Destination: An abstraction of either a message topic or a message queue.
Destination：消息主题或消息队列的抽象。
A Channel number is a header number identifying the message topic (such as' Weather Report 'or' Traffic Information ').
通道号是标识消息主题的头部号(如‘气象报告’或‘交通信息’)。
Each error message topic provides information on possible causes for an error and potential solutions or workarounds to solve the problem.
每一错误消息主题都提供有关可能的错误原因和解决问题的潜在解决方案或办法的信息。
The producer then matches the message and associated topic against the interest registered in each subscription in the list.
接着，生产者会根据列表的每个订阅中注册的兴趣来匹配消息和相关主题。
When using pub/sub, the number of subscribers per topic will affect message throughput as this will determine how many output messages have to be written per publication on a topic.
使用发布/订阅时，每个主题的订阅者数量将影响消息吞吐量，因为这将决定主题上的每个发布操作将必须写入多少个输出消息。
Similarly, the routes associated with a policy define a topic on which to transmit the message.
类似地，与一个策略关联的路由定义一个主题，将在这个主题之上传输消息。
You must design the topic tree such that each copy of the message flow can serve a particular topic or portion of the tree.
您必须对主题树进行相应的设计，以使消息流的每个副本可以服务于一个特定的主题或树中特定的部分。
The first parameter, of type string, is the topic this message arrived on.
第一个参数为字符串类型，它是此消息的主题。
As illustrated in Figure 3, when a scope ends, a message is published to a topic.
如图3所示，当一个范围结束时，一个消息被发布到一个主题。
In this model, an application publishes a message to a certain destination called a topic; there, the message is picked up by any application that has subscribed to that particular topic.
在这个模型中，一个应用程序将消息发布到某个被称为主题的目的地那里，该消息被任意已经预定了这个特定主题的应用程序接收。
A broker sits in between the publisher and subscribers and sends a copy of each message under a certain topic to the appropriate subscribers.
发布程序和订阅程序之间有一个代理，它将某个主题下的每条消息的副本发送给适当的订阅程序。
Unless explicitly designed into the message content schema or topic space, a consumer has no knowledge of where a message originated.
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。
The broker matches an inbound message to any subscribers using this topic and delivers a copy of the message to each matching subscriber.
代理为所有使用此主题的订阅方匹配一条入站消息，并将该消息的副本发送给每个匹配的订阅方。
The last retained message published on a topic is immediately sent to a client upon subscription to that topic.
将在主题上发布的最终保留的消息直接发送到订阅该主题的客户机。
Like topic selection, message selection criteria expressions are defined using a SQL-like syntax, which must resolve to a Boolean value.
和主题选择一样，消息选择标准表达式使用sql样式的语法定义，该语法必须求解出一个布尔值。
Keep in mind that an application cannot publish to a JMS topic whose topic name contains wildcards, because a publisher can only publish a message to a single topic.
要谨记，应用程序不能发布到主题名称中包含通配符的JMS主题，因为发布者只能将消息发布到单个主题。
Publishers typically add a topic header to the message that classifies the message according to the topic model or classification scheme of the notifications.
发布者通常向消息添加一个主题头部，根据通知的主题模型或分类模式确定该消息的类别。
When an application publishes a message to a topic within that topic space, the message flows to every publication point for that topic space, as shown in Figure 5.
当应用程序将消息发布到主题空间中的主题上时，消息将通过该主题空间的所有发布点，如图5所示。
A message queued to a topic is automatically placed on the private queue of any entity who is subscribed to that topic.
排队到主题的消息自动放置在任何订阅过该主题的实体的专用队列中。
In line 27 you construct the message to be published using the topic name.
在第27行，使用主题名称构造消息以待发布。
A subscriber is a message consumer that receives messages under a particular topic, published by a message publisher.
订阅者是消息使用者，其接收特定主题下由消息发布者发布的消息。
It is coded to send a topic message.
它被编码以发送主题消息。
Lines 6-7 show the topic name to which this message will be published.
第6 - 7行展示了将被发布的消息的主题名称。
When sending a message, the sending party (the publisher) specifies a target topic.
发送消息时，由发送方指定目标主题。
In line 32 you use the topic publisher to publish the message to the topic queue.
在第32行，使用主题发布者向主题队列发布消息。
Each subscriber that subscribes to a topic will receive a copy of every message that is published to that topic, as shown in Figure 1.
订阅主题的每个订户将收到发布到该主题的所有信息的副本，如图1所示。
Then the ESB forwards this message to the topic, and the medical offices get it in a reliable way.
然后ESB 将此消息转发到主题，从而使得诊所可靠地得到此消息。
A publish-and-subscribe message destination is known as a topic.
发布-订阅消息的目的地称为主题。
The value is validated when the entity is already created and the JMS message is posted to the topic.
创建实体且将JMS消息发布到主题后，就对值进行验证。
The message will remain on the topic until all subscribers to the topic have retrieved a copy of the message or until its durability has expired, whichever comes first.
该消息将一直维持在主题中，直到这个主题的所有订阅者都取走了该消息的一个副本，或者该消息的耐久性时间已到期，不管发生的是上述中的哪种情况，该消息都将被从这个主题中删除。
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