Feature #993

Updated by Alexander Watzinger about 1 year ago

After refactoring the dates we decided to drop the table model.link_property because the only entries left there are would be type links.

These links are used to give types to links (e.g. has relationship, had participant). Because in these cases (they are system types) only one type can selected we will move this information into the table with a new field called "type_id" which will have a foreign key constraint to the model.entity id field.

There will be no noticeable changes change in the user interface but and the database data structure will get a bit simpler and easier to process.