主题居住空间专题设计 living room design theme topic ; Theme space theme design
在创建MQTT应用程序时，必须认真将主题空间设计得符合逻辑，并且支持灵活订阅。
When you create your MQTT application, you must carefully plan the topic space to be logical and to enable flexible subscriptions.
消费者不会知道消息是从何处产生的，除非明确地将该消息设计到消息内容计划或着主题空间中。
Unless explicitly designed into the message content schema or topic space, a consumer has no knowledge of where a message originated.
在包中已发布的所有名称空间、查询主题和查询项的设计语言在包第一次发布后不能发生改变。
The design language name of all namespaces, query subjects, and query items that are published in a package must never change after the package is initially published.
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