C6 (2 points)

https://knobit.org/id/task/dm-design-schemes/C6

dcterms:license	https://creativecommons.org/licenses/by/4.0/
owl:sameAs	https://bitbucket.org/reffa/ontology/id/task/dm-design-schemes/C6
rdfs:label	C6 (2 points) en
schema:hasPart	dm-design-schemes C6: account holding as fact types
schema:identifier	C6
schema:position	6
schema:text	Fact types in a fact-based scheme, 1 each: (a) 'Customer holds Account' is one elementary fact type whose uniqueness constraint spans both roles (many-to-many), with the account's role mandatory and the customer's optional; (b) the other facts are modelled as their own fact types with the right constraints: Account has IBAN with a uniqueness constraint on each role (one-to-one) and the account role mandatory, and Customer is signatory for Account as a separate many-to-many fact type with no mandatory role and no subset constraint on holding. en

Used by

has question	Seven retail banking designs in seven DMBOK2 modelling schemes (scheme design skills)
schema:isPartOf	dm-design-schemes C6: account holding as fact types