Core Concepts

Bold for Delphi is built on several fundamental concepts that work together to provide a complete MDA framework.

Concept Map

flowchart TB
    subgraph Model["Domain Model"]
        UML[UML Classes]
        CodeGen[Code Generator]
        BusinessClasses[BusinessClasses.pas]
    end

    subgraph Runtime["Runtime"]
        ObjectSpace[Object Space]
        OCL[OCL Queries]
        Subscriptions[Subscription System]
        Logging[Logging System]
    end

    subgraph Data["Data Layer"]
        Persistence[Persistence Layer]
        DB[(Database)]
    end

    UML --> CodeGen
    CodeGen --> BusinessClasses
    BusinessClasses --> ObjectSpace
    ObjectSpace --> OCL
    ObjectSpace --> Subscriptions
    ObjectSpace --> Persistence
    Persistence --> DB

    click ObjectSpace href "object-space/" "Object Space documentation"
    click OCL href "ocl/" "OCL documentation"
    click Subscriptions href "subscriptions/" "Subscriptions documentation"
    click Logging href "logging/" "Logging documentation"
    click Persistence href "persistence/" "Persistence documentation"
    click DB href "persistence/" "Database persistence documentation"

Key Concepts

Concept	Description	Learn More
Object Space	In-memory graph of all domain objects	Object Space
OCL	Query language for navigating and filtering objects	OCL Queries
Persistence	Automatic object-relational mapping	Persistence
Subscriptions	Observer pattern for reactive updates	Subscriptions
Logging	Flexible logging with multiple output options	Logging

The Bold Workflow

1. Design - Create UML model with classes, attributes, and associations
2. Generate - Bold generates Delphi code from the model
3. Develop - Write business logic using generated classes
4. Run - Objects live in Object Space, persist to database
5. React - UI automatically updates via subscriptions