== Data Model ==
There are changes to the data model:
# New date and language fields on place name
* A Family Tree '''cannot be opened''' in Gramps 3.4/4.0/4.1/4.2 and Gramps 5.0 without upgrade or downgrade.
* A Gramps XML file generated by Gramps 3.4/4.0/4.1/4.2 is '''not identical''' to one generated by Gramps 5.0.