# Domain Architecture > Every principle in this category is listed as a record. Page: Ontology ยท Principles Canonical: https://banes-lab.com/ontology#arch-category-domain-architecture Every principle in this category is listed as a record. Each record carries its kind, its severity, the scopes it applies at and the layer it lives in, then the edge relations that join it to other records, the records that point back at it, the contracts that answer to it and the tensions it takes part in. The descriptors say how it is violated, detected, measured, repaired and enforced. Where the record carries one, an exemplar shows the shape before and after the principle is applied. Relations diagram The relations inside this category. ```mermaid flowchart LR n_domain_driven_design["Domain-Driven Design (DDD)"] n_domain_model["Domain Model"] n_bounded_context["Bounded Context"] n_context_mapping["Context Mapping"] n_anti_corruption_layer["Anti-Corruption Layer"] n_explicit_boundaries["Explicit Boundaries"] n_aggregate["Aggregate"] n_value_object["Value Object"] n_entity["Entity"] n_domain_service["Domain Service"] n_domain_driven_design --> n_bounded_context n_domain_driven_design --> n_domain_model n_bounded_context --> n_explicit_boundaries n_bounded_context --> n_context_mapping n_context_mapping --> n_bounded_context n_context_mapping --> n_explicit_boundaries n_context_mapping --> n_anti_corruption_layer n_aggregate --> n_explicit_boundaries n_entity --> n_domain_model n_entity -.-> n_value_object n_domain_service --> n_domain_model n_domain_service -.-> n_aggregate ``` ### Domain-Driven Design (DDD) - Kind: [style](https://banes-lab.com/records/kind/style.md) - Severity: contextual - Scope: domain, bounded context, system - Aliases: DDD - Layer: [Domain Modeling](https://banes-lab.com/records/layer/domain-modeling.md) Details Requires [Ubiquitous Language](https://banes-lab.com/records/arch/ubiquitous-language.md), [Bounded Context](https://banes-lab.com/records/arch/bounded-context.md) Reinforces [Domain Model](https://banes-lab.com/records/arch/domain-model.md), [Semantic Consistency](https://banes-lab.com/records/arch/semantic-consistency.md) Enables [Domain Alignment](https://banes-lab.com/records/lex/domain-alignment.md) In tension with [Simple CRUD](https://banes-lab.com/records/lex/simple-crud.md) Conflicts with [Anemic Transaction Script](https://banes-lab.com/records/lex/anemic-transaction-script.md) Referenced by [Domain Events](https://banes-lab.com/records/arch/domain-events.md), [Ubiquitous Language](https://banes-lab.com/records/arch/ubiquitous-language.md) Tensions [Domain-Driven Design (DDD) Simple CRUD](https://banes-lab.com/records/tension/domain-driven-design-ddd-simple-crud.md) Violated by domain logic in infrastructure/controllers Detected by anemic models, scattered business rules Measured by domain logic locality Refactored by Extract Domain Model, Add Aggregate, Split Context Enforced by layer rules, domain tests Before ```typescript function updateFoo(row: FooRow, name: string) { row.name = name; row.updated_at = Date.now(); return fooTable.save(row); } ``` After ```typescript class Foo { private constructor(readonly id: FooId, private name: string) {} rename(name: FooName) { this.name = name.value; } } foo.rename(FooName.create(name)); ``` ### Domain Model - Kind: [artifact](https://banes-lab.com/records/kind/artifact.md) - Severity: contextual - Scope: domain, bounded context - Layer: [Domain Modeling](https://banes-lab.com/records/layer/domain-modeling.md) Details Requires [Ubiquitous Language](https://banes-lab.com/records/arch/ubiquitous-language.md), [Invariants](https://banes-lab.com/records/arch/invariants.md) Reinforces [Correctness](https://banes-lab.com/records/arch/correctness.md), [Semantic Contracts](https://banes-lab.com/records/arch/semantic-contracts.md) Enables [Business Rule