{
  "code": null,
  "collection": "architecture",
  "href": "https://banes-lab.com/ontology#architecture-aggregate",
  "id": "aggregate",
  "kind": "pattern",
  "layer": {
    "href": "https://banes-lab.com/ontology/schema#layer-domain-modeling",
    "json": "https://banes-lab.com/json/records/layer/domain-modeling",
    "label": "Domain Modeling",
    "markdown": "https://banes-lab.com/records/layer/domain-modeling.md",
    "ref": "layer:domain-modeling"
  },
  "name": "Aggregate",
  "ref": "architecture:aggregate",
  "relations": [
    {
      "links": [
        {
          "href": "https://banes-lab.com/ontology#architecture-explicit-boundaries",
          "json": "https://banes-lab.com/json/records/architecture/explicit-boundaries",
          "label": "Explicit Boundaries",
          "markdown": "https://banes-lab.com/records/architecture/explicit-boundaries.md",
          "ref": "architecture:explicit-boundaries"
        }
      ],
      "relation": "requires"
    },
    {
      "links": [
        {
          "href": "https://banes-lab.com/ontology#architecture-invariant",
          "json": "https://banes-lab.com/json/records/architecture/invariant",
          "label": "Invariant",
          "markdown": "https://banes-lab.com/records/architecture/invariant.md",
          "ref": "architecture:invariant"
        },
        {
          "href": "https://banes-lab.com/ontology#architecture-encapsulation",
          "json": "https://banes-lab.com/json/records/architecture/encapsulation",
          "label": "Encapsulation",
          "markdown": "https://banes-lab.com/records/architecture/encapsulation.md",
          "ref": "architecture:encapsulation"
        }
      ],
      "relation": "reinforces"
    },
    {
      "links": [
        {
          "href": "https://banes-lab.com/ontology/lexicon#lexicon-transactional-consistency-boundary",
          "json": "https://banes-lab.com/json/records/lexicon/transactional-consistency-boundary",
          "label": "Transactional Consistency Boundary",
          "markdown": "https://banes-lab.com/records/lexicon/transactional-consistency-boundary.md",
          "ref": "lexicon:transactional-consistency-boundary"
        },
        {
          "href": "https://banes-lab.com/ontology/lexicon#lexicon-root-guarded-invariants",
          "json": "https://banes-lab.com/json/records/lexicon/root-guarded-invariants",
          "label": "Root-Guarded Invariants",
          "markdown": "https://banes-lab.com/records/lexicon/root-guarded-invariants.md",
          "ref": "lexicon:root-guarded-invariants"
        }
      ],
      "relation": "enables"
    },
    {
      "links": [
        {
          "href": "https://banes-lab.com/ontology#architecture-anemic-domain-model",
          "json": "https://banes-lab.com/json/records/architecture/anemic-domain-model",
          "label": "Anemic Domain Model",
          "markdown": "https://banes-lab.com/records/architecture/anemic-domain-model.md",
          "ref": "architecture:anemic-domain-model"
        }
      ],
      "relation": "conflicts-with"
    },
    {
      "links": [
        {
          "href": "https://banes-lab.com/ontology/lexicon#lexicon-aggregate-size",
          "json": "https://banes-lab.com/json/records/lexicon/aggregate-size",
          "label": "Aggregate Size",
          "markdown": "https://banes-lab.com/records/lexicon/aggregate-size.md",
          "ref": "lexicon:aggregate-size"
        },
        {
          "href": "https://banes-lab.com/ontology#architecture-domain-service",
          "json": "https://banes-lab.com/json/records/architecture/domain-service",
          "label": "Domain Service",
          "markdown": "https://banes-lab.com/records/architecture/domain-service.md",
          "ref": "architecture:domain-service"
        },
        {
          "href": "https://banes-lab.com/ontology/schema#tension-aggregate-domain-service",
          "json": "https://banes-lab.com/json/records/tension/aggregate-domain-service",
          "label": "Domain Service / Aggregate",
