# Access UDT Meta Data from child tag in folder

**URL:** <https://forum.inductiveautomation.com/t/access-udt-meta-data-from-child-tag-in-folder/64550>\
**Category:** Ignition\
**Tags:** ignition81\
**Created:** [September 27, 2022, 4:50pm UTC](https://forum.inductiveautomation.com/t/access-udt-meta-data-from-child-tag-in-folder/64550 "2022-09-27T16:50:52Z")\
**Posts on this page:** 5\
**Page:** 1

<div class="post-metadata">

**Author:** ![bschroeder](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/bschroeder/32/13260_2.png) [@bschroeder](https://forum.inductiveautomation.com/u/bschroeder)\
**Post date:** [September 27, 2022, 4:50pm UTC](https://forum.inductiveautomation.com/t/access-udt-meta-data-from-child-tag-in-folder/64550/1 "2022-09-27T16:50:52Z")

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I’ve got a UDT that has an expression tag that needs to access properties on the main UDT. If I put that tag as part of the main portion of the UDT I can access the Meta and Custom Properties. However, if I put a tag in a folder and try and access the same things I get null.

```auto
MainUDT
	Meta Properties
		Documentation
	Custom Properties
		Tag
	
	Test Tag
		Expression: {[.].Documentation} <- This works
	
	Folder
		Test Tag
			Expression: {[.]..Documentation} <- This doesn't work

```

Any ideas on what is going on?

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<div class="post-metadata">

**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:** [September 27, 2022, 5:01pm UTC](https://forum.inductiveautomation.com/t/access-udt-meta-data-from-child-tag-in-folder/64550/2 "2022-09-27T17:01:18Z")

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Try `{[.]../.Documentation}` ?

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<div class="post-metadata">

**Author:** ![jlandwerlen](https://avatars.discourse-cdn.com/v4/letter/j/bc8723/32.png) [@jlandwerlen](https://forum.inductiveautomation.com/u/jlandwerlen)\
**Post date:** [September 27, 2022, 5:06pm UTC](https://forum.inductiveautomation.com/t/access-udt-meta-data-from-child-tag-in-folder/64550/3 "2022-09-27T17:06:43Z")

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Would `this.Documentation` work in this case?

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<div class="post-metadata">

**Author:** ![bschroeder](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/bschroeder/32/13260_2.png) [@bschroeder](https://forum.inductiveautomation.com/u/bschroeder)\
**Post date:** [September 27, 2022, 5:22pm UTC](https://forum.inductiveautomation.com/t/access-udt-meta-data-from-child-tag-in-folder/64550/4 "2022-09-27T17:22:18Z")

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Nope to either…

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<div class="post-metadata">

**Author:** ![bschroeder](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/bschroeder/32/13260_2.png) [@bschroeder](https://forum.inductiveautomation.com/u/bschroeder)\
**Post date:** [September 28, 2022, 5:57pm UTC](https://forum.inductiveautomation.com/t/access-udt-meta-data-from-child-tag-in-folder/64550/5 "2022-09-28T17:57:49Z")

</div>

Contacted support… they confirmed that this isn’t working. Support suggested putting a tag somewhere to hold the Meta data that we need to access. I asked if this was a bug or if the behavior I’m seeing was as intended. So far no details on that.