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# Deployment

## Deployment Attributes

This document defines attributes for software deployments.

| Attribute                | Type   | Description                                                                                                        | Examples                | Stability                                                        |
| ------------------------ | ------ | ------------------------------------------------------------------------------------------------------------------ | ----------------------- | ---------------------------------------------------------------- |
| `deployment.environment` | string | Name of the [deployment environment](https://wikipedia.org/wiki/Deployment_environment) (aka deployment tier). [1] | `staging`; `production` | ![Experimental](https://img.shields.io/badge/-experimental-blue) |

**[1]:** `deployment.environment` does not affect the uniqueness constraints defined through
the `service.namespace`, `service.name` and `service.instance.id` resource attributes.
This implies that resources carrying the following attribute combinations MUST be
considered to be identifying the same service:

- `service.name=frontend`, `deployment.environment=production`
- `service.name=frontend`, `deployment.environment=staging`.
