# Functions
Unmarshall a XML file in smil format.
# Structs
Audio source.
Body of the smil file.
Head of the SMIL file, mostly for overall metadata.
Main is the base SMIL struct.
Meta data for the SMIL file in general.
Param contains additional informaion for Audio, Video, Text such as resolution, language, etc.
Switch element allows an author to specify a set of alternative elements from which only the first acceptable element is chosen.
Textstream it the subtitle source.
Video source.