EJB 3.0 规范使用标注（和 XML）来应用容器服务。

The EJB 3.0 specification uses annotations (in addition to XML) to apply container services.

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已有开源和商用服务器支持EJB3.0，EJB3.0大量使用标注。

Open source and commercial implementations of pre-release EJB 3.0 specifications are already available from JBoss and Oracle. EJB 3.0 makes heavy use of Java annotations.

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使用标注，Contract4J 定义了模式形式的协议，即一种接口，用来表达合约信息。

Using annotations, Contract4J defines a pattern-like protocol, a kind-of interface, for expressing contract information.

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