JPA and Dynamic Relationships

I have the following table:

time_types

Id, Name

1,"Breakfast"

2,"Lunch"

3,"Dinner"

And then I have a table that represents the user values (the opening and closing times for each of time types defined above):

time_type_values

Id, time_type_id, open, close

1,1,"1970-01-01 10:00:00","1970-01-01 11:00:00"

2,2,"1970-01-01 22:00:00","1970-01-01 23:00:00"

3,3,"1970-01-01 13:00:00","1970-01-01 14:00:00"

How can the user create these particular properties when at least initially, the time_type_values have not yet been created?

[603 byte] By [aantix1a] at [2007-11-26 17:25:19]