As long as service interfaces are explicitly defined and of appropriate granularity, EAI middleware can ensure that the interoperability and location independence principles of SOA are met.

只要服务接口已经明确定义并有合适的粒度，EAI中间件就能确保满足soa的互操作性和位置无关性原则。

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The EA will define principles and goals and set direction on such issues as the promotion of interoperability, open systems, public access, compliance with GPEA, end user satisfaction, and IT security.

WHITEHOUSE: CIRCULAR NO. A-130 Revised