What component of the ServiceNow infrastructure defines every table and field in the system?

Schema is a general database concept, but in ServiceNow, the specific component defining tables and fields with their attributes is known as the Dictionary.

A Field Map is typically used for transforming data between fields, not for defining the fields and tables themselves.

Table Class Manager is not a standard ServiceNow component responsible for defining every table and field in the system.

The Dictionary in ServiceNow defines the structure of the database, including every table and field (column), specifying their data types, lengths, default values, and relationships within the system.

Data Atlas is not a standard ServiceNow component for defining tables and fields; it might refer to data governance or mapping tools.