# 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` |  | **[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`.