Abstract: A computer-implemented method of preparing a presentation of a data set retrieved from a database, comprising the steps of: providing in a memory entities, of first metadata items, that respectively define which data to include in data sets retrievable from a data superset stored in the database. Further providing in the memory second metadata items which define properties of a presentation of the at least one data set by means of a graphical object specified by the properties. A graphical image of the data set is prepared by retrieving the data set defined by the first metadata items and by rendering of the data set in accordance with the second metadata items. The step of preparing a graphical image for multiple entities, of first metadata items, so as to provide a consecutive sequence of graphical images is repeated and the sequence is distributed for subsequent playback at a player station, disconnected from the database, so as to convey a collective presentation of the data sets in a progressive manner.