A Schema Map in ServiceNow provides a visual representation of a table's relationships, including its extensions, references, and dependencies. This is useful for administrators and developers to understand how data is structured within an instance.
Navigate to System Definition > Tables
Select the desired table (e.g., incident, task, cmdb_ci, etc.)
Scroll to the "Related Links" section at the bottom of the form
Click "Show Schema Map"
How to Access the Schema Map for a Table:This will open a graphical representation of the table, showing:✅ Tables that extend from the selected table✅ Tables that reference the selected table✅ Fields that establish relationships
A. System Dictionary > Show Schema Map; Select Table
The Schema Map is not accessed via the System Dictionary.
C. System Definition > Show Schema Map; Select Table
There is no direct "Show Schema Map" menu under System Definition; you must go through Tables first.
D. System Definition > Dictionary: Select Table; Go to Related Links and click Show Schema Map
The Dictionary module does not provide a Schema Map option directly for tables.
Schema Maps Overview
Viewing Table Relationships with Schema Map
Why Other Options Are Incorrect?Official ServiceNow Documentation Reference:
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