let _horizon_type      = [| 'Days, 'Weeks, 'Months, 'Quarters, 'Years, 'Ongoing |] in
let _pole_type         = [| 'Yang, 'Yin, 'Spiral |] in
let _audience_type     = [| 'Developer, 'EndUser, 'Contributor, 'Agent, 'PublicInternet |] in
let _channel_type      = [| 'GitRepo, 'PublishedSite, 'RSSFeed, 'Newsletter, 'SocialFeed, 'CLI, 'Docs |] in
let _seo_intent_type   = [| 'Organic, 'Reference, 'Community, 'None |] in
let _severity_type     = [| 'Hard, 'Soft |] in
let _channel_status    = [| 'Active, 'Planned, 'Paused, 'Retired |] in

let _purpose_declaration_type = {
  id               | String,
  name             | String,
  pole             | _pole_type,
  statement        | String,
  elaboration      | String,
  primary_audience | Array _audience_type,
  anti_purpose     | String,
  horizon          | _horizon_type,
} in

let _publication_intent_type = {
  id                | String,
  name              | String,
  description       | String,
  channels          | Array _channel_type,
  readiness_gate    | String,
  trigger_condition | String,
  anti_patterns     | Array String,
} in

let _content_objective_type = {
  id                     | String,
  name                   | String,
  description            | String,
  target_audience        | Array _audience_type,
  content_kinds          | Array String,
  purpose_alignment_note | String,
  seo_intent             | _seo_intent_type,
  horizon                | _horizon_type,
  active                 | Bool | default = true,
} in

let _validation_criteria_type = {
  id         | String,
  name       | String,
  description | String,
  check_hint | String,
  severity   | _severity_type,
  applies_to | Array String,
} in

let _seo_criterion_type = {
  id         | String,
  name       | String,
  description | String,
  rationale  | String,
  check_hint | String,
  severity   | _severity_type,
  applies_to | Array String,
} in

let _propagation_channel_type = {
  id              | String,
  name            | String,
  channel         | _channel_type,
  description     | String,
  status          | _channel_status,
  target_audience | Array _audience_type,
  content_kinds   | Array String,
  seo_role        | _seo_intent_type | default = 'None,
  frequency       | String | optional,
  gate_id         | String | optional,
} in

let _purpose_file_type = {
  declaration          | _purpose_declaration_type,
  publication_intent   | _publication_intent_type,
  content_objectives   | Array _content_objective_type,
  validation_criteria  | Array _validation_criteria_type,
  seo_criteria         | Array _seo_criterion_type,
  propagation_channels | Array _propagation_channel_type,
} in

{
  Horizon             = _horizon_type,
  Pole                = _pole_type,
  Audience            = _audience_type,
  Channel             = _channel_type,
  SeoIntent           = _seo_intent_type,
  Severity            = _severity_type,
  ChannelStatus       = _channel_status,
  PurposeDeclaration  = _purpose_declaration_type,
  PublicationIntent   = _publication_intent_type,
  ContentObjective    = _content_objective_type,
  ValidationCriteria  = _validation_criteria_type,
  SeoCriterion        = _seo_criterion_type,
  PropagationChannel  = _propagation_channel_type,
  PurposeFile         = _purpose_file_type,
}