Ability to add a copy of any associated PLC add on instruction or PLC UDT file to the Ignition UDT definition. This would allow for an easy way to keep them both organized in the same place together as well as helping to make sure everyone creating instances of the UDT is using the correct PLC AOI/UDT version in their programs for that UDT. Basically, creates a single point where the PLC AOI's/UDT's can reside for storage and change management at the Ignition UDT definition.