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In 2001, the term Service-Oriented Architecture (SOA) never came up. None of the applications or Enterprise Resource Planning (ERP) systems involved had an open interface, although Siebel’s Enterprise Application Integration (EAI) Application Program Interface (API) was probably one of the first. The world was dominated by thoughts of EAI technologies and the players. Web services were non-existent. Failures in integration messages, often sent over Common Object Request Broker Architecture (CORBA), were rampant, but by then, the consultants were long gone. The systems tended to degrade over time. Like a cancer, as more data inconsistencies crept into the system, more integration calls would fail, generating more inconsistencies. While certain products had a simple ID linking system to join application user IDs, integrated enterprise data repositories were a new concept. Cooperative applications were science fiction. Each system had its own cryptic APIs and databases to deal with. There was a lot of database code to try to stitch together all the differences. …

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