{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Bangladeshi Concert / Festival Event",
  "type": "object",
  "required": ["id", "name", "date", "type"],
  "properties": {
    "id": {
      "type": "string",
      "description": "URL-friendly slug, prefixed by year where possible (e.g., 2023-artcell-otritio-launch)"
    },
    "name": {
      "type": "string",
      "description": "Event or festival name"
    },
    "date": {
      "type": "string",
      "format": "date",
      "description": "ISO date (YYYY-MM-DD); use YYYY-MM-01 or YYYY-01-01 placeholders when only year/month is known, and note precision in 'date_precision'"
    },
    "date_precision": {
      "type": "string",
      "enum": ["day", "month", "year", "approximate"],
      "default": "day"
    },
    "type": {
      "type": "string",
      "enum": ["concert", "festival", "album-launch", "university-fest", "diaspora-tour", "battle-of-bands", "corporate-branded", "charity", "other"]
    },
    "venue": {
      "type": "object",
      "properties": {
        "name": { "type": "string" },
        "city": { "type": "string" },
        "country": { "type": "string", "default": "Bangladesh" },
        "venue_type": {
          "type": "string",
          "enum": ["stadium", "open-air", "convention-centre", "university-campus", "club", "theatre", "outdoor-park", "other"]
        }
      }
    },
    "organizer": {
      "type": "string",
      "description": "Promoter, brand, university, or organization running the event"
    },
    "artists": {
      "type": "array",
      "items": {
        "type": "object",
        "required": ["artist_id"],
        "properties": {
          "artist_id": {
            "type": "string",
            "description": "Matches the 'id' field in the corresponding artist metadata.json (data/artists/<id>/metadata.json)"
          },
          "billing": {
            "type": "string",
            "enum": ["headliner", "co-headliner", "support", "guest"]
          }
        }
      }
    },
    "genres_represented": {
      "type": "array",
      "items": { "type": "string" }
    },
    "estimated_attendance": {
      "type": "integer",
      "description": "Best-available public estimate; omit if unknown rather than guessing"
    },
    "attendance_confidence": {
      "type": "string",
      "enum": ["reported", "estimated", "unknown"]
    },
    "notes": {
      "type": "string",
      "description": "Historical significance, notable incidents, media coverage context"
    },
    "sources": {
      "type": "array",
      "items": {
        "type": "object",
        "properties": {
          "title": { "type": "string" },
          "url": { "type": "string" },
          "type": { "type": "string" },
          "accessed": { "type": "string" }
        }
      }
    },
    "tags": {
      "type": "array",
      "items": { "type": "string" }
    },
    "last_updated": { "type": "string", "format": "date" }
  }
}