CRAM/ERAT Babel

College of Alamedapmcdermott@peralta.edu

Copyright © 2000 Patrick McDermott

CRAM: Class-Relationship-Attribute-MethodERAT: Entity-Relationship-Attribute-Trigger

Ha!

“The various OO methods use different (and often conflicting) terminology for these concepts. This is extremely frustrating but inevitable, given that OO languages are just as inconsiderate. It is in this area that the UML will bring some of its greatest benefits….”—Martin Fowler, UML Distilled, p. 53.

Context or “Camp”• CRC Cards: Class-Responsibility-Collaborator

• ERD: Entity-Relationship Diagrams– SAD: Traditional Systems Analysis & Design

• Relational: Relational Database Theory• Database: A Physical DB Table • Programmer: In the Code • UML: Unified Modeling Language

– OOAD: Object/Oriented Analysis & Design• Etc., etc., etc…: Any & All others

Category• CRC Cards: Class• ERD: Entity (Type) • Relational: Relation• Database: Table • Programmer: Layout, struct, class • UML: Class• Etc., etc., etc…: Type, File, Structure

Thing• CRC Cards: N/A• ERD: Entity• Relational: Tuple• Database: Row • Programmer: Record • UML: Object • Etc., etc., etc…: Occurrence, Instance

Connection• CRC Cards: Collaboration• ERD: Relationship • Relational: Foreign Key• Database: Database Key • Programmer: Pointer, Array, Containment• UML: Association, Aggregation,

Composition• Etc., etc., etc…: Has-a, Set, Pairing,

Hierarchy, Parent/Child, Owner/Members

Fact• CRC Cards: (Attribute)• ERD: Attribute • Relational: Attribute• Database: Column • Programmer: Variable • UML: Property • Etc., etc., etc…: Field, Item, Element

Behavior• CRC Cards: Responsibility• ERD: N/A (it’s in the DFD)

• Relational: N/A• Database: Service, Procedure• Programmer: Function()• UML: Method()• Etc., etc., etc…: Message, Operation,

Algorithm, Trigger, Routine, Subroutine, Process, Macro

Inheritance• CRC Cards: Superclass/Subclass• ERD: Supertype/Subtype• Relational: N/A• Database: 3 Variations• Programmer: Base/Derived• UML: Generalization/Specialization• Etc., etc., etc…: Is-a, Root/Branch/Leaf,

Parent/Child, Extension