The huge base of developers, content creators and widespread tool support indicate a large amount of existing content, and the potential for immediate content generation targeted towards the digital broadcast environment. Protects the huge body of existing content, while leveraging extant tools and investments. The complete draft specification is included as section 4 of this document. This draft is subject to change. Engine Requirements Req.
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All non-standard components of the specification were drafted by a group of companies representing a wide variety of interests and industries, and will be submitted to the appropriate standards bodies. An open comment period has been established for ATSC and ATSC member companies to participate in the definition. Additionally, the specific character encoding of an HTML document may be specified by one of three methods defined in section 5.2.2 Specifying the character encoding . 4 MET DOM and HTML frames allow addressing of Windows, and support multiple windows, but multiple windows are not required. Transparency is supported in CSS1.