          "markdown": "https://banes-lab.com/records/tension/aggregate-domain-service.md",
          "ref": "tension:aggregate-domain-service"
        }
      ],
      "relation": "tensions-with"
    },
    {
      "links": [
        {
          "href": "https://banes-lab.com/ontology/schema#tension-aggregate-aggregate-size",
          "json": "https://banes-lab.com/json/records/tension/aggregate-aggregate-size",
          "label": "Aggregate / Aggregate Size",
          "markdown": "https://banes-lab.com/records/tension/aggregate-aggregate-size.md",
          "ref": "tension:aggregate-aggregate-size"
        }
      ],
      "relation": "tensions"
    },
    {
      "links": [
        {
          "href": "https://banes-lab.com/ontology#architecture-anemic-domain-model",
          "json": "https://banes-lab.com/json/records/architecture/anemic-domain-model",
          "label": "Anemic Domain Model",
          "markdown": "https://banes-lab.com/records/architecture/anemic-domain-model.md",
          "ref": "architecture:anemic-domain-model"
        }
      ],
      "relation": "violated-by"
    },
    {
      "links": [
        {
          "href": "https://banes-lab.com/ontology/lexicon#lexicon-add-aggregate-invariant",
          "json": "https://banes-lab.com/json/records/lexicon/add-aggregate-invariant",
          "label": "Add Aggregate Invariant",
          "markdown": "https://banes-lab.com/records/lexicon/add-aggregate-invariant.md",
          "ref": "lexicon:add-aggregate-invariant"
        }
      ],
      "relation": "refactored-by"
    },
    {
      "links": [
        {
          "href": "https://banes-lab.com/ontology/schema#vocabulary-severity-contextual",
          "json": "https://banes-lab.com/json/records/vocabulary/severity-contextual",
          "label": "contextual",
          "markdown": "https://banes-lab.com/records/vocabulary/severity-contextual.md",
          "ref": "vocabulary:severity-contextual"
        }
      ],
      "relation": "severity"
    },
    {
      "links": [
        {
          "href": "https://banes-lab.com/ontology#architecture-category-domain-architecture",
          "json": "https://banes-lab.com/json/records/architecture-category/domain-architecture",
          "label": "Domain Architecture",
          "markdown": "https://banes-lab.com/records/architecture-category/domain-architecture.md",
          "ref": "architecture-category:domain-architecture"
        }
      ],
      "relation": "category"
    },
    {
      "links": [
        {
          "href": "https://banes-lab.com/ontology#architecture-domain-driven-design",
          "json": "https://banes-lab.com/json/records/architecture/domain-driven-design",
          "label": "Domain-Driven Design",
          "markdown": "https://banes-lab.com/records/architecture/domain-driven-design.md",
          "ref": "architecture:domain-driven-design"
        },
        {
          "href": "https://banes-lab.com/ontology#architecture-domain-model",
          "json": "https://banes-lab.com/json/records/architecture/domain-model",
          "label": "Domain Model",
          "markdown": "https://banes-lab.com/records/architecture/domain-model.md",
          "ref": "architecture:domain-model"
        }
      ],
      "relation": "refactors"
    },
    {
      "links": [
        {
          "href": "https://banes-lab.com/ontology#architecture-category-anti-patterns",
          "json": "https://banes-lab.com/json/ontology/principles/architecture-category-anti-patterns",
          "label": "Anti-patterns",
          "markdown": "https://banes-lab.com/ontology/principles/architecture-category-anti-patterns.md",
          "ref": "chapter:/ontology#architecture-category-anti-patterns"
        },
        {
          "href": "https://banes-lab.com/ontology#architecture-category-domain-architecture",
          "json": "https://banes-lab.com/json/ontology/principles/architecture-category-domain-architecture",
          "label": "Domain Architecture",
