---
sourceDocument: Australia ServiceNow AI Platform Capabilities
sourceDocumentLink: https://servicenow-prod.fluidtopics.net/r/de-DE/servicenow-platform

 Release :

    - australia

ft:locale :

    - de-DE

ft:publication_title :

    - Australia ServiceNow AI Platform Capabilities

ft:clusterId :

    - platcap

bundleId :

    - platcap

workflow :

    - Platform


---

# Custom data lookup

# Custom data lookup {#ariaid-title1}

* Freigeben Version: Australia
* 
* Aktualisiert 12. März 2026
* 
* ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 Minute Lesedauer

You can create a custom table to store lookup data.
The custom table must extend the Data Lookup Matcher Rules \[dl_matcher\] table.

For example, you can create a Server Offering Lookups table. It stores information about
matcher offerings (bronze, silver, and gold) and associated setter values (memory and disk
space) for each matcher offering.

## Create a custom data lookup {#ariaid-title2}

Creating a catalog data lookup is similar to creating a normal, custom data lookup
except when creating the catalog data lookup definition record.
1. Create a custom data lookup table. It must extend the Data Lookup Matcher Rules `[dl_matcher]` table.
2. Add data lookup values to the data lookup table.
3. Create a catalog data lookup definition record.
4. (Optional) Create a data lookup module.
{#r_CreateCustomCatalogDataLookups__ol_ig2_35v_yq}

## Troubleshooting {#ariaid-title3}

If the custom data lookup definition rules are not behaving as expected, check for
certain conditions.
If the custom data lookup definition rules are not behaving as expected, check for the following conditions:

* Ensure that the matcher variable is not read-only. Since users cannot change read-only variables, there cannot be an on form change event for read-only variables.
* Ensure that the data in the matcher table is correct.
* If the lookup requires an exact match, verify that there is a matcher table row for each possible combination (including blank values). The lookup fails if it cannot find a matching value.
* If the variable is an option or check box, it always has a value, so you must select Always replace.
* Verify that you have not created a recursive rule, such as:If Variable A = 1, then
  Variable B =2. If Variable B = 2, then Variable A = 2.

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