for background information.

### Scheduling

  - Opaque Integer Resources (OIRs) are deprecated and will be removed in
    version 1.9. Extended Resources (ERs) are a drop-in replacement for OIRs. You can use
    any domain name prefix outside of the `kubernetes.io/` domain instead of the
    `pod.alpha.kubernetes.io/opaque-int-resource-` prefix.

## Notable Features

### Workloads API (apps/v1beta2)

  repeated Namespace items = 2;
}

// NamespaceSpec describes the attributes on a Namespace.
message NamespaceSpec {
  // Finalizers is an opaque list of values that must be empty to permanently remove object from storage.
  // More info: https://kubernetes.io/docs/tasks/administer-cluster/namespaces/
  // +optional
  repeated string finalizers = 1;
}

- Added alpha field storageVersionHash to the discovery document for each resource. Its value must be treated as opaque by clients. Only equality comparison on the value is valid. ([#73191](https://github.com/kubernetes/kubernetes/pull/73191), [@caesarxuchao](https://github.com/caesarxuchao))

- The `storageVersionHash` feature is now beta. `StorageVersionHash` is a field in the discovery document of each resource. It enables clients to detect whether the storage version of that resource has changed. Its value must be treated as opaque by clients. Only equality comparison on the value is valid. ([#78325](https://github.com/kubernetes/kubernetes/pull/78325), [@caesarxuchao](https://github.com/caesarxuchao))

*   Opaque integer resources (OIR), which were (deprecated in v1.8.), have been removed. ([#55103](https://github.com/kubernetes/kubernetes/pull/55103),[ @ConnorDoyle](https://github.com/ConnorDoyle))

### **Storage**