Which service provides a system of record for datasets, including schema reference and metadata?

The service that functions as a system of record for datasets, which includes maintaining schema reference and metadata, is the Catalog. Catalog serves as an essential component within Adobe Experience Platform, allowing users to organize, access, and manage datasets effectively. It provides critical functionalities like data organization, schema management, and offers a comprehensive overview of metadata associated with various datasets.

Utilizing the Catalog enables users to understand the structure of their data and ensures consistency in data usage across different services and applications. By centralizing schema and metadata information, it simplifies data discovery and enhances governance, making it easier for teams to collaborate and leverage data effectively.

The other services mentioned serve different purposes. The Identity service focuses on customer identity management and does not handle datasets' metadata. The Data integration service is more concerned with the ingestion and movement of data rather than its organization and record-keeping. The Marketing service provides tools and functionalities designed for executing and optimizing marketing campaigns, which do not directly relate to maintaining dataset schemas or records. Therefore, the Catalog is uniquely positioned to fulfill the requirement of being a system of record for datasets.