generated: '2026-07-20'
method: derived
source: >-
  Derived from the 4xx responses on the two public operations in
  openapi/ubank-cds-banking-products-openapi.yml and the DSB Consumer Data
  Standards error-code registry the CDR Banking API references. ubank's public
  PRD surface uses the shared CDS error format, not RFC 9457.
format: cds-response-error-list
envelope:
  media_type: application/json
  schema: ResponseErrorListV2
  shape: '{ "errors": [ { "code": "urn:au-cds:error:...", "title": "...", "detail": "...", "meta": { ... } } ] }'
  fields:
    code: The error code URN (or an application-specific string that extends a URN via meta).
    title: A short, stable human-readable summary that must not change per occurrence.
    detail: A human-readable explanation specific to this occurrence.
    meta: Optional; carries the extended URN and/or urn parameters for the error.
errors:
- status: 400
  code: urn:au-cds:error:v2:Field/Invalid
  title: Invalid Field
  detail: A supplied field value did not pass validation.
  source_operations: [listBankingProducts, getBankingProductDetail]
- status: 400
  code: urn:au-cds:error:v2:Field/Missing
  title: Missing Required Field
  detail: A required request field was not supplied.
  source_operations: [listBankingProducts, getBankingProductDetail]
- status: 400
  code: urn:au-cds:error:v2:Header/Missing
  title: Missing Required Header
  detail: A required request header (e.g. x-v) was not supplied.
  source_operations: [listBankingProducts, getBankingProductDetail]
- status: 400
  code: urn:au-cds:error:v2:Header/InvalidVersion
  title: Invalid Version
  detail: The x-v (or x-min-v) header value was not a valid positive integer.
  source_operations: [listBankingProducts, getBankingProductDetail]
- status: 400
  code: urn:au-cds:error:v2:Field/InvalidDateTime
  title: Invalid Date
  detail: A supplied date/time value (e.g. updated-since) was not a valid DateTimeString.
  source_operations: [listBankingProducts]
- status: 400
  code: urn:au-cds:error:v2:Field/InvalidPageSize
  title: Invalid Page Size
  detail: The page-size value was outside the permitted range.
  source_operations: [listBankingProducts]
- status: 404
  code: urn:au-cds:error:v2:Resource/NotFound
  title: Unavailable Resource
  detail: The requested resource (productId) exists in the standard but is not available.
  source_operations: [getBankingProductDetail]
- status: 404
  code: urn:au-cds:error:v2:Resource/Invalid
  title: Invalid Resource
  detail: The supplied productId is not a valid resource identifier.
  source_operations: [getBankingProductDetail]
- status: 406
  code: urn:au-cds:error:v2:Header/UnsupportedVersion
  title: Unsupported Version
  detail: >-
    None of the requested API versions are supported. The response echoes the
    supported version in the x-v response header (confirmed live: x-v 3 -> 406).
  source_operations: [listBankingProducts, getBankingProductDetail]
- status: 422
  code: urn:au-cds:error:v2:Field/InvalidPage
  title: Invalid Page
  detail: The requested page is out of range for the result set.
  source_operations: [listBankingProducts]