HTML5 appeared as first working draft at the World Wide Web Consortium.
Common Mistakes: Specifiying Fucntional Web Specification
Ineffective functional specification for Web projects such as Web sites, Intranets or Portals contribute largely to delays, higher costs or in applications that do not match the expectations.
Was Your Last Software Specification Really Appreciated?
If you are still trying to write system specifications in English then you are in trouble.
Functional Specification for Web Development
What are pitfalls that companies should avoid when specifying Web applications for internal or external development?