# \[REQUEST\] Tag Configuration Override mechanism

**URL:** <https://forum.inductiveautomation.com/t/request-tag-configuration-override-mechanism/27149>\
**Category:** Ignition Early Access\
**Created:** [August 5, 2019, 8:57am UTC](https://forum.inductiveautomation.com/t/request-tag-configuration-override-mechanism/27149 "2019-08-05T08:57:27Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![andrea.morando](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/andrea.morando/32/8039_2.png) [@andrea.morando](https://forum.inductiveautomation.com/u/andrea.morando)\
**Post date:** [August 5, 2019, 8:57am UTC](https://forum.inductiveautomation.com/t/request-tag-configuration-override-mechanism/27149/1 "2019-08-05T08:57:27Z")

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Dear all,  
I often use the UDT to structure data in a consistent way.  
I notice a strange behavior in the tag configuration: the payload used in the “system.tag.configuration()” function determines an override of the values even if they are exactly the same as those inherited from the UDT.  
Below a simple example to better explain what I mean:  
This is an UDT instance:

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/2X/e/e8e478d26f9f6392a398f7875905bd59df1a4968.png)

This is the code:  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/2X/0/009f769fe638abed9aea3ef3d907410131fe80d9.png)

This is the result:

 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/2X/e/e934387ba5173e467d770c799ab4e113c3aa1ae7.png)

As you can see, the _tagGroup_, the _valueSource_ and the _dataType_ fields are overridden.  
If I change the parent UDT configuration, the instance no longer inherites the modifications.  
It would be nice to override only the fields whose values differ.

Am I doing in the correct way?

Thanks a lot.  
Andrea

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<div class="post-metadata">

**Author:** ![andrea.morando](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/andrea.morando/32/8039_2.png) [@andrea.morando](https://forum.inductiveautomation.com/u/andrea.morando)\
**Post date:** [September 10, 2019, 9:02am UTC](https://forum.inductiveautomation.com/t/request-tag-configuration-override-mechanism/27149/2 "2019-09-10T09:02:37Z")

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Dears, any update on this topic?  
Thank you so much.