A statistical business register may be quite a complex network of databases and functionalities. An approach that can be used to extend the functionality with minimum complication is to extract parts or the whole of one or more frozen frames from the SBR and afterwards link information from other data sources to its units. The resulting product, which is maintained outside and independent of the SBR, is called an SBR satellite. The responsibility for and control of a satellite are separated from the SBR and usually take place in a different environment.