generated: '2026-06-20'
method: derived
source: openapi/avalara-avatax-rest-openapi.yml
notes: >-
  Entity-relationship graph derived from the AvaTax REST v2 OpenAPI component
  schemas and their id-reference fields. Company is the aggregate root: Nexus,
  Location, Item and Customer all belong to a Company via `companyId`; a
  Transaction belongs to a Company and owns its lines and addresses. Relationships
  are read from the actual `*Id` / nested-array fields present in the schemas
  (no fabricated links).
entities:
  - name: Company
    schema: CompanyModel
    key: id
    business_key: companyCode
  - name: Nexus
    schema: NexusModel
    key: id
  - name: Location
    schema: LocationModel
    key: id
  - name: Item
    schema: ItemModel
    key: id
  - name: Customer
    schema: CustomerModel
    key: id
    business_key: customerCode
  - name: Transaction
    schema: TransactionModel
    key: id
  - name: TransactionLine
    schema: TransactionLineModel
    key: id
  - name: TransactionAddress
    schema: TransactionAddressModel
relationships:
  - from: Nexus
    to: Company
    type: belongs_to
    via: companyId
  - from: Location
    to: Company
    type: belongs_to
    via: companyId
  - from: Item
    to: Company
    type: belongs_to
    via: companyId
  - from: Customer
    to: Company
    type: belongs_to
    via: companyId
  - from: Transaction
    to: Company
    type: belongs_to
    via: companyId
  - from: Company
    to: Nexus
    type: has_many
    via: companyId
  - from: Company
    to: Location
    type: has_many
    via: companyId
  - from: Company
    to: Item
    type: has_many
    via: companyId
  - from: Company
    to: Customer
    type: has_many
    via: companyId
  - from: Transaction
    to: TransactionLine
    type: has_many
    via: lines
  - from: Transaction
    to: TransactionAddress
    type: has_many
    via: addresses