Encapsulation](https://banes-lab.com/records/lex/business-rule-encapsulation.md) In tension with [Persistence Simplicity](https://banes-lab.com/records/lex/persistence-simplicity.md) Conflicts with [Anemic Model](https://banes-lab.com/records/lex/anemic-model.md) Referenced by [Semantic Contracts](https://banes-lab.com/records/arch/semantic-contracts.md), [Domain-Driven Design (DDD)](https://banes-lab.com/records/arch/domain-driven-design.md), [Entity](https://banes-lab.com/records/arch/entity.md), [Domain Service](https://banes-lab.com/records/arch/domain-service.md), [Domain Events](https://banes-lab.com/records/arch/domain-events.md) Tensions [Domain Model Persistence Simplicity](https://banes-lab.com/records/tension/domain-model-persistence-simplicity.md) Violated by business rules outside domain objects/services Detected by procedural domain logic in services/controllers Measured by rule locality, invariant coverage Refactored by Move Logic to Domain, Add Value Object, Add Aggregate Enforced by domain layer rules, [tests](https://banes-lab.com/records/lex/tests.md) Before ```typescript type Foo = { status: string; count: number }; function closeFoo(foo: Foo) { foo.status = "closed"; } ``` After ```typescript class Foo { #status: "open" | "closed" = "open"; close() { if (this.#status === "closed") throw new Error("Foo already closed"); this.#status = "closed"; } } ``` ### Bounded Context - Kind: [constraint](https://banes-lab.com/records/kind/constraint.md) - Severity: recommended - Scope: domain, service, team - Aliases: Bounded Contexts - Layer: [Domain Modeling](https://banes-lab.com/records/layer/domain-modeling.md) Details Requires [Explicit Boundaries](https://banes-lab.com/records/arch/explicit-boundaries.md), [Ubiquitous Language](https://banes-lab.com/records/arch/ubiquitous-language.md) Reinforces [Modularity](https://banes-lab.com/records/arch/modularity.md), [Autonomy](https://banes-lab.com/records/arch/autonomy.md) Enables [Context Mapping](https://banes-lab.com/records/arch/context-mapping.md), [Microservices](https://banes-lab.com/records/arch/microservices.md) In tension with [Cross-Context Reuse](https://banes-lab.com/records/lex/cross-context-reuse.md) Conflicts with [Shared Global Model](https://banes-lab.com/records/lex/shared-global-model.md) Referenced by [Package by Feature](https://banes-lab.com/records/arch/package-by-feature.md), [Microservices](https://banes-lab.com/records/arch/microservices.md), [Domain-Driven Design (DDD)](https://banes-lab.com/records/arch/domain-driven-design.md), [Context Mapping](https://banes-lab.com/records/arch/context-mapping.md) Tensions [Bounded Context Cross-Context Reuse](https://banes-lab.com/records/tension/bounded-context-cross-context-reuse.md) Violated by cross-context model leakage Detected by shared domain entities across contexts Measured by context coupling Refactored by Split Model, Add Anti-Corruption Layer, Define Context Map Enforced by package/service boundaries Before ```typescript type FooStatus = "A" | "D"; function priceBar(status: FooStatus) { return status === "A" ? 10 : 0; } ``` After ```typescript type FooStatus = "active" | "disabled"; type BarEligibility = "eligible" | "ineligible"; function toBarEligibility(status: FooStatus): BarEligibility { return status === "active" ? "eligible" : "ineligible"; } ``` ### Context Mapping - Kind: [activity](https://banes-lab.com/records/kind/activity.md) - Severity: recommended - Scope: bounded contexts, integration - Layer: [Domain Modeling](https://banes-lab.com/records/layer/domain-modeling.md) Details Requires [Bounded Context](https://banes-lab.com/records/arch/bounded-context.md), [Relationship Semantics](https://banes-lab.com/records/lex/relationship-semantics.md) Reinforces [Explicit Boundaries](https://banes-lab.com/records/arch/explicit-boundaries.md), [Integration Clarity](https://banes-lab.com/records/lex/integration-clarity.md) Enables [Anti-Corruption Layer](https://banes-lab.com/records/arch/anti-corruption-layer.md) In tension with [Documentation Overhead](https://banes-lab.com/records/lex/documentation-overhead.md) Conflicts with [Implicit Integration](https://banes-lab.com/records/lex/implicit-integration.md) Referenced by [Bounded Context](https://banes-lab.com/records/arch/bounded-context.md) Tensions [Context Mapping Documentation Overhead](https://banes-lab.com/records/tension/context-mapping-documentation-overhead.md) Violated by undocumented service/domain relationships Detected by unclear ownership, ambiguous integration flows Measured by undocumented dependency count Refactored by Define Context Map, Classify Upstream/Downstream Enforced by architecture docs, dependency reviews Before ```typescript fooService.writeDirectly(barDatabase, foo); barService.readDirectly(fooDatabase, foo.id); ``` After ```typescript const contextMap = { upstream: "FooContext", downstream: "BarContext", relationship: "published-language", } as const; fooEvents.publish(toBarIntegrationEvent(foo)); ``` ### Anti-Corruption Layer - Kind: [pattern](https://banes-lab.com/records/kind/pattern.md) - Severity: recommended - Scope: integration, bounded context boundary - Layer: [Domain Modeling](https://banes-lab.com/records/layer/domain-modeling.md) Details Requires [Explicit Boundary](https://banes-lab.com/records/lex/explicit-boundary.md), [Translation Model](https://banes-lab.com/records/lex/translation-model.md) Reinforces [Domain Purity](https://banes-lab.com/records/lex/domain-purity.md), [Low Coupling](https://banes-lab.com/records/arch/low-coupling.md) Enables [Legacy/System Integration](https://banes-lab.com/records/lex/legacy-system-integration.md) In tension with [Mapping Overhead](https://banes-lab.com/records/lex/mapping-overhead.md) Conflicts with [Shared Model Coupling](https://banes-lab.com/records/lex/shared-model-coupling.md), [Vendor Lock-In Leakage](https://banes-lab.com/records/arch/vendor-lock-in-leakage.md) Referenced by [Context Mapping](https://banes-lab.com/records/arch/context-mapping.md), [Adapter Pattern](https://banes-lab.com/records/arch/adapter-pattern.md) Contracts [Anti-Corruption Layer Over Cross-Context Leak](https://banes-lab.com/records/algo/no-leaky-context.md) Tensions [Anti-Corruption Layer Mapping Overhead](https://banes-lab.com/records/tension/anti-corruption-layer-mapping-overhead.md) Violated by external model leaking into domain Detected by external DTOs used in domain layer Measured by leakage count, adapter coverage Refactored by Add Translator, Add Adapter, Introduce Boundary DTO Enforced by import rules, layer tests Before ```typescript function createBar(fooResponse: FooApiResponse) { return barService.create({ foo_status: fooResponse.state_code }); } ``` After ```typescript type BarInput = { eligible: boolean }; function fromFoo(response: FooApiResponse): BarInput { return { eligible: response.state_code === "A" }; } barService.create(fromFoo(fooResponse)); ``` ### Explicit Boundaries - Kind: [principle](https://banes-lab.com/records/kind/principle.md) - Severity: mandatory - Scope: module, component, service, domain - Layer: [Domain Modeling](https://banes-lab.com/records/layer/domain-modeling.md) Details Requires [Stable Interfaces](https://banes-lab.com/records/arch/stable-interfaces.md), [Ownership](https://banes-lab.com/records/lex/ownership.md) Reinforces [Modularity](https://banes-lab.com/records/arch/modularity.md), [Encapsulation](https://banes-lab.com/records/arch/encapsulation.md) Enables [Replaceability](https://banes-lab.com/records/arch/replaceability.md), [Governance](https://banes-lab.com/records/arch/governance.md) In tension with [Cross-Cutting Concerns](https://banes-lab.com/records/lex/cross-cutting-concerns.md) Conflicts with [Boundary Leakage](https://banes-lab.com/records/arch/boundary-leakage.md) Referenced