Title: Unknown Field Mapping Variable
Last modified: November 15, 2022

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# Unknown Field Mapping Variable

 *  Resolved [actionanalysis](https://wordpress.org/support/users/actionanalysis/)
 * (@actionanalysis)
 * [3 years, 7 months ago](https://wordpress.org/support/topic/unknown-field-mapping-variable/)
 * Hey I have a ‘g:identifier_exists’ field in my product feed with a value of ‘
   Plugin Calculation’. I understand this is probably a custom value but cannot 
   find how to check what the calculation does or how to edit/inspect it. I would
   like some clarity on how to edit this value thanks.

Viewing 2 replies - 1 through 2 (of 2 total)

 *  [supportadtribes](https://wordpress.org/support/users/supportadtribes/)
 * (@supportadtribes)
 * [3 years, 7 months ago](https://wordpress.org/support/topic/unknown-field-mapping-variable/#post-16200291)
 * Hi,
 * The “plugin calculation” will have a look at the individual products in your 
   feed and see if those have a brand and/or GTIN/MPN in it. When products have 
   a brand and a MPN or GTIN than the identifier exists value in your feed will 
   be “yes”, otherwise it will be “no”.
 * Also, please see:
    [https://adtribes.io/i-need-help-with-my-gtins/](https://adtribes.io/i-need-help-with-my-gtins/)
 * Hope this helps?
 *  [supportadtribes](https://wordpress.org/support/users/supportadtribes/)
 * (@supportadtribes)
 * [3 years, 4 months ago](https://wordpress.org/support/topic/unknown-field-mapping-variable/#post-16409160)
 * Assuming the issue at hand has been resolved and our support is no longer required
   I will close this topic for housekeeping reasons now.
 * Do not hesitate to reach out to us again in-case you need our help again.

Viewing 2 replies - 1 through 2 (of 2 total)

The topic ‘Unknown Field Mapping Variable’ is closed to new replies.

 * ![](https://ps.w.org/woo-product-feed-pro/assets/icon-256x256.png?rev=3111496)
 * [Product Feed PRO for WooCommerce by AdTribes – Product Feeds for WooCommerce](https://wordpress.org/plugins/woo-product-feed-pro/)
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 * 2 replies
 * 2 participants
 * Last reply from: [supportadtribes](https://wordpress.org/support/users/supportadtribes/)
 * Last activity: [3 years, 4 months ago](https://wordpress.org/support/topic/unknown-field-mapping-variable/#post-16409160)
 * Status: resolved