Information Modeling and Relational Databases, 2nd Edition

5. Mandatory Roles

5.1	Introduction to CSDP Step 5 CSDP step 5 overview Populations of roles, fact types, and object types
5.2	Mandatory and Optional Roles Optional and mandatory roles Inclusive-or constraints
5.3	Reference schemes Simple reference schemes Compound reference schemes Disjunctive reference
5.4	Case study Compact disc retailer
5.5	Logical derivation check Logical derivation rules Semiderived fact types
5.6	Summary