---
features:
  - Introduce a new resource called Topic into Zaqar.
    Topic is a concept from AWS Simple Notification Service (SNS), it will has
    relevance with subscriptions. User can send message to a topic, and then
    the subscribers will get the message according to different protocols,
    like http, email, sms, etc. This feature will help Zaqar to split
    Messaging Queue Service and Notification Service clearly.