private String scanYamlDirectiveValue () {
		while (peek() == ' ')
			forward();
		String major = scanYamlDirectiveNumber();
		if (peek() != '.')
			throw new TokenizerException("While scanning for a directive value, expected a digit or '.' but found: " + ch(peek()));
		forward();
		String minor = scanYamlDirectiveNumber();
		if (NULL_BL_LINEBR.indexOf(peek()) == -1)
			throw new TokenizerException("While scanning for a directive value, expected a digit or '.' but found: " + ch(peek()));
		return major + "." + minor;
	}