Are births and deaths modeled as events for a person in a genealogy profile or as attributes of the person. What are the pros and cons of each approach?
if you consider that every event has artifacts to go with it, they really should be events, so you can have all of the documents, etc. associated with them.
on the other hand, can you imagine a person record that doesn't have birth/death dates as attributes? you wouldn't want to have to do a join with the events that give you birth/death just so you could sort by those dates.
so there are the pros and cons, but there's also the idea you can have both. if you are willing to live with a database that isn't completely normalized, you can have them as events and for each person with birth/death events, copy those values into the attributes.
keep in mind, of course, that you could have multiple birth/death events for a person, records that might be in conflict, in which case only one of them that the user has indicated is meant to be the person's birth/date attribute would be copied.