使用者如何找到它需要调用的服务的提供者？
How does a consumer find the providers of the service it wants to invoke?
具备可扩展性和灵活性，它允许服务提供者和使用者使用特定行业基于XML的标准，如hl7。
Be extensible and flexible in the sense that it allows service providers and consumers to use industry-specific XML-based standards such as HL7.
它提供服务提供者与请求者之间的连接性，方便他们即使在不精确匹配的情况下也可以进行交互。
It provides connectivity among service providers and requesters, facilitating their interactions even if they're not exactly matched.
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