# Expression values in atomic tag OPC path

**URL:** <https://forum.inductiveautomation.com/t/expression-values-in-atomic-tag-opc-path/54409>\
**Category:** Ignition\
**Created:** [December 22, 2021, 8:43pm UTC](https://forum.inductiveautomation.com/t/expression-values-in-atomic-tag-opc-path/54409 "2021-12-22T20:43:12Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![kgamble](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kgamble/32/8019_2.png) [@kgamble](https://forum.inductiveautomation.com/u/kgamble)\
**Post date:** [December 22, 2021, 8:43pm UTC](https://forum.inductiveautomation.com/t/expression-values-in-atomic-tag-opc-path/54409/1 "2021-12-22T20:43:12Z")

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I know that in a UDT I can get some instance specific variables through expressions (i.e. `{PathToTag}`). Is it possible to do the same on an atomic tag in any way?

I.e. Change the OPC Item Path to a tags path?

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/8/e/8ef8bf6967b3e174937be2e7a74597b13fdde327.jpeg)

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<div class="post-metadata">

**Author:** ![kvane](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kvane/32/22228_2.png) [@kvane](https://forum.inductiveautomation.com/u/kvane)\
**Post date:** [January 31, 2022, 4:53pm UTC](https://forum.inductiveautomation.com/t/expression-values-in-atomic-tag-opc-path/54409/2 "2022-01-31T16:53:52Z")

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No, you would likely have to create a UDT with a single opc tag and then override it with the necessary name.

Scripting could automate the process.