code: Rule VoiceSubname() {
  		return SequenceS(
  				FirstOfS(IgnoreCase("subname="),
  						IgnoreCase("sname="),
  						IgnoreCase("snm=")),
  				String("\""),
  				ZeroOrMore(NonQuote()).label(VoiceSubname).suppressSubnodes(),
  				String("\""));
  	}
docs: \n in name = linefeed
  
  voice-subname ::= ("subname=" / "snm=") %x22 *non-quote %x22