Help Center> Simple Message Notification> FAQs> What Are the Requirements for an SMN Topic Name?
Updated at: 2022-04-11 GMT+08:00

What Are the Requirements for an SMN Topic Name?

  • A topic name can contain 1 to 255 characters, including letters, digits, hyphens (-), and underscores (_).
  • Each topic name in an account must be unique.
  • After a topic is created, SMN generates a topic URN composed of the service name (SMN), region name, project ID, and topic name to uniquely identify the topic. When you call an API to create a topic, a topic URN will be returned. The URN will be used whenever a publisher or subscriber performs operations relating to the topic.
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