The xml file contains a library, which you can load into draw.io (now called diagrams.net) to make genograms.
- This page explains, how to load the library.
- This page explains, how you can create new / edit existing shapes. See also here.
I don't know how to edit shapes in the library xml because the shape information seems to be inbedded in one long string for every shape. If there is a way, please let me know. As a workaround, I save an xml file for every shape. Then, I can edit these files, load them, add them to the library, and save the updated library. Before I add shapes to the library, I adjust their size:
- 80 x 80 for people
- 35 x 35 for relationship symbols
- 100 x 30 for relationship brakets
For most shapes it is also helpful to check Constrain Proportions before adding them to the library.
I would be happy to accept pull requests.