Domain Modeling Mapping tool

Domain Context Map

A domain context map shows where particular models apply and how their owning teams must collaborate.

A context map shows bounded contexts with their own domain language and model ownership, plus integration and team relationships. Upstream and downstream describe model dependency, not automatically the direction of a data packet.

Core question

Where do particular models apply and how must their owning teams collaborate?

Plan Method guide

Start comparison

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Participants: 3-10 participants
Time: 90–180 minutes for an initial slice; further modelling sessions as needed

Paper illustration for Domain Context Map

Contexts
Bound contexts
Identify areas with a consistent model using terms and rules.
Ownership
Ownership and current state
Assign each context to an owning team and collect current integrations.
Dependency
Label dependencies
Determine upstream/downstream model dependency or a symmetric relationship for each connected pair.
Patterns
Examine relationship patterns
Choose and justify team and integration patterns, such as Customer/Supplier, Partnership, Conformist or Anti-Corruption Layer.
Risks
Risks and next modelling
Review conflicting terms, unmaintained contracts and tight coupling with both sides.

Recheck relationships with both sides and version the map when models, teams or contracts change.

A good fit when

For domain-driven design when model boundaries or cross-team integrations need clarification.

Ideal for

DDD strategy
Architecture discovery
Platform boundaries

Not good for

Story-level refinement
UI flow design

Outputs

Context map with model relationships
The versioned context map contains boundaries, domain terms, owners, directed dependencies, relationship patterns, and open modelling questions.
Reviewed map and clarification tasks
The clarification record contains a specific modelling or contract question with owner and date.

Domain Context Map· worksheet

Fictional example

Context inventory

Record purpose, domain terms, boundaries and owner per context.

Fictional: Catalog (Offering team) manages courses; Enrollment (Participation team) manages seat reservations; Billing (Finance team) manages receivables.

Relationship 1

Record contexts, U/D roles, contract, patterns and change coordination.

Catalog U → Enrollment D: course ID and offering via a versioned API. Catalog offers OHS/Published Language; Enrollment translates external statuses through an ACL into its reservation model.

Relationship 2

Describe another relationship including influence over the interface.

Enrollment U → Billing D: confirmed enrolment event. Customer/Supplier: Billing can negotiate required billing fields with the Participation team.

Open modelling question

Which meaning or responsibility is unclear, who will clarify it and with what evidence?

On cancellation, reservation status differs from receivable status. Both teams review three cancellation cases by Friday and document event rules.

All example details are fictional and illustrate the application.

DDD Crew: Context Mapping

First step

Collect a domain slice, concrete business workflows, team ownership and known interfaces. Keep current and target views separate.

Open the method guide

Good to do first

Domain Modeling

EventStorming

Supplies domain events and terms as the basis for the context map.

Where to go next?

Domain Modeling

Bounded Context Canvas

Turns a clarification task into a fully worked-out bounded context.

Knowledge Modeling

Domain Storytelling

Deepens a clarified model area with narrated workflows.

Deep dive

Purpose

When a domain model and its associated contexts need to be thought through together, it creates a shared overview. It connects the business view and organizational boundary into a readable whole.

How it works

It places domain elements and context boundaries side by side and makes their connection explicit. This makes model, collaboration, and integration points discussable together without mixing up business boundary and technical interface.

In detail

This method carries weight because it orders business spaces from the domain's point of view, creating a more robust basis for later team or system cuts. Good application looks at coherence of meaning, language boundaries, and interactions instead of just relabeling existing org charts. This produces a picture that enables strategic delimitation while also exposing where shared terms only seem to carry the same meaning.

Facilitation

Bring cases where similar terms trigger different consequences in different areas, because that's where the dividing lines show most clearly. It gets really productive when a term stays stable but its purpose changes. Close with a short list of named contexts and the most uncertain transitions between them.

The method guide walks execution through 5 phases, timing, 5 pitfalls, and clear stop criteria.

Open method guide

Your perspective

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Sources and topics

Topics

Domain-Driven Design Context Boundaries

Sources

DDD Crew: Context Mappinggithub.comPrimary community working material on bounded contexts and relationship patterns; editorial example.

Artifact templates

Domain Context Map: WorksheetCollect a domain slice, concrete business workflows, team ownership and known interfaces. Keep current and target views separate.

markdown

domain-context-map-working-template.md

Collect a domain slice, concrete business workflows, team ownership and known interfaces. Keep current and target views separate.

Domain Context Map: Worksheet

Question

To be confirmed

Desired outcome

To be confirmed

Scope

Complete cycle Time: 90–180 minutes for an initial slice; further modelling sessions as needed

Complete this worksheet on paper or in your own document during the work.

Preparation for this scope

Method setup

Materials: Context cards, integration contracts, team list, arrows with a U/D legend and domain-term notes.
Roles: Domain experts, model owners, involved development teams and facilitator.
Advance information: Collect a domain slice, concrete business workflows, team ownership and known interfaces. Keep current and target views separate.
Overall time needed: 90–180 minutes for an initial slice; further modelling sessions as needed
Setup: Lay out context cards with terms and owners; add a U/D legend and derive connections from concrete integrations.