Business Analyst: What is a data dictionary?

Data dictionary — centralized repository of data definitions.

Contents:

• Field name.
• Data type.
• Length/format.
• Description.
• Allowed values.
• Business rules.

Example:

Benefits:

• Consistent data definitions.
• Single source of truth.
• Supports data quality.
• Facilitates integration.

BA role: Define and maintain data dictionary for project.