Customer information might be stored in a customer master data management system, or multiple repositories, and creditcard transactions might be stored in another data source.
客户信息可能存储在客户主数据管理系统或多个存储库中，而信用卡事务则可能存储在另一个数据源中。
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The following case study illustrates how you could integrate and reuse existing applications using an SOA approach to handle the middleware operations of a creditcard payment system.