restrict commercial usage and others require fees, which can be viewed negatively. Synopsys' open source for TAP-in has no fees or commercial restrictions.
Open source is advantageous for existing standards and can benefit from fast evolution.
Community source licensing is similar to open source. A single entity manages the evolution of the standard based on community input. The standard can be used internally for development purposes by community members without fees. When community members are ready to implement commercial tools, they negotiate usage and royalties with the owner. The leading example of this model is Java from Sun Microsystems.