Add, change or define person properties in a dexter project. Person properties defined here will
also be automatically imported with add_booklet
add_person_properties(db, person_properties = NULL, default_values = NULL)a connection to a dexter database, e.g. the output of start_new_project
or open_project
A data frame containing a column person_id and 1 or more other columns with person properties (e.g. education_type, birthdate)
a list where the names are person_properties and the values are defaults. The defaults will be used wherever the person property is unknown.
nothing
Due to limitations in the sqlite database backend that we use, the default values for a person property can only be defined once for each person_property