-
Action:
- An operation, such as create, delete, update, or read,
- which may be performed on data objects. (4)
-
Action assertion:
- A statement of a constraint or control on
- the actions of the organization. (4)
-
Anchor object:
- A business rule (a fact) on which actions are
- limited. (4)
-
Attribute inheritance:
- A property by which subtype entities
- inherit values of all attributes and instances of all
- relationships of the supertype. (4)
-
Completeness constraint:
- A type of constraint that
- addresses the question whether an instance of a supertype
- must also be a member of at least one subtype. (4)
-
Corresponding object:Abusiness rule (a fact) that influences
- the ability to perform an action on another business
- rule. (4)
-
Derivation:
- A statement derived from other knowledge in
- the business. (4)
-
Derived fact:
- A fact that is derived from business rules
- using an algorithm or inference. (4)
-
Disjoint rule:
- A rule that specifies that an instance of a
- supertype may not simultaneously be a member of
- two (or more) subtypes. (4)
-
Disjointness constraint:
- A constraint that addresses the
- question whether an instance of a supertype may simultaneously
- be a member of two (or more) subtypes. (4)
-
Enhanced entity-relationship (EER) model:
- The model that
- has resulted from extending the original E-R model
- with new modeling constructs. (4)
-
Entity cluster:
- A set of one or more entity types and associated
- relationships grouped into a single abstract
- entity type. (4)
-
Generalization:
- The process of defining a more general entity
- type from a set of more specialized entity types. (4)
-
Overlap rule:
- A rule that specifies that an instance of a
- supertype may simultaneously be a member of two
- (or more) subtypes. (4)
-
Partial specialization rule:
- Specifies that an entity instance
- of the supertype is allowed not to belong to any
- subtype. (4)
-
Specialization:
- The process of defining one or more subtypes
- of the supertype and forming supertype/subtype
- relationships. (4)
-
Structural assertion:
- A statement that expresses some
- aspect of the static structure of the organization. (4)
-
Subtype:
- A subgrouping of the entities in an entity type that
- is meaningful to the organization and that shares
- common attributes or relationships
-
Subtype discriminator:
- An attribute of the supertype whose
- values determine the target subtype or subtypes. (4)
-
Supertype:
- A generic entity type that has a relationship
- with one or more subtypes. (4)
-
Supertype/subtype hierarchy:
- A hierarchical arrangement
- of supertypes and subtypes, where each subtype has
- only one supertype. (4)
-
Total specialization rule:
- Specifies that each entity instance
- of the supertype must be a member of some subtype
- in the relationship. (4)
-
Universal data model:
- A generic or template data model that
- can be reused as a starting point for a data modeling
- project. (4)
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