{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/AbsExpression",
  "title": "AbsExpression",
  "type": "object",
  "required": [
    "abs"
  ],
  "properties": {
    "abs": {
      "$ref": "#/components/schemas/Expression"
    }
  }
}