某些存储库具有不可改变的项目类，对其的设定是基于项目类型的；而其他的存储库则允许存储库管理员或终端用户对类进行定义，对其的设定是基于项目的。

Some repositories have immutable item classes that are set based on the item type, while others will allow a repository administrator or end user to define the classes that can be set on an item.

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如果相同中介流处理多种消息类型，您可以使用此新原语定义XPath表达式，以将消息指引到不同的终端。

If multiple message types are processed by the same mediation flow, you can use this new primitive to define XPath expressions to direct messages out different terminals.

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TypeFilter可以具有多个输出终端，通过判断工具中定义的消息类型是否匹配运行时中的消息类型，决定采用哪一种路径路由消息。

The TypeFilter can have multiple output terminals that route the message down different paths, depending on whether the message type defined in the tooling matches the type found at runtime.

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