Appendix on Advanced Beginner

Glossary

d8lzz1gpw@mozmail.com (kimbenji) — Tue, 13 Jan 2026 00:00:00 +0000

DDD Glossary#

A compilation of Domain-Driven Design core terminology. For detailed explanations, see the Concepts section.

TL;DR

Strategic Design: Define domain boundaries and language with Bounded Context, Context Mapping, Ubiquitous Language

Tactical Design: Implement domain models with Entity, Value Object, Aggregate, Repository, Domain Event

Architecture Patterns: Structure systems with Layered, Hexagonal, CQRS, Event Sourcing

Strategic Design#

For details: Strategic Design

Bounded Context#

Definition: An explicit boundary within which a specific domain model applies and maintains consistency

References

d8lzz1gpw@mozmail.com (kimbenji) — Tue, 13 Jan 2026 00:00:00 +0000

References#

Books, articles, and presentations for learning DDD.

TL;DR

Essential Reading: Blue Book (original), Red Book (implementation), DDD Distilled (intro)

Learning Order: Intro -> Fundamentals -> Advanced -> Practice (progressive learning)

Practice: Start with refactoring existing projects or EventStorming

Essential Reading#

Domain-Driven Design (Blue Book)#

Author: Eric Evans
Title: Domain-Driven Design: Tackling Complexity in the Heart of Software (2003)

The original text of DDD. Contains the principles and philosophy of strategic/tactical design patterns.

FAQ

d8lzz1gpw@mozmail.com (kimbenji) — Tue, 13 Jan 2026 00:00:00 +0000

DDD Frequently Asked Questions (FAQ)#

Common questions and answers when applying DDD.

TL;DR

DDD is a methodology, not an architecture, and provides value when there is complex business logic

Entity is identified by ID, Value Object equality is determined by attribute values

Design Aggregate as the minimum unit that protects true invariants

Ubiquitous Language is the most important element when applying DDD

Can be applied gradually to legacy systems through ACL (Anti-Corruption Layer)

Basic Concepts#

Q: Is DDD an architecture?#

A: No. DDD is a methodology for handling complex domains.

DDD Debate: Proponents vs Skeptics

d8lzz1gpw@mozmail.com (kimbenji) — Fri, 16 Jan 2026 00:00:00 +0000

DDD Debate: Proponents vs Skeptics#

Two senior developers debate Domain-Driven Design (DDD).

About This Document
This document records a debate between two senior developers with different perspectives on DDD. Rather than presenting a definitive answer, its purpose is to help you develop a balanced view of DDD through diverse perspectives.

Participants:

Proponent (Pro-DDD): A senior developer who advocates for DDD
Skeptic (Anti-DDD): A senior developer who is skeptical of DDD

Date: 2026-01-17