by [Single Responsibility Principle (SRP)](https://banes-lab.com/records/arch/single-responsibility.md), [Separation of Concerns](https://banes-lab.com/records/arch/separation-of-concerns.md), [High Cohesion](https://banes-lab.com/records/arch/high-cohesion.md), [Modularity](https://banes-lab.com/records/arch/modularity.md), [Independence](https://banes-lab.com/records/arch/independence.md), [Bounded Context](https://banes-lab.com/records/arch/bounded-context.md), [Context Mapping](https://banes-lab.com/records/arch/context-mapping.md), [Aggregate](https://banes-lab.com/records/arch/aggregate.md), [Declared Jurisdiction](https://banes-lab.com/records/arch/declared-jurisdiction.md) Tensions [Explicit Boundaries Cross-Cutting Concerns](https://banes-lab.com/records/tension/cross-cutting-concerns-explicit-boundaries.md) Violated by internal imports, shared mutable internals Detected by forbidden imports, [cyclic dependencies](https://banes-lab.com/records/lex/cyclic-dependencies.md) Measured by boundary violation count Refactored by Move Code, Extract API, Restrict Exports Enforced by module rules, architecture tests Before ```typescript import { fooDatabase } from "../../foo/infrastructure/database"; export function loadBar(id: string) { return fooDatabase.query(id); } ``` After ```typescript export interface FooGateway { find(id: FooId): Promise; } export function loadBar(id: FooId, foos: FooGateway) { return foos.find(id); } ``` ### Aggregate - Kind: [pattern](https://banes-lab.com/records/kind/pattern.md) - Severity: contextual - Scope: domain, consistency boundary, bounded context - Layer: [Domain Modeling](https://banes-lab.com/records/layer/domain-modeling.md) Details Requires [Explicit Boundaries](https://banes-lab.com/records/arch/explicit-boundaries.md) Reinforces [Invariants](https://banes-lab.com/records/arch/invariants.md), [Encapsulation](https://banes-lab.com/records/arch/encapsulation.md) Enables [Transactional Consistency Boundary](https://banes-lab.com/records/lex/transactional-consistency-boundary.md), [Root-Guarded Invariants](https://banes-lab.com/records/lex/root-guarded-invariants.md) In tension with [Aggregate Size](https://banes-lab.com/records/lex/aggregate-size.md) Conflicts with [Anemic Domain Model](https://banes-lab.com/records/arch/anemic-domain-model.md) Referenced by [Domain Service](https://banes-lab.com/records/arch/domain-service.md) Tensions [Aggregate Aggregate Size](https://banes-lab.com/records/tension/aggregate-aggregate-size.md) Violated by invariants enforced by services outside the entity cluster Detected by cross-entity invariant checks scattered in services Measured by out-of-aggregate invariant enforcement count Refactored by Define Aggregate Root, Enforce Invariants Within Enforced by domain model review Before ```typescript fooOrder.total -= item.price; fooOrderItems.delete(item.id); ``` After ```typescript class FooOrder { #items: FooItem[] = []; #total = 0; removeItem(id: FooItemId) { this.#items = this.#items.filter(item => item.id !== id); this.#total = this.#items.reduce((sum, item) => sum + item.price, 0); } } ``` ### Value Object - Kind: [pattern](https://banes-lab.com/records/kind/pattern.md) - Severity: recommended - Scope: domain, modeling, immutability - Layer: [Domain Modeling](https://banes-lab.com/records/layer/domain-modeling.md) Details Requires [Value Equality](https://banes-lab.com/records/lex/value-equality.md) Reinforces [Immutability](https://banes-lab.com/records/arch/immutability.md), [Encapsulation](https://banes-lab.com/records/arch/encapsulation.md) Enables [Self-Validating Values](https://banes-lab.com/records/lex/self-validating-values.md), [Side-Effect-Free Equality](https://banes-lab.com/records/lex/side-effect-free-equality.md) In tension with [Object Count](https://banes-lab.com/records/lex/object-count.md) Conflicts with [Primitive