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Gramps Data Model
Gramps data model (v4.1)
Gramps uses the pickle module to serialise object hierarchies and store them in the database.
Details of the pickle module can be found here:
Below is a diagram of the Gramps data model (v4.1)
Primary objects are coloured blue. Secondary objects are coloured black. The dotted lines enclose object hierarchies that are stored in the database tables.