          "markdown": "https://banes-lab.com/ontology/principles/architecture-category-domain-architecture.md",
          "ref": "chapter:/ontology#architecture-category-domain-architecture"
        },
        {
          "href": "https://banes-lab.com/ontology#architecture-category-contracts-interfaces-compatibility",
          "json": "https://banes-lab.com/json/ontology/principles/architecture-category-contracts-interfaces-compatibility",
          "label": "Contracts / Interfaces / Compatibility",
          "markdown": "https://banes-lab.com/ontology/principles/architecture-category-contracts-interfaces-compatibility.md",
          "ref": "chapter:/ontology#architecture-category-contracts-interfaces-compatibility"
        },
        {
          "href": "https://banes-lab.com/ontology#architecture-category-core-modular-design",
          "json": "https://banes-lab.com/json/ontology/principles/architecture-category-core-modular-design",
          "label": "Core Modular Design",
          "markdown": "https://banes-lab.com/ontology/principles/architecture-category-core-modular-design.md",
          "ref": "chapter:/ontology#architecture-category-core-modular-design"
        },
        {
          "href": "https://banes-lab.com/ontology/lexicon#lexicon-category-domain-architecture",
          "json": "https://banes-lab.com/json/ontology/lexicon/lexicon-category-domain-architecture",
          "label": "Domain Architecture",
          "markdown": "https://banes-lab.com/ontology/lexicon/lexicon-category-domain-architecture.md",
          "ref": "chapter:/ontology/lexicon#lexicon-category-domain-architecture"
        },
        {
          "href": "https://banes-lab.com/ontology/schema#the-vocabulary-severity",
          "json": "https://banes-lab.com/json/ontology/schema/the-vocabulary-severity",
          "label": "Severity levels",
          "markdown": "https://banes-lab.com/ontology/schema/the-vocabulary-severity.md",
          "ref": "chapter:/ontology/schema#the-vocabulary-severity"
        },
        {
          "href": "https://banes-lab.com/ontology/schema#the-resolutions",
          "json": "https://banes-lab.com/json/ontology/schema/the-resolutions",
          "label": "The resolutions",
          "markdown": "https://banes-lab.com/ontology/schema/the-resolutions.md",
          "ref": "chapter:/ontology/schema#the-resolutions"
        }
      ],
      "relation": "linked-from"
    }
  ],
  "summary": "A design pattern that groups entities under one root, which is the only entry point and keeps the group's invariants.",
  "siblings": {
    "next": {
      "href": "https://banes-lab.com/ontology#architecture-value-object",
      "json": "https://banes-lab.com/json/records/architecture/value-object",
      "label": "Value Object",
      "markdown": "https://banes-lab.com/records/architecture/value-object.md",
      "ref": "architecture:value-object"
    },
    "previous": {
      "href": "https://banes-lab.com/ontology#architecture-explicit-boundaries",
      "json": "https://banes-lab.com/json/records/architecture/explicit-boundaries",
      "label": "Explicit Boundaries",
      "markdown": "https://banes-lab.com/records/architecture/explicit-boundaries.md",
      "ref": "architecture:explicit-boundaries"
    }
  },
  "up": {
    "href": null,
    "json": "https://banes-lab.com/json/api/records/architecture",
    "label": "Architecture principles",
    "markdown": "https://banes-lab.com/api/records/architecture.md",
    "ref": "api:records/architecture"
  },
  "aliases": [],
  "exemplar": {
    "after": "class FooOrder {\n  #items: FooItem[] = [];\n  #total = 0;\n  removeItem(id: FooItemId) {\n    this.#items = this.#items.filter(item => item.id !== id);\n    this.#total = this.#items.reduce((sum, item) => sum + item.price, 0);\n  }\n}",
    "before": "fooOrder.total -= item.price;\nfooOrderItems.delete(item.id);",
    "lang": "ts",
    "medium": "code"
  },
  "formedBy": null,
  "scope": [
    "domain",
    "consistency boundary",
    "bounded context"
  ],
  "severity": "contextual"
}