This paper specifies a preservation framework in which the semantics and parameters of digital preservation are discussed. Using this framework, the paper then proposes a methodology and a high-level breakdown of tasks for the development of digital repositories that aim to address digital preservation as part of their features and functionalities. The task breakdown enables analysis of feasibility of development of each task and the suitability of various development methodologies for each task. The preservation framework also facilitates decision making regarding automation and general-purpose nature of software that is developed for digital preservation of various digital content types and formats.