code: function parse_BrtXF(data, length) {
  	var tgt = data.l + length;
  	var ixfeParent = data.read_shift(2);
  	var ifmt = data.read_shift(2);
  	data.l = tgt;
  	return {ixfe:ixfeParent, numFmtId:ifmt };
  }
docs: /* [MS-XLSB] 2.4.824 BrtXF