Abstract: A method of dynamic information retrieval from a plurality of data sources, each data source being a potential repository of necessary data, determining a stored access profile defined by a combination of specific data sources and/or data types on a particular data source, allocating a stored data access profile to a user, the user retrieving a data collection to form the necessary data in accordance with the stored access profile with the data collection taken from the specific data sources and/or data types, the user and/or a controller monitoring proportional usage of the necessary data to dynamically adapt the stored access profile in terms of the combination define by the specific data sources and/or data types on a particular data source for subsequent retrieval of the necessary data by the user, the adaption dependent upon dynamically maintaining at least a predefined quotient for the usage of the necessary data and/or parts of the necessary data.