The format of a media file is not vocabulary. The format of a media file is possibly patentable not copyrightable. In terms of, say, music, vocabulary would b

The format of a media file is not vocabulary. The format of a media file is possibly patentable not copyrightable. In terms of, say, music, vocabulary would be notes, scales, the sound of instruments, even to some extent, phrasing. Film would be lighting effects, framing etc. etc. Basically, vocabulary is the stuff that is meaningless by itself but represent critical parts to the whole of a creative work when arranged in a meaningful fashion. So that is the crux of the question: is an API meaningful in it's own right or is it just a building block that holds little meaning by itself and exists only to be composed into meaningful works?