https://confluence.simplprogramme.eu/display/SIMPL/Annex+6+-+Architecture+building+blocks Standard relational databases. These are the most suitable option for storing primarily structured, transaction-oriented data, in case the structure does not change frequently and when the data integrity is important. The database options provided by the SMP can be open-source or commercially licensed. A relevant tool example include MySQL as the most prominent open source solution in the current market.