Abstract: The present invention relates to a method for the storage and accessing of data in a data model, comprising steps for: providing a data processing environment; providing the data model; providing access to one or more of the computer systems that can be mutually linked, where the data model comprises: data with regard to entities, such as persons, for the storage thereof in a entity storage space; data with regard to sets of entities; data with regard to positions, such as roles or tasks, where a position is related to a group, being a set of entities and where the data with regard to a position comprise: at least one e-f-data space for an entity, and at least one g-f-data space for a group for the linking of the position to a group; data with regard to authority, like logical activities such as changing, creating or deleting, which are related to positions.