It depends more on the nature of the data in the tables, and the
nature of the joining fields.

Enforce RI? Almost surely Yes. I don't know what the real-life logical
relationship between a record in Vitals and a record in Cemetary might
be, but I'd guess that you want to ensure that you don't make use of a
nonexistant Cemetary to bury a person (or, bury a person who never
existed). RI will prevent that.

Cascade Update? Depends on the nature of the joining field. This is
actually rather rarely useful: all it does is that if you *edit* -
change the value of - the "one" side table's linking field, that same
change will be made in all of the child table's records. If you are
linking from an Autonumber field you can't edit it anyhow so it makes
no sense to cascade updates that will never happen.

Cascade Deletes? Almost certainly not. Setting that will cause *every*
record in the Child table which matches a record in the Master table
to be automatically, irreversibly, and silently deleted whenever you
delete a main table record.

                 John W. Vinson[MVP]