The System Dictionary in ServiceNow stores and maintains the metadata about tables and fields in the platform. It contains definitions for each table and column, including field data types, default values, and attributes.
Key Features of the System Dictionary (sys_dictionary Table):
Stores table and field definitions, including:
Column names
Data types (e.g., String, Integer, Reference)
Attributes (e.g., unique, read-only, required)
Default values
Ensures data integrity by defining the structure of database tables.
Used by administrators to modify or extend existing tables.
Allows the creation of custom fields in tables.
How to Access the System Dictionary:
Navigate to: System Definition → Dictionary
Search for a table or field to view its metadata.
Modify attributes (if needed) to customize table behavior.
Explanation of Incorrect Answers:
A . The human-readable labels and language settings - Incorrect.
Human-readable labels are stored in the sys_documentation table, not the System Dictionary.
C . The information on how tables relate to each other - Incorrect.
Table relationships are stored in the Schema Map, not the System Dictionary.
D . The language dictionary used for spell checking - Incorrect.
Spell checking and translations are managed in system localization settings, not the System Dictionary.
Reference from Certified System Administrator (CSA) Documentation:
ServiceNow Product Documentation → System Dictionary (sys_dictionary)
ServiceNow CSA Study Guide → Understanding Tables and Fields
ServiceNow Developer Documentation → Dictionary and Table Structure
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