{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://cityresourcegraph.com/schemas/shared_asset.json",
  "title": "Shared Asset Entity",
  "description": "Equipment/Infrastructure at specific sites that can be shared among businesses",
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "format": "uuid",
      "description": "Unique shared asset identifier"
    },
    "site_id": {
      "type": "string",
      "format": "uuid",
      "description": "Site where this asset is located"
    },
    "owner_business_id": {
      "type": "string",
      "format": "uuid",
      "description": "Business that owns this asset"
    },
    "type": {
      "type": "string",
      "enum": ["infrastructure", "utilities", "equipment", "space"],
      "description": "Type of shared asset"
    },
    "description": {
      "type": "string",
      "maxLength": 1000,
      "description": "Detailed description of the asset"
    },
    "capacity": {
      "type": "number",
      "description": "Asset capacity (kW, m3/h, m2, etc.)"
    },
    "capacity_unit": {
      "type": "string",
      "maxLength": 50,
      "description": "Unit of capacity measurement"
    },
    "utilization_rate": {
      "type": "number",
      "minimum": 0,
      "maximum": 1,
      "description": "Current usage percentage (0-1)"
    },
    "availability_period": {
      "type": "string",
      "maxLength": 255,
      "description": "When the asset is available for sharing"
    },
    "cost_sharing_model": {
      "type": "string",
      "maxLength": 255,
      "description": "How costs are shared among users"
    },
    "current_users": {
      "type": "array",
      "items": {
        "type": "string",
        "format": "uuid"
      },
      "description": "Business IDs currently using this asset"
    },
    "maintenance_schedule": {
      "type": "string",
      "maxLength": 500,
      "description": "Scheduled maintenance periods"
    },
    "operational_status": {
      "type": "string",
      "enum": ["operational", "maintenance", "out_of_service"],
      "default": "operational",
      "description": "Current operational status"
    },
    "created_at": {
      "type": "string",
      "format": "date-time"
    },
    "updated_at": {
      "type": "string",
      "format": "date-time"
    }
  },
  "required": ["id", "site_id", "owner_business_id", "type", "description"],
  "additionalProperties": false
}