e persistence framework o general-purpose, reusable, and extendable set of types that provides functionality to support persistent objects ● framework o a set of collaborating abstract and concrete classes that may be used as a template to solve a related family of problems. It is usually extended via subclassing for application-specific behaviorpersistence framework ⚫ general-purpose, reusable, and extendable set of types that provides functionality to support persistent objects framework ⚫ A set of collaborating abstract and concrete classes that may be used as a template to solve a related family of problems. It is usually extended via subclassing for application-specific behavior