An example of such a pattern is the publisher-subscriber pattern, consisting of a module (the publisher) that must send copies of its "publications" to other modules (the subscribers).

这种模式的一个例子就是出版商和订户的模式：一个模块(出版商)这种模式的一个例子就是出版商和订户的模式：一个模块(出版商)将其出版物发送给其他模块(订户)。

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Only a topic couples the publisher and subscriber; publishers publish to a topic and subscribers subscribe to a topic.

只有主题将发布者和订阅者联系起来；发布者发布某个主题，而订阅者则订阅该主题。

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The match may be exact if the publisher and subscriber specify exactly the same topic name, or the subscriber may specify a wildcard to match many different published topics.

如果发布方和订阅方指定的是完全相同的主题名称，则可能是精确匹配，否则订阅方可以指定通配符来匹配很多不同的发布主题。

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That means the technology giant takes a cut of each sale, along with a per-subscriber fee paid to 29th Street that is negotiated with each publisher.

WSJ: Pushing Editorial Into World of Apps