# OPC UA struct data type?

**URL:** <https://forum.inductiveautomation.com/t/opc-ua-struct-data-type/26905>\
**Category:** Ignition\
**Created:** [July 26, 2019, 1:13pm UTC](https://forum.inductiveautomation.com/t/opc-ua-struct-data-type/26905 "2019-07-26T13:13:17Z")\
**Posts on this page:** 1\
**Showing post:** 6

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**Author:** ![JantjeBeton](https://avatars.discourse-cdn.com/v4/letter/j/ea666f/32.png) [@JantjeBeton](https://forum.inductiveautomation.com/u/JantjeBeton)\
**Post date:** [September 16, 2019, 3:39pm UTC](https://forum.inductiveautomation.com/t/opc-ua-struct-data-type/26905/6 "2019-09-16T15:39:37Z")

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I know, but I’m looking into the Source parameter of the derived tag. How to reference the UDT member with the OPC-configuration… Then when we have an exact copy, I can further specify the details I want to use in my derived tag with de Read-expression…

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