In CDX data exchanges, what is the main benefit of using a JSON Schema to validate messages before processing?

• A. It ensures messages are always encrypted.
• B. It provides translation between data formats.
• C. It defines structure, types, and constraints to validate JSON payloads, ensuring compatibility.
• D. It automatically stores messages in a relational database.

Answer: (C)

JSON Schema defines the expected shape of a JSON message—the fields, data types, which properties are required, and any constraints on values or formats. Validating messages against this schema before processing enforces a contract between systems: every incoming message must conform to the agreed structure. When a message passes validation, downstream components can safely rely on the data being present and correctly typed, which prevents parsing errors, misinterpretations, and compatibility problems across partners. It also makes evolution safer, since you can version schemas and gradually migrate, while clearly identifying and rejecting nonconforming messages with helpful validation errors. This validation focuses on data quality and interoperability; encryption, translation, and storage are separate concerns.