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  2. Class diagram - Wikipedia

    en.wikipedia.org/wiki/Class_diagram

    In software engineering, a class diagram [1] in the Unified Modeling Language (UML) is a type of static structure diagram that describes the structure of a system by showing the system's classes, their attributes, operations (or methods), and the relationships among objects. The class diagram is the main building block of object-oriented modeling.

  3. Entity–relationship model - Wikipedia

    en.wikipedia.org/wiki/Entity–relationship_model

    Diagrams created to represent attributes as well as entities and relationships may be called entity-attribute-relationship diagrams, rather than entity–relationship models. An ER model is typically implemented as a database. In a simple relational database implementation, each row of a table represents one instance of an entity type, and each ...

  4. has-a - Wikipedia

    en.wikipedia.org/wiki/Has-a

    UML class diagram Misuses of composition and aggregation. In object-oriented programming this relationship can be represented with a Unified Modeling Language Class diagram. This has-a relationship is also known as composition. As you can see from the Class Diagram on the right a car "has-a" carburetor, or a car is

  5. Unified Modeling Language - Wikipedia

    en.wikipedia.org/wiki/Unified_Modeling_Language

    A diagram is a partial graphic representation of a system's model. The set of diagrams need not completely cover the model and deleting a diagram does not change the model. The model may also contain documentation that drives the model elements and diagrams (such as written use cases). UML diagrams represent two different views of a system ...

  6. Object-oriented analysis and design - Wikipedia

    en.wikipedia.org/wiki/Object-oriented_analysis...

    Defining objects, creating class diagram from conceptual diagram: Usually map entity to class. Identifying attributes and their models. Use design patterns (if applicable): A design pattern is not a finished design, it is a description of a solution to a common problem, in a context. [7]

  7. Stereotype (UML) - Wikipedia

    en.wikipedia.org/wiki/Stereotype_(UML)

    In UML, become is a keyword for a specific UML stereotype, and applies to a dependency (modeled as a dashed arrow). Become shows that the source modeling element (the arrow's tail) is transformed into the target modeling element (the arrow's head), while keeping some sort of identity, even though it may have changed values, state, or even class.

  8. Cardinality (data modeling) - Wikipedia

    en.wikipedia.org/wiki/Cardinality_(data_modeling)

    In the object-oriented application programming paradigm, which is related to database structure design, UML class diagrams may be used for object modeling. In that case, object relationships are modeled using UML associations, and multiplicity is used on those associations to denote cardinality .

  9. C4 model - Wikipedia

    en.wikipedia.org/wiki/C4_model

    Code diagrams (level 4): provide additional details about the design of the architectural elements that can be mapped to code. The C4 model relies at this level on existing notations such as Unified Modelling Language (UML) , Entity Relation Diagrams (ERD) or diagrams generated by Integrated Development Environments (IDE) .