# Tag path constraint and possibilities

**URL:** <https://forum.inductiveautomation.com/t/tag-path-constraint-and-possibilities/34000>\
**Category:** Ignition\
**Tags:** ignition80\
**Created:** [April 17, 2020, 7:52am UTC](https://forum.inductiveautomation.com/t/tag-path-constraint-and-possibilities/34000 "2020-04-17T07:52:16Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![kairongsen](https://avatars.discourse-cdn.com/v4/letter/k/eb9ed0/32.png) [@kairongsen](https://forum.inductiveautomation.com/u/kairongsen)\
**Post date:** [April 17, 2020, 7:52am UTC](https://forum.inductiveautomation.com/t/tag-path-constraint-and-possibilities/34000/1 "2020-04-17T07:52:16Z")

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Greeting,

I come across with a tag with an OPC tag path as below:

tagpath=O\_Alr\_on[14] type=bool  
PLC: Schneider Protocol: OPC UA ( through OFS Server)  
the data seem to be group into an array/list

Is it possible for us to read this kind of data in Ignition (never work with this kind of tag path before -folder name/folder name/O\_Alr\_on[14])? I am not the one doing the PLC programming part so I can’t really test on this until I have the link-up between PLC and Ignition.