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How to implement ONVIF Pull-point style event notification (ET01)

Warning! This is an implementation hint article. Read this first.

Calling sequence

  1. This sequence only applies when Event.Template (explained here) is set to ET01.
  2. Calls CreatePullPointSubscription
  3. Repeatedly calls to PullMessage to get notification message. Notification schema is consolidated at here. (Please pay attention to ET01, which is gathered from the spec)