# How to create a multi member UDT with various data types in Vision 8.1.1 **URL:** \ **Category:** Ignition\ **Tags:** vision, ignition81\ **Created:** [December 21, 2023, 8:11pm UTC](https://forum.inductiveautomation.com/t/how-to-create-a-multi-member-udt-with-various-data-types-in-vision-8-1-1/83445 "2023-12-21T20:11:27Z")\ **Posts on this page:** 1\ **Showing post:** 14
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [December 21, 2023, 11:38pm UTC](https://forum.inductiveautomation.com/t/how-to-create-a-multi-member-udt-with-various-data-types-in-vision-8-1-1/83445/14 "2023-12-21T23:38:40Z")
You might want to check this topic: > [@Tag folder ability to have parameters](https://forum.inductiveautomation.com/t/tag-folder-ability-to-have-parameters/83147/7): > > Of course it would be nice. If the implementation doesn't crush your gateway hardware. The fundamental difference between the configuration bindings in UDT members and the bindings in expression tags and query tags, is that the latter subscribe to changes in the tags they reference, when in event driven mode, so they can re-execute to stay up to date. General tag configuration bindings only execute at tag startup or restart, which is triggered by UDT parameter writes. Alarm configuration pr… In particular, this part: > General tag configuration bindings only execute at tag startup or restart, which is triggered by UDT parameter writes. Alarm configuration properties are more tolerant, because they have to execute when an alarm triggers in order to capture associated data. Custom property bindings on member tags of a UDT simply cannot subscribe to live data changes elsewhere. For alarm properties, they execute only when an alarm fires. Not live. --- _[View the full topic](https://forum.inductiveautomation.com/t/how-to-create-a-multi-member-udt-with-various-data-types-in-vision-8-1-1/83445)._