DomainLangA DSL for Domain-Driven Design

Keep domains, bounded contexts, ownership, and terminology close to the codebase

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🎯

DDD-Aligned Language

Express domains, bounded contexts, context maps, and ubiquitous language in a clean, readable syntax.

🛠️

First-Class IDE Support

VS Code extension with syntax highlighting, validation, completion, hover, and go-to-definition.

📦

Version Control Friendly

Plain text files that live in your repo—easy to review in pull requests and track changes over time.

🔍

Built-in Validation

Catch common modeling issues early with real-time validation and helpful error messages.

🧩

Model Query SDK

Programmatic access to your DDD models for analysis, documentation generation, and automation.

📚

Multi-File Support

Split models across files with imports, namespaces, and dependencies for large codebases.

🚧 Prerelease Software

DomainLang is in active development and has not reached v1.0 yet. The language syntax and tooling may change. We welcome feedback and contributions—see the roadmap for planned features.

Quick Example

dlang

Classification CoreDomain
Team SalesTeam

Domain Sales {
    description: "Revenue generation and customer acquisition"
    vision: "Make it easy to buy"
}

bc Orders for Sales as CoreDomain by SalesTeam {
    description: "Order lifecycle and orchestration"

    terminology {
        term Order: "A customer's request to purchase"
    }
}

ContextMap SalesLandscape {
    contains Orders
}

Who is DomainLang for?

Architects and Tech Leads
Who want lightweight, reviewable DDD models that live in the codebase.

Teams Doing DDD
Who need a shared ubiquitous language documented alongside the code.

Developers
Who want IDE feedback while evolving architecture and domain models.