OPC tags data format

Hi Guys, I’m trying to bring the OPC tags from RSlinx classic through OPC tunnel function to another dedicated ignition gateway. But I realized the when I drag the OPC tags from the OPC browsers to tags folder, all the original tag data type in RSlinx are converted by Ignition OPC module to different data type, e.g. xxxx.cfg_xxxx, xxx.alm_hihi are boolean in RSlinx, and converted to short or integer in ignition platform, and I have to do massive amount of tag properties modification on json or xml format. I wonder if there is any configuration that I can define the conversion rules? Isn’t this defined in OPC standards? thanks