5. Mandatory Roles

5.1Introduction to CSDP Step 5

  • CSDP step 5 overview

  • Populations of roles, fact types, and object types

5.2Mandatory and Optional Roles

  • Optional and mandatory roles

  • Inclusive-or constraints

5.3Reference schemes

  • Simple reference schemes

  • Compound reference schemes

  • Disjunctive reference

5.4Case study

  • Compact disc retailer

5.5Logical derivation check

  • Logical derivation rules

  • Semiderived fact types

5.6Summary

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