10. A method, comprising: generating, by a computing device, first extensible markup language (XML) content based on first encoded video, the first encoded video comprising video data that is expected to be formatted according to a first version of a protocol or a multimedia format; validating the first XML content according to one or more constraints of the first version of the protocol or the multimedia format on the video data, resulting in validated content that adheres to the one or more constraints; generating second XML content based on second encoded video; and validating, based on the validated content, the second XML content.
11. The method of claim 10 , wherein the one or more constraints comprise at least one of a data value constraint and a co-occurrence constraint.