Karteikarten
Chapter 3 Key Terms
Karten in diesem Stapel (17)
- 1Aggregation RelationshipA special-purpose UML notation represents the relationship between two classes often considered together, such as when a sports league comprises a collection of teams.
- 2AssociationUML symbol depicts the relationship between two classes, modeled as a solid line connecting two types in a model.
- 3AttributesData elements that describe instances in a class, like fields in a database table, characteristics, properties, or adjectives that define each type.
- 4Business RuleConcise statements of constraints on business processes; provide the logic that guides the behavior of the business in specific situations.
- 5CardinalitiesSee multiplicities.
Multiplicities- UML symbols that describe the minimum and the maximum number of times an instance of one class can be associated with cases of another class for a specific association between those two classes; they indicate whether the two classes are part of one-to-one, one-to-many, or many-to-many relationships. - 6ClassAny separately identifiable collection of things (objects) about which the organization wants to collect and store information. Classes can represent organization resources (e.g., trucks, machines, buildings, cash, investments), persons (e.g., customers, employees), events (e.g., sales, purchases, cash disbursements, cash receipts), and conceptual structures (e.g., accounts, product categories, budgets). Classes are typically implemented as tables in a relational database, where individual class instances are represented as rows in the table.
- 7Class DiagramsStructure models were prepared using UML notation.
- 8Composition RelationshipA special-purpose UML notation represents the relationship between two classes that are often considered together, similar to aggregation relationships. In composition relationships, one class cannot exist without the other, such as a book and the chapters that compose the text.
- 9ConstraintsOptional or mandatory guidance about how a process should perform in certain situations.
- 10Data ModelsA graphic representation of the conceptual contents of databases; data models support communication about database contents between users and designers of the database.
- 11EntitiesThe people, things, and events in the domain of interest; in UML notation, entities are modeled as classes.
- 12Foreign Key (FK)Attribute that allows database tables to be linked; foreign keys are the primary keys of other tables placed in the current table to support the link between the two tables.
- 13Generalization RelationshipA special-purpose UML symbol supports grouping things that share common characteristics; it reduces redundancy because the shared characteristics need only be modeled once.
- 14MultiplicitiesUML symbols that describe the minimum and the maximum number of times an instance of one class can be associated with cases of another class for a specific association between those two classes; they indicate whether the two classes are part of one-to-one, one-to-many, or many-to-many relationships.
- 15Primary Key (PK)An attribute or a combination of features uniquely identifies an instance of a class in a data model or a specific row in a table.
- 16RelationshipThe business purpose for the association between two classes or two database tables; see association.
- 17Structure ModelA conceptual depiction of a database, such as a UML class or entity-relationship model.
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- These are the key terms for Chapter 3
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- JACKSON BOEVE
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