本文讨论了如何在面向对象模型中引入连接操作，包括其形式、特点和实现方面。

This paper deals with the introduction of join operation into object-oriented data model, including its format, characteristics and implementation.

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Round Robin (RR)：新的引入连接被依次指派给每个realserver。

Round Robin (RR) : New incoming connections are assigned to each realserver in turn.

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Indigo的另一个基本特性是：引入连接器(提供安全可靠的通信的托管框架)用于访问服务端点。

Another foundational feature in Indigo is introduction of connectors - managed framework, providing secure and reliable communications - for accessing of service endpoints.

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