Obsession](https://banes-lab.com/records/arch/primitive-obsession.md), [Data Clumps](https://banes-lab.com/records/arch/data-clumps.md), [Long Parameter List](https://banes-lab.com/records/arch/long-parameter-list.md) Referenced by [Entity](https://banes-lab.com/records/arch/entity.md) Tensions [Value Object Object Count](https://banes-lab.com/records/tension/object-count-value-object.md) Violated by domain concepts carried as bare primitives Detected by repeated validation of the same primitive shape Measured by primitive-typed domain concept count Refactored by Introduce Value Object Enforced by domain model review Before ```typescript function priceFoo(amount: number, currency: string) { return { amount, currency }; } ``` After ```typescript class Money { private constructor(readonly amount: number, readonly currency: string) {} static of(amount: number, currency: string): Money { if (amount < 0) throw new Error("negative money"); return new Money(amount, currency); } equals(other: Money) { return this.amount === other.amount && this.currency === other.currency; } add(other: Money): Money { return Money.of(this.amount + other.amount, this.currency); } } ``` ### Entity - Kind: [pattern](https://banes-lab.com/records/kind/pattern.md) - Severity: contextual - Scope: domain, identity, lifecycle - Layer: [Domain Modeling](https://banes-lab.com/records/layer/domain-modeling.md) Details Requires [Stable Identity](https://banes-lab.com/records/lex/stable-identity.md) Reinforces [Domain Model](https://banes-lab.com/records/arch/domain-model.md), [Encapsulation](https://banes-lab.com/records/arch/encapsulation.md) Enables [Identity-Based Equality](https://banes-lab.com/records/lex/identity-based-equality.md), [Lifecycle Tracking](https://banes-lab.com/records/lex/lifecycle-tracking.md) In tension with [Value Object](https://banes-lab.com/records/arch/value-object.md) Conflicts with [Anemic Domain Model](https://banes-lab.com/records/arch/anemic-domain-model.md) Tensions [Entity Value Object](https://banes-lab.com/records/tension/entity-value-object.md) Violated by identity equated by attribute comparison Detected by equality by field value where identity is meant Measured by attribute-equality misuse count Refactored by Model Identity Explicitly Enforced by domain model review Before ```typescript type Foo = { id: string; name: string; status: string }; foo.status = "active"; ``` After ```typescript class Foo { constructor(readonly id: FooId, private name: string, private status: FooStatus) {} equals(other: Foo) { return this.id === other.id; } activate() { this.status = "active"; } } ``` ### Domain Service - Kind: [pattern](https://banes-lab.com/records/kind/pattern.md) - Severity: contextual - Scope: domain, behavior, coordination - Layer: [Domain Modeling](https://banes-lab.com/records/layer/domain-modeling.md) Details Requires [Domain Model](https://banes-lab.com/records/arch/domain-model.md) Reinforces [Single Responsibility Principle (SRP)](https://banes-lab.com/records/arch/single-responsibility.md), [Ubiquitous Language](https://banes-lab.com/records/arch/ubiquitous-language.md) Enables [Cross-Entity Domain Logic](https://banes-lab.com/records/lex/cross-entity-domain-logic.md) In tension with [Aggregate](https://banes-lab.com/records/arch/aggregate.md) Conflicts with [Fat Controller](https://banes-lab.com/records/arch/fat-controller.md), [Transaction Script Sprawl](https://banes-lab.com/records/arch/transaction-script-sprawl.md) Tensions [Domain Service Aggregate](https://banes-lab.com/records/tension/aggregate-domain-service.md) Violated by multi-entity domain rules living in controllers Detected by domain logic in application/transport layers Measured by misplaced domain-rule count Refactored by Extract Domain Service Enforced by domain model review Before ```typescript class FooAccount { transferTo(other: FooAccount, amount: number) { this.balance -= amount; other.balance += amount; } } ``` After ```typescript class FooTransferService { transfer(from: FooAccount, to: FooAccount, amount: Money) { from.withdraw(amount); to.deposit(amount); } } ``` ## Links to - [style](https://banes-lab.com/records/kind/style.md) - [Domain Modeling](https://banes-lab.com/records/layer/domain-modeling.md) - [Ubiquitous Language](https://banes-lab.com/records/arch/ubiquitous-language.md) - [Bounded Context](https://banes-lab.com/records/arch/bounded-context.md) - [Domain Model](https://banes-lab.com/records/arch/domain-model.md) - [Semantic Consistency](https://banes-lab.com/records/arch/semantic-consistency.md) - [Domain Alignment](https://banes-lab.com/records/lex/domain-alignment.md) - [Simple CRUD](https://banes-lab.com/records/lex/simple-crud.md) - [Anemic Transaction Script](https://banes-lab.com/records/lex/anemic-transaction-script.md) - [Domain Events](https://banes-lab.com/records/arch/domain-events.md) - [Domain-Driven Design (DDD) / Simple CRUD](https://banes-lab.com/records/tension/domain-driven-design-ddd-simple-crud.md) - [artifact](https://banes-lab.com/records/kind/artifact.md) - [Invariants](https://banes-lab.com/records/arch/invariants.md) - [Correctness](https://banes-lab.com/records/arch/correctness.md) - [Semantic Contracts](https://banes-lab.com/records/arch/semantic-contracts.md) - [Business Rule Encapsulation](https://banes-lab.com/records/lex/business-rule-encapsulation.md) - [Persistence Simplicity](https://banes-lab.com/records/lex/persistence-simplicity.md) - [Anemic Model](https://banes-lab.com/records/lex/anemic-model.md) - [Domain-Driven Design (DDD)](https://banes-lab.com/records/arch/domain-driven-design.md) - [Entity](https://banes-lab.com/records/arch/entity.md) - [Domain Service](https://banes-lab.com/records/arch/domain-service.md) - [Domain Model / Persistence Simplicity](https://banes-lab.com/records/tension/domain-model-persistence-simplicity.md) - [Tests](https://banes-lab.com/records/lex/tests.md) - [constraint](https://banes-lab.com/records/kind/constraint.md) - [Explicit Boundaries](https://banes-lab.com/records/arch/explicit-boundaries.md) - [Modularity](https://banes-lab.com/records/arch/modularity.md) - [Autonomy](https://banes-lab.com/records/arch/autonomy.md) - [Context Mapping](https://banes-lab.com/records/arch/context-mapping.md) - [Microservices](https://banes-lab.com/records/arch/microservices.md) - [Cross-Context Reuse](https://banes-lab.com/records/lex/cross-context-reuse.md) - [Shared Global Model](https://banes-lab.com/records/lex/shared-global-model.md) - [Package by Feature](https://banes-lab.com/records/arch/package-by-feature.md) - [Bounded Context / Cross-Context Reuse](https://banes-lab.com/records/tension/bounded-context-cross-context-reuse.md) - [activity](https://banes-lab.com/records/kind/activity.md) - [Relationship Semantics](https://banes-lab.com/records/lex/relationship-semantics.md) - [Integration Clarity](https://banes-lab.com/records/lex/integration-clarity.md) - [Anti-Corruption Layer](https://banes-lab.com/records/arch/anti-corruption-layer.md) - [Documentation Overhead](https://banes-lab.com/records/lex/documentation-overhead.md) - [Implicit Integration](https://banes-lab.com/records/lex/implicit-integration.md) - [Context Mapping / Documentation Overhead](https://banes-lab.com/records/tension/context-mapping-documentation-overhead.md) - [pattern](https://banes-lab.com/records/kind/pattern.md) - [Explicit Boundary](https://banes-lab.com/records/lex/explicit-boundary.md) - [Translation Model](https://banes-lab.com/records/lex/translation-model.md) - [Domain Purity](https://banes-lab.com/records/lex/domain-purity.md) - [Low Coupling](https://banes-lab.com/records/arch/low-coupling.md) - [Legacy/System Integration](https://banes-lab.com/records/lex/legacy-system-integration.md) - [Mapping