Name the four categories that form useful sources for relevant objects?
Tangible objects
Roles
Business transactions
Organisational units
What are example criteria for displaying multiplicities?
1 - exactly one 3..5 - between 3 and five inclusive 1..* - 1 or more 7, 12, 15 - only 7, 12 and 15 - no others * - the same as 0..* (nothing) - undefined