{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://chidigitalexperience.org/data/schema/v1.json",
  "title": "CHI Digital Experience Competition — Programme Feed (schemeVersion 7)",
  "description": "DRAFT — top-level shape only, generated from inspecting real chi2025/chi2026 feed files. This is the conference system's native export format, not a bespoke schema for this competition: field names are camelCase, dates are epoch milliseconds, and there is no top-level revision/status/last_modified field. Collections beyond the top level (sessions, contents, people, etc.) are not yet fully typed below — treat this file as a starting point, not a complete or validated schema, until it has been checked against all of chi2025, chi2026, and sandbox.",
  "type": "object",
  "required": ["schemeVersion", "conference", "sessions", "contents", "people"],
  "properties": {
    "schemeVersion": {
      "type": "integer",
      "description": "Native export format version from the conference system. Currently 7. Not a per-edition content revision — see version.json for that."
    },
    "cc_licence": {
      "type": "string",
      "description": "Human-readable licence statement embedded in the feed itself. See /data/LICENCE for the full licence text."
    },
    "conference": {
      "type": "object",
      "description": "Conference metadata: id, shortName, year, startDate/endDate (epoch ms), fullName, url, location, timeZoneOffset, timeZoneName, logoUrl, name.",
      "required": ["id", "year", "startDate", "endDate", "name"],
      "properties": {
        "id": { "type": "integer" },
        "shortName": { "type": "string" },
        "year": { "type": "integer" },
        "startDate": { "type": "integer", "description": "Epoch milliseconds" },
        "endDate": { "type": "integer", "description": "Epoch milliseconds" },
        "fullName": { "type": "string" },
        "url": { "type": "string", "format": "uri" },
        "location": { "type": "string" },
        "timeZoneOffset": { "type": "integer", "description": "Minutes offset from UTC" },
        "timeZoneName": { "type": "string" },
        "name": { "type": "string" }
      }
    },
    "publicationInfo": {
      "type": "object",
      "description": "Publication/draft status of the programme, as maintained by the conference system. publicationInfo.version is the closest analogue to a content revision number — not a top-level `revision` field.",
      "properties": {
        "isDraft": { "type": "boolean" },
        "isProgramEnabled": { "type": "boolean" },
        "publicationDate": { "type": "string" },
        "publicationStatus": { "type": "string" },
        "version": { "type": "integer" }
      }
    },
    "sponsors": { "type": "array", "description": "Not yet typed in detail." },
    "sponsorLevels": { "type": "array", "description": "Not yet typed in detail." },
    "floors": { "type": "array", "description": "Not yet typed in detail." },
    "rooms": {
      "type": "array",
      "description": "Venue rooms.",
      "items": {
        "type": "object",
        "required": ["id", "name"],
        "properties": {
          "id": { "type": "integer" },
          "name": { "type": "string" },
          "setup": { "type": ["string", "null"] },
          "typeId": { "type": ["integer", "null"] },
          "capacity": { "type": ["integer", "null"] }
        }
      }
    },
    "tracks": {
      "type": "array",
      "description": "Thematic/format groupings.",
      "items": {
        "type": "object",
        "required": ["id", "name"],
        "properties": {
          "id": { "type": "integer" },
          "name": { "type": "string" }
        }
      }
    },
    "contentTypes": { "type": "array", "description": "Not yet typed in detail." },
    "timeSlots": { "type": "array", "description": "Not yet typed in detail." },
    "sessions": {
      "type": "array",
      "description": "Scheduled sessions. Each references a room, a time slot, and the contents/people within it.",
      "items": {
        "type": "object",
        "required": ["id", "name"],
        "properties": {
          "id": { "type": "integer" },
          "name": { "type": "string" },
          "isParallelPresentation": { "type": "boolean" },
          "typeId": { "type": ["integer", "null"] },
          "roomId": { "type": ["integer", "null"] },
          "chairIds": { "type": "array", "items": { "type": "integer" } },
          "contentIds": { "type": "array", "items": { "type": "integer" } },
          "timeSlotId": { "type": ["integer", "null"] }
        }
      }
    },
    "events": {
      "type": "array",
      "description": "Standalone scheduled events (e.g. receptions, plenaries) distinct from paper sessions. Carry their own startDate/endDate in epoch ms rather than a timeSlotId.",
      "items": {
        "type": "object",
        "required": ["id", "name", "startDate", "endDate"],
        "properties": {
          "id": { "type": "integer" },
          "name": { "type": "string" },
          "roomId": { "type": ["integer", "null"] },
          "startDate": { "type": "integer" },
          "endDate": { "type": "integer" },
          "presenterIds": { "type": "array", "items": { "type": "integer" } }
        }
      }
    },
    "contents": {
      "type": "array",
      "description": "Papers, talks, and other individual contributions. Includes abstract, authors, tags/keywords, and links back to the session(s)/event(s) that contain them.",
      "items": {
        "type": "object",
        "required": ["id", "title"],
        "properties": {
          "id": { "type": "integer" },
          "typeId": { "type": ["integer", "null"] },
          "title": { "type": "string" },
          "isBreak": { "type": "boolean" },
          "trackId": { "type": ["integer", "null"] },
          "tags": { "type": "array", "items": { "type": "string" } },
          "keywords": { "type": "array", "items": { "type": "string" } },
          "sessionIds": { "type": "array", "items": { "type": "integer" } },
          "eventIds": { "type": "array", "items": { "type": "integer" } },
          "abstract": { "type": ["string", "null"] },
          "authors": { "type": "array" },
          "recognitionIds": { "type": "array", "items": { "type": "integer" } }
        }
      }
    },
    "people": {
      "type": "array",
      "description": "Authors, presenters, and chairs.",
      "items": {
        "type": "object",
        "required": ["id"],
        "properties": {
          "id": { "type": "integer" },
          "firstName": { "type": ["string", "null"] },
          "lastName": { "type": ["string", "null"] },
          "middleInitial": { "type": ["string", "null"] },
          "affiliations": { "type": "array" }
        }
      }
    },
    "recognitions": { "type": "array", "description": "Awards/recognitions attached to contents. Not yet typed in detail." }
  }
}