Overhead](https://banes-lab.com/records/lex/mapping-overhead.md) - [Shared Model Coupling](https://banes-lab.com/records/lex/shared-model-coupling.md) - [Vendor Lock-In Leakage](https://banes-lab.com/records/arch/vendor-lock-in-leakage.md) - [Adapter Pattern](https://banes-lab.com/records/arch/adapter-pattern.md) - [Anti-Corruption Layer Over Cross-Context Leak](https://banes-lab.com/records/algo/no-leaky-context.md) - [Anti-Corruption Layer / Mapping Overhead](https://banes-lab.com/records/tension/anti-corruption-layer-mapping-overhead.md) - [principle](https://banes-lab.com/records/kind/principle.md) - [Stable Interfaces](https://banes-lab.com/records/arch/stable-interfaces.md) - [Ownership](https://banes-lab.com/records/lex/ownership.md) - [Encapsulation](https://banes-lab.com/records/arch/encapsulation.md) - [Replaceability](https://banes-lab.com/records/arch/replaceability.md) - [Governance](https://banes-lab.com/records/arch/governance.md) - [Cross-Cutting Concerns](https://banes-lab.com/records/lex/cross-cutting-concerns.md) - [Boundary Leakage](https://banes-lab.com/records/arch/boundary-leakage.md) - [Single Responsibility Principle (SRP)](https://banes-lab.com/records/arch/single-responsibility.md) - [Separation of Concerns](https://banes-lab.com/records/arch/separation-of-concerns.md) - [High Cohesion](https://banes-lab.com/records/arch/high-cohesion.md) - [Independence](https://banes-lab.com/records/arch/independence.md) - [Aggregate](https://banes-lab.com/records/arch/aggregate.md) - [Declared Jurisdiction](https://banes-lab.com/records/arch/declared-jurisdiction.md) - [Explicit Boundaries / Cross-Cutting Concerns](https://banes-lab.com/records/tension/cross-cutting-concerns-explicit-boundaries.md) - [Cyclic Dependencies](https://banes-lab.com/records/lex/cyclic-dependencies.md) - [Transactional Consistency Boundary](https://banes-lab.com/records/lex/transactional-consistency-boundary.md) - [Root-Guarded Invariants](https://banes-lab.com/records/lex/root-guarded-invariants.md) - [Aggregate Size](https://banes-lab.com/records/lex/aggregate-size.md) - [Anemic Domain Model](https://banes-lab.com/records/arch/anemic-domain-model.md) - [Aggregate / Aggregate Size](https://banes-lab.com/records/tension/aggregate-aggregate-size.md) - [Value Equality](https://banes-lab.com/records/lex/value-equality.md) - [Immutability](https://banes-lab.com/records/arch/immutability.md) - [Self-Validating Values](https://banes-lab.com/records/lex/self-validating-values.md) - [Side-Effect-Free Equality](https://banes-lab.com/records/lex/side-effect-free-equality.md) - [Object Count](https://banes-lab.com/records/lex/object-count.md) - [Primitive Obsession](https://banes-lab.com/records/arch/primitive-obsession.md) - [Data Clumps](https://banes-lab.com/records/arch/data-clumps.md) - [Long Parameter List](https://banes-lab.com/records/arch/long-parameter-list.md) - [Value Object / Object Count](https://banes-lab.com/records/tension/object-count-value-object.md) - [Stable Identity](https://banes-lab.com/records/lex/stable-identity.md) - [Identity-Based Equality](https://banes-lab.com/records/lex/identity-based-equality.md) - [Lifecycle Tracking](https://banes-lab.com/records/lex/lifecycle-tracking.md) - [Value Object](https://banes-lab.com/records/arch/value-object.md) - [Entity / Value Object](https://banes-lab.com/records/tension/entity-value-object.md) - [Cross-Entity Domain Logic](https://banes-lab.com/records/lex/cross-entity-domain-logic.md) - [Fat Controller](https://banes-lab.com/records/arch/fat-controller.md) - [Transaction Script Sprawl](https://banes-lab.com/records/arch/transaction-script-sprawl.md) - [Domain Service / Aggregate](https://banes-lab.com/records/tension/aggregate-domain-service.md) ## Linked from - [The layer topology](https://banes-lab.com/ontology/schema/the-layer-topology.md) - [The membership](https://banes-lab.com/ontology/schema/the-membership.md)