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Below is a diagram of the Gramps data model (v4.1). As of October 2020, this model is reported to be valid for the v5.1 of Gramps. However, there is a minor `PlaceName` objects change in 4.2 to contain a string, language code and date range. The [[GEPS_045:_Place_Model_Enhancements|Places Model Enhancements]] planned for v5.2 3 are expected to have deeper changes. [[GEPS_045:_Place_Model_Enhancements#Documentation|One target for that Gramps Proposal]] includes this documentation.
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{{languages|Gramps Data Model}}{{man note|Gramps data model (v4v5.12)}}
Gramps uses the pickle module to serialise object hierarchies and store them in the database.
* https://docs.python.org/3/library/pickle.html
Primary objects are coloured blue. Secondary objects are coloured black. The dotted lines enclose object hierarchies that are stored in the database tables.
[[File:GrampsDataModelGrampsDataModel_03.svg|1024px]]
== See also ==
* [[Using database API|Programmer's Introduction to the Gramps database API]]
** [https://gramps-project.org/wiki/index.php/File:GrampsDataModel.svg 4.1 version of this Gramps Data Model] (2014)** [https://gramps-project.org/wiki/images/2/2e/API.svg UML (svg) diagram for Gramps 4.1.x API]<br />[[File:API.svg|3 revisions]] Created using the following [https://pylint.readthedocs.io/en/latest/pyreverse.html PyLint] command: <code>pyreverse -A -S $HOME/gramps/tree/master/gramps/gen/lib/*.py -o jpeg</code>
* [https://sourceforge.net/p/gramps/mailman/message/32882646/ Gramps data model] - discussion
* [[GEPS_013:_Gramps_Webapp#Model_overview|GEPS_013: Gramps Django Webapp:Model overview]]
* {{bug|10851}} : Gramps Data Model - Polish Version - Gramps 5.0.0
* More graphs available, see [https://gramps.discourse.group/t/core-classes-in-gramps-gen-lib/2241 posts on discourse].
* [[History_of_Gramps|History of Gramps]]
* [[Database_Formats|Database formats]]
[[Category:Developers/General]]
[[Category:Developers/Reference]]
[[Category:GEPS]]
