This paper describes the construction of a generic data model for strategic planning in Public Administration (PA). This model is presented at two distinct levels corresponding to different levels of the Zachman framework. The data model developed covers one of the major generic processes which public administration agencies perform, that of strategy formulation. This model can be used to provide common definitions (vocabulary) in strategic planning and establish a conceptual framework that can be easily adapted for strategic planning to specific PA organizations. This work is part of an overall research effort, which involves building an enterprise architecture for Public Administration following an approach that populates the Zachman Framework for the overall domain of Public Administration. The models developed are generic (process, data, etc.) in order to possess the descriptive power, which allows them to be readily specialized for particular Public Administration agencies.