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In recent years, there have been several technologies attempting to solve these problems such as Enterprise Applicaton Integration (EAI)* + , Business-to-Business (B2B), Service Oriented Architecture (SOA), and Web Services. These solutions addressed some of the integration problems, but were proprietary, expensive, and time-consuming to implement. These solutions range from expensive vendor solutions (high cost, vendor lock-in