<ul>
	<li>an
	    <a href="#Identifiers">identifier</a>
	</li>

	<li>an
	    <a href="#Integer_literals">integer</a>,
	    <a href="#Floating-point_literals">floating-point</a>,
	    <a href="#Imaginary_literals">imaginary</a>,
	    <a href="#Rune_literals">rune</a>, or
	    <a href="#String_literals">string</a> literal
	</li>

	<li>one of the <a href="#Keywords">keywords</a>
	    <code>break</code>,

* StorageObjectInUseProtection is now GA ([ref](https://github.com/kubernetes/enhancements/issues/498)) and ([ref](https://github.com/kubernetes/enhancements/issues/499))

#### Graduated to Beta

* Supporting out-of-tree/external cloud providers is now considered beta ([ref](https://github.com/kubernetes/enhancements/issues/88))

* CustomResourceDefinitions: OpenAPI v3 validation schemas containing `$ref`references are no longer permitted. Before upgrading, ensure CRD definitions do not include those `$ref` fields. ([#58438](https://github.com/kubernetes/kubernetes/pull/58438), [@carlory](https://github.com/carlory))

### Federation

## Other notable changes

### API Machinery

- Remove `GetReference()` and `GetPartialReference()` function from `pkg/api/ref`, as the same function exists also in `staging/src/k8s.io/client-go/tools/ref` ([#80361](https://github.com/kubernetes/kubernetes/pull/80361), [@wojtek-t](https://github.com/wojtek-t))

- The default value for node-monitor-grace-period has been increased to 50s (earlier 40s) (Ref - https://github.com/kubernetes/kubernetes/issues/121793) ([#126287](https://github.com/kubernetes/kubernetes/pull/126287), [@devppratik](https://github.com/devppratik)) [SIG API Machinery, Apps and Node]

- The `kubernetes.io/created-by` annotation is deprecated and will be removed in version 1.9.
  Use [ControllerRef](https://github.com/kubernetes/community/blob/master/contributors/design-proposals/api-machinery/controller-ref.md) instead to determine which controller, if any, owns an object.

 - The `batch/v2alpha1.CronJob` is deprecated in favor of `batch/v1beta1`.

### Other notable changes

* CustomResourceDefinitions: OpenAPI v3 validation schemas containing `$ref`references are no longer permitted (valid references could not be constructed previously because property ids were not permitted either). Before upgrading, ensure CRD definitions do not include those `$ref` fields. ([#58438](https://github.com/kubernetes/kubernetes/pull/58438), [@carlory](https://github.com/carlory))

  <mime-type type="message/http"/>
  <mime-type type="message/imdn+xml"/>

  <mime-type type="message/news">
    <magic priority="60">
      <match value="Path:" type="string" offset="0" />
      <match value="Xref:" type="string" offset="0" />
    </magic>
    <magic priority="50">
      <match value="Article" type="string" offset="0" />
    </magic>
    <sub-class-of type="text/x-tika-text-based-message"/>

- This code change fixes the bug that UDP services would trigger unnecessary LoadBalancer updates. The root cause is that a field not working for non-TCP protocols is considered.
  ref: https://github.com/kubernetes-sigs/cloud-provider-azure/pull/1090 ([#107981](https://github.com/kubernetes/kubernetes/pull/107981), [@lzhecheng](https://github.com/lzhecheng))