Entities, Value Objects, Aggregates — One Transactional Boundary Rule

This generated surface maps a learner-facing curriculum unit to its canonical source routes.

Curriculum surface

• Open learner-facing unit
• Curriculum path: content/curriculum/architecture/semester-07-architecture-ddd/module-03-domain-driven-design-bounded-contexts/concepts/cluster-04-tactical-building-blocks/10-entities-value-objects-aggregates-one-transactional-boundary-primary.md
• App: architecture
• Semester: semester-07-architecture-ddd
• Module: module-03-domain-driven-design-bounded-contexts
• Unit kind: concept
• Curation level: module_curated

Learning objectives

• Explain Entities, Value Objects, Aggregates — One Transactional Boundary Rule in terms of language, model boundaries, and coordination cost instead of purely diagrammatic DDD vocabulary.
• Use Entities, Value Objects, Aggregates — One Transactional Boundary Rule to decide where a model should split, who owns it, and how teams should collaborate across boundaries.
• Use learning-domain-driven-design to connect the learner explanation to bounded contexts, context maps, and strategic design tradeoffs.

Prerequisites

• Comfort with modular decomposition, boundaries, and why architecture must align with real problem domains.

Source books

• learning-domain-driven-design

Source routes

Learning Domain Driven Design

• /books/learning-domain-driven-design via Learning DDD: Integrating Aggregates and Outbox, Learning DDD: Modeling Business Logic to Implementation (entities/VOs/aggregates)

Supporting curriculum routes

No supporting curriculum routes linked yet.

External enrichment

• Context Mapper Documentation (official_docs_companion) - Connects DDD strategic design concepts to a concrete, inspectable modeling workflow.
• DDD Crew Context Mapping Patterns (read_if_stuck) - Helps learners keep context-map relationship vocabulary practical instead of abstract.

AI companion modes

• Explain simply
• Socratic tutor
• Challenge my understanding
• Diagnose my confusion
• Connect forward / backward

Source-of-truth note

This teaching unit is learner-facing guidance. Its canonical source backbone is the referenced book learning-domain-driven-design, and outside material should only clarify or strengthen that backbone.