# Perspective: Fallback to binding value in Transform

**URL:** <https://forum.inductiveautomation.com/t/perspective-fallback-to-binding-value-in-transform/39482>\
**Category:** Ignition\
**Tags:** ignition80, perspective\
**Created:** [October 8, 2020, 4:11am UTC](https://forum.inductiveautomation.com/t/perspective-fallback-to-binding-value-in-transform/39482 "2020-10-08T04:11:46Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![nminchin](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/nminchin/32/6911_2.png) [@nminchin](https://forum.inductiveautomation.com/u/nminchin)\
**Post date:** [October 8, 2020, 4:11am UTC](https://forum.inductiveautomation.com/t/perspective-fallback-to-binding-value-in-transform/39482/1 "2020-10-08T04:11:46Z")

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v8.1rc1

How can I fall back to the previous value when using a transform?  
For example,

1. if you have a single transform, fall back to the binding value.
2. if you have chained transforms, fall back to the previous transform, or to the binding value if it’s the first transform in the chain

Below, I want to fall back to the value of the tag, if it’s not false or true (as in this case, it’s going to be a string value already)  
 ![image](https://us1.discourse-cdn.com/inductiveautomation/original/3X/8/8/88bcc537df839076eb99bc4df2baeb3287d92a53.png)

For now, I’ve reverted back to using the Expression transform and a `case` statement.

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<div class="post-metadata">

**Author:** ![kgamble](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kgamble/32/8019_2.png) [@kgamble](https://forum.inductiveautomation.com/u/kgamble)\
**Post date:** [October 8, 2020, 6:53am UTC](https://forum.inductiveautomation.com/t/perspective-fallback-to-binding-value-in-transform/39482/2 "2020-10-08T06:53:41Z")

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Does having `{value}` in your fallback like In the image not work?

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**Author:** ![Kenneth\_Dean](https://avatars.discourse-cdn.com/v4/letter/k/a3d4f5/32.png) [@Kenneth\_Dean](https://forum.inductiveautomation.com/u/Kenneth_Dean)\
**Post date:** [November 1, 2024, 10:49am UTC](https://forum.inductiveautomation.com/t/perspective-fallback-to-binding-value-in-transform/39482/3 "2024-11-01T10:49:31Z")

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Anyone have an answer for this one yet, especially as the Map transform is said to process quicker than expressions, it would be good not to have to revert to the expression for this