rubric_metadata:
  name: "C2PA Text Asset Conformance Rubric"
  issuer: "C2PA Conformance Task Force"
  date: "2026-08-06T00:00:00Z"
  version: "1.0"
  language: en

variables:
  # HTML validation failure codes retained in the C2PA validation vocabulary.
  "$html_text_error_codes":
    - "manifest.html.multipleManifests"

  # Text MIME types recognized by this rubric. These groups mirror the CPL
  # schema's C2PA 2.4 text support structure.
  "$text_html_mime_types":
    - "text/html"

  "$text_unstructured_mime_types":
    - "text/plain"
    - "text/csv"
    - "text/tab-separated-values"

  "$text_structured_mime_types":
    - "text/markdown"
    - "text/xml"
    - "application/xml"
    - "application/xhtml+xml"

  "$text_mime_types":
    - "text/html"
    - "text/plain"
    - "text/csv"
    - "text/tab-separated-values"
    - "text/markdown"
    - "text/xml"
    - "application/xml"
    - "application/xhtml+xml"

expressions:
  _activeManifest: "manifests[0]"
  _validationResults: '(_activeManifest().validationResults || { failure: [{code: "MISSING_VALIDATION_RESULTS"}] })'

---

#
# Text-specific well-formedness checks
#

- id: "text:no_html_text_errors"
  description: "No HTML-specific manifest location failures in validation results"
  failIfMatched: true
  expression: |
    _validationResults().failure[?contains($html_text_error_codes, code)].code
  reportText:
    "true":
      en: "HTML text manifest references are well-formed"
    "false":
      en: "HTML text manifest reference failures detected"

#
# Text asset identity checks
#

- id: "text:is_text_asset"
  description: "Active manifest declares a supported text MIME type in dc:format"
  expression: |
    contains($text_mime_types, _activeManifest().assertions.'c2pa.actions.v2'.actions[0].parameters.'dc:format') ||
    contains($text_mime_types, _activeManifest().'claim.v2'.dc_format)
  reportText:
    "true":
      en: "Asset declares a supported text MIME type"
    "false":
      en: "Asset does not declare a supported text MIME type"

#
# Text-specific structural checks
#

- id: "text:hard_binding_present"
  description: "At least one c2pa.hash.data assertion provides content binding"
  expression: |
    _activeManifest().assertions.'c2pa.hash.data' != `null`
  reportText:
    "true":
      en: "Hard binding assertion present for text content"
    "false":
      en: "No hard binding assertion found"

- id: "text:exclusions_defined"
  description: "Hash data assertion includes exclusions for the text manifest region"
  expression: |
    _activeManifest().assertions.'c2pa.hash.data' != `null` &&
    _activeManifest().assertions.'c2pa.hash.data'.exclusions != `null` &&
    length(_activeManifest().assertions.'c2pa.hash.data'.exclusions) > `0`
  reportText:
    "true":
      en: "Hash exclusions define text manifest boundaries"
    "false":
      en: "No hash exclusions defined for text manifest boundaries"

#
# Text-specific inception checks
#

- id: "text:inception_action_present"
  description: "Active manifest contains a c2pa.created action"
  expression: |
    _activeManifest().assertions.'c2pa.actions.v2' != `null` &&
    length(_activeManifest().assertions.'c2pa.actions.v2'.actions[?action == "c2pa.created"]) > `0`
  reportText:
    "true":
      en: "Text asset has an inception action"
    "false":
      en: "No inception action found"

- id: "text:inception_has_dst"
  description: "Inception action declares a digitalSourceType"
  expression: |
    _activeManifest().assertions.'c2pa.actions.v2' != `null` &&
    length(_activeManifest().assertions.'c2pa.actions.v2'.actions[?action == "c2pa.created" && digitalSourceType != `null`]) > `0`
  reportText:
    "true":
      en: "Inception action declares a digitalSourceType"
    "false":
      en: "Inception action missing digitalSourceType"