# UDT tag instance parameters

**URL:** <https://forum.inductiveautomation.com/t/udt-tag-instance-parameters/11195>\
**Category:** Ignition\
**Created:** [February 11, 2016, 12:14pm UTC](https://forum.inductiveautomation.com/t/udt-tag-instance-parameters/11195 "2016-02-11T12:14:54Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Kleppe85](https://avatars.discourse-cdn.com/v4/letter/k/c4cdca/32.png) [@Kleppe85](https://forum.inductiveautomation.com/u/Kleppe85)\
**Post date:** [February 11, 2016, 12:14pm UTC](https://forum.inductiveautomation.com/t/udt-tag-instance-parameters/11195/1 "2016-02-11T12:14:54Z")

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Hi,  
I guess there is no easy way to do this, but I need to be certain before give up 🙂  
I’ve been trying to make an IO-browser in my application, where all OPC-tags are shown in a template repeater with status, description, scaling etc. I have also added the possibility to edit the tags from here.

Editing of single opc-items (non-UDT) is no problem, and out of the box dynamic.

Problem occurs when the tag is part of an UDT. Since I want this to be dynamic, I need a way to retrive the OPCItemPath, with the parameter-name used in the udt-instance. Like this:  
“opcserver.cpu1.{SPAddress}”.

Update:

udt.ExtendedProperties was the answer, I need to pay more attention and RTFM 🙂