---
sourceDocument: Australia ServiceNow AI Platform Administration
sourceDocumentLink: https://www.servicenow.com/docs/r/platform-administration

 Release :

    - australia

ft:locale :

    - en-US

ft:publication_title :

    - Australia ServiceNow AI Platform Administration

ft:clusterId :

    - platadm

bundleId :

    - platadm

workflow :

    - Platform


---

# System dictionary

# System dictionary {#ariaid-title1}

* Release version: Australia
* 
* Updated March 12, 2026
* 
* ![](https://www.servicenow.com/docs/portal-asset/ico-clock) 1 minute to read

View a list of all tables in columns in your instance from the system dictionary.

Each row in the system dictionary represents either a table or a column in one of the tables.
The system dictionary provides options for administrators to modify tables and fields, which in
turn define lists and forms.

Use caution when changing system dictionary records because changes can have a high impact on
functionality. In particular, changes to dictionary entries for system tables, which are tables
that begin with sys_, can create system-wide issues such as the inability to use update sets.

Dictionary changes are difficult to reverse. Also, dictionary changes automatically apply to
all extended tables unless a dictionary override is defined. Be sure that changes are well-tested
before applying them to a production instance.

## Creation options

When you create a field from the system dictionary, it is automatically added at the end of
the first section of the default form view.  
In most cases, use the following interfaces rather than creating entries directly on the system dictionary:

* To create tables and fields, use the Tables module.
* To create fields, configure the table form.
{#c_SystemDictionary__ul_nnv_r5r_lq}