code: Rule Tempo() {
  		//TODO Q:2/16 3/16=60
  		//Q: "Brzo" 4/8 3/8 4/8=70 "kopanica"
  		//Q:"faster"
  		return FirstOf(
  				SequenceS(NoteLengthStrict(),
  					OptionalS(WSPS()),
  					String("="),
  					OptionalS(WSPS()),
  					DIGITS(),
  					OptionalS(WSPS()),
  					OptionalS(TempoText())
  				),
  				SequenceS(
  					String("C"),
  					OptionalS(NoteLength()),
  					OptionalS(WSPS()),
  					String("="),
  					OptionalS(WSPS()),
  					DIGITS(),
  					OptionalS(WSPS()),
  					OptionalS(TempoText())
  				),
  				DIGITS()
  		).label(Tempo);
  	}
docs: tempo ::= (note-length-strict "=" 1*DIGIT) / (%x43 [note-length] "=" 1*DIGIT) / 1*DIGIT<p>
  1*DIGIT is deprecated, kept for compatibility