"Ruby" are short runs of text alongside the base text, typically used in East Asian documents to indicate pronunciation or to provide a short annotation. This specification defines markup for ruby, in the form of an XHTML module. (W3C Recommendation 3...
The specifications which describes how tags within SRGS grammars may be inserted to support basic post-processing or full semantic interpretation. This is then used by VXML to support advanced features such as mixed initiative.