<root-XML localName="document" namespaceURI="http://developer.apple.com/namespaces/sl" />
    <sub-class-of type="application/vnd.apple.iwork" />
    <glob pattern="*.pages"/>
  </mime-type>
  <mime-type type="application/vnd.apple.numbers">
    <root-XML localName="document" namespaceURI="http://developer.apple.com/namespaces/ls" />
    <sub-class-of type="application/vnd.apple.iwork" />

  
  Action required for custom scheduler plugin developers:
  Plugins **have to** implement a QueueingHint for Pod/Update event if the rejection from them could be resolved by updating unscheduled Pods themselves.
  Example: suppose you develop a custom plugin that denies Pods that have a `schedulable=false` label. 

  * Plugins

      * Introduces the ability to extend kubectl by adding third-party plugins. Developer preview, please refer to the documentation for instructions about how to use it. ([#37499](https://github.com/kubernetes/kubernetes/pull/37499), [@fabianofranz](https://github.com/fabianofranz))

Pruning is activated by setting `spec.preserveUnknownFields: false` in the CustomResourceDefinition. A future apiextensions.k8s.io/v1 variant of CRDs will enforce pruning.

  // +optional
  optional AWSElasticBlockStoreVolumeSource awsElasticBlockStore = 2;

  // hostPath represents a directory on the host.
  // Provisioned by a developer or tester.
  // This is useful for single-node development and testing only!
  // On-host storage is not supported in any way and WILL NOT WORK in a multi-node cluster.

content type of `text/plain` containing JSON data would be accepted and the JSON data would be extracted.

But requests with content type `text/plain` are exempt from [CORS](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS) preflights, for being considered [Simple requests](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS#simple_requests). So, the browser would execute them right away including cookies, and the text content could be a JSON string that would be parsed and accepted...

### SIG Windows development tools

* kubeadm: Enable kubelet client certificate rotation ([#52196](https://github.com/kubernetes/kubernetes/pull/52196), [@luxas](https://github.com/luxas))
* Scheduler predicate developer should respect equivalence class cache ([#52146](https://github.com/kubernetes/kubernetes/pull/52146), [@resouer](https://github.com/resouer))

* kubeadm: Enable kubelet client certificate rotation ([#52196](https://github.com/kubernetes/kubernetes/pull/52196), [@luxas](https://github.com/luxas))
* Scheduler predicate developer should respect equivalence class cache ([#52146](https://github.com/kubernetes/kubernetes/pull/52146), [@resouer](https://github.com/resouer))

### API-machinery