---
title: "op"
url: https://develop.sentry.dev/sdk/foundations/transport/event-payloads/properties/op/
---

# undefined

* `op`

  *Recommended*. Short code identifying the type of operation the span is measuring.

For more details, see [Sentry's conventions around span operations](https://develop.sentry.dev/sdk/performance/span-operations.md).

```json
{
  "op": "db.query"
}
```