We have a transcription app that tags audio/video of debate proceedings, to connect audio-video feeds of a debate proceeding to the debate XML we need to record start and end times for a Speech / Answer ( I think the same would apply to Scene ...)
Currently the only provision to do this is via <recordedTime /> but this isnt usable since <recordedTime /> is meant to be used for an explicit mention of a time in a debate (which is not the case here ) .
THe Speech has the @period attribute but that I think may be wrong too ...since the temporalData refers to lifecycle events on the document ...while in this case we are just recording the start and end time of a speech.
I think additional attribution is required (it would have to be a xsd:dateTime, since a speech could span across 2 days) to record start and end date-time of a speech/answer/scene ...