{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "object",
  "title": "Data Catalog Metadata Schema",
  "description": "Schema for data catalog metadata",
  "properties": {
    "id": {
      "type": "string",
      "description": "Unique identifier for the dataset"
    },
    "name": {
      "type": "string",
      "description": "Human-readable name of the dataset"
    },
    "description": {
      "type": "string",
      "description": "Description of the dataset"
    },
    "source": {
      "type": "string",
      "description": "Source system or project"
    },
    "storage": {
      "type": "object",
      "properties": {
        "type": {
          "type": "string",
          "enum": ["s3", "minio", "azure-blob", "gcs"],
          "description": "Storage type"
        },
        "bucket": {
          "type": "string",
          "description": "Bucket or container name"
        },
        "path": {
          "type": "string",
          "description": "Path within bucket"
        }
      },
      "required": ["type", "bucket"]
    },
    "schema": {
      "type": "object",
      "description": "Data schema definition"
    },
    "format": {
      "type": "string",
      "enum": ["parquet", "json", "csv", "avro"],
      "description": "Data format"
    },
    "tags": {
      "type": "array",
      "items": {
        "type": "string"
      },
      "description": "Tags for categorization"
    },
    "owner": {
      "type": "string",
      "description": "Owner or team responsible"
    },
    "created": {
      "type": "string",
      "format": "date-time",
      "description": "Creation timestamp"
    },
    "updated": {
      "type": "string",
      "format": "date-time",
      "description": "Last update timestamp"
    },
    "access": {
      "type": "object",
      "properties": {
        "level": {
          "type": "string",
          "enum": ["public", "internal", "restricted"],
          "description": "Access level"
        },
        "permissions": {
          "type": "array",
          "items": {
            "type": "string",
            "enum": ["read", "write", "delete"]
          }
        }
      }
    }
  },
  "required": ["id", "name", "source", "storage"]
}