UML class diagram

As explained in Functional Design and Architecture: Examples in Haskell

A UML diagram that represents classes, interfaces, implementations, and relationships in an object-oriented system.

A UML class diagram makes an object-oriented design discussable before coding, reducing accidental complexity while leaving room for judgment rather than prescribing a perfect solution. section 1.3

A subsystem diagram can show:

• An interface, such as ISubsystem. section 1.3
• An implementation, such as Engine, and a client class, such as ControlPanel. section 1.3
• Supporting domain elements, such as the Status enumeration, alongside relationships among classes. section 1.3

Engine control subsystem

A high-level model represents starting and stopping engines, bookkeeping subsystems, and related operations through an interface, its implementation, a consuming control panel, and status information. section 1.3

Figure 1.7 OOD class diagram for the engine control subsystem

Inspect the engine control subsystem’s UML organization as a visual complement to the element-by-element description. section 1.3

How Functional Design and Architecture: Examples in Haskell covers it

How deep it goes

Represents high-level domain organization, stopping short of detailed implementation mechanics.

Examples

Uses an engine control subsystem containing ISubsystem, Engine, ControlPanel, and Status.

What you can do after

Evaluate and communicate object-oriented structures before coding.

How it connects

Connects interfaces, implementations, client classes, enumerations, object-oriented design, use case diagrams, and functional programming.

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Also explained in

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Related concepts

• Unified Modeling Languagekind of · The Unified Modeling Language is a standardized visual modeling language for specifying, visualizing, constructing, and documenting software and other systems.
• specificationpart of · A specification is a formal or informal description of the required or intended behavior, properties, interfaces, or constraints of a system or component.
• UML state diagramcontrasts with · A UML state diagram is a visual model of the states of a system or entity and the transitions between them, including the events or conditions that trigger transitions.
• type signaturehas part · A type signature is a declaration or notation specifying the types and structure of a program element, especially a callable’s parameters and result.
• methodhas part · A method is a callable operation associated with an object or type and invoked through that association.

This explainer was generated by Manning's knowledge graph from the text of Functional Design and Architecture: Examples in Haskell. The section links point to the parts of the book it draws on.