# Expression syntax within an expression for alarm display path

**URL:** <https://forum.inductiveautomation.com/t/expression-syntax-within-an-expression-for-alarm-display-path/17678>\
**Category:** Ignition\
**Created:** [April 12, 2018, 5:26am UTC](https://forum.inductiveautomation.com/t/expression-syntax-within-an-expression-for-alarm-display-path/17678 "2018-04-12T05:26:04Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![declan1](https://avatars.discourse-cdn.com/v4/letter/d/67e7ee/32.png) [@declan1](https://forum.inductiveautomation.com/u/declan1)\
**Post date:** [April 12, 2018, 5:26am UTC](https://forum.inductiveautomation.com/t/expression-syntax-within-an-expression-for-alarm-display-path/17678/1 "2018-04-12T05:26:04Z")

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I’ve searched through the topics but cant find the answer to the following  
Im trying to to display my documentation meta data field in the alarm display path  
I know I can do this my manually specifiying my tagname.documentation as follows  
{[.]TAGNAME.Documentation}  
However I want to make this generic for all tags and not have to manually edit the tagname field in each alarm type  
{itemname} on its own can show my TAGNAME but how to combine  
The following “{[.]”+{itemName}+".Documentation}" just diplays the string {[.]TAGNAME.Documentation} not the contents of it.

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**Author:** ![ajacques](https://avatars.discourse-cdn.com/v4/letter/a/8edcca/32.png) [@ajacques](https://forum.inductiveautomation.com/u/ajacques)\
**Post date:** [January 23, 2021, 2:40am UTC](https://forum.inductiveautomation.com/t/expression-syntax-within-an-expression-for-alarm-display-path/17678/2 "2021-01-23T02:40:47Z")

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I’m trying to do this exact thing, @declan1, were you able to solve this problem?

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**Author:** ![bmusson](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/bmusson/32/87530_2.png) [@bmusson](https://forum.inductiveautomation.com/u/bmusson)\
**Post date:** [January 23, 2021, 4:22am UTC](https://forum.inductiveautomation.com/t/expression-syntax-within-an-expression-for-alarm-display-path/17678/3 "2021-01-23T04:22:33Z")

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[https://docs.inductiveautomation.com/display/DOC80/Tag+Paths](https://docs.inductiveautomation.com/display/DOC80/Tag+Paths)

> Tags have a built-in "this" keyword, that can be used as a reference to the tag. The keyword is useful in cases where an expression is being configured on a tag property, and you want to reference the value of another property.

For this case, try:

```auto
{this.Documentation}

```

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**Author:** ![ajacques](https://avatars.discourse-cdn.com/v4/letter/a/8edcca/32.png) [@ajacques](https://forum.inductiveautomation.com/u/ajacques)\
**Post date:** [January 26, 2021, 12:44am UTC](https://forum.inductiveautomation.com/t/expression-syntax-within-an-expression-for-alarm-display-path/17678/4 "2021-01-26T00:44:00Z")

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Awesome! Thank you @bmusson, not sure how I missed that documentation but thank you for the reply and for sharing. I tested it out and it works as expected; thanks again!