This grammar contains the names of the people in the auto attendant's directory and a collection of sentence patterns that are the typical responses from callers to the prompt.
SRGS specifies two alternate but equivalent syntaxes, one based on XML, and one using augmented BNF format.
For this reason, SRGS grammars can be decorated with tag elements, which when executed, build up the semantic result.
SRGS does not specify the contents of the tag elements: this is done in a companion W3C standard, Semantic Interpretation for Speech Recognition (SISR).
The W3C VoiceXML standard, which defines how voice dialogs are specified, depends heavily on SRGS and SISR.