An application program interface (API) for a data platform. The API includes a generic data access component that exposes at least one of stores, sessions, transactions, and query services of the data platform, which data platform is associated with a data store. A data classes component of the API provides canonical, application-independent classes that expose types and relationships of a data model of the data platform. The API includes a domain data classes component of application-specific and framework-specific classes that expose domain-specific properties and behaviors of the data platform. The data platform can be a common data platform that interfaces to the data store to provide data services accessible by a plurality of disparate application frameworks, which data services allow a corresponding application of the different frameworks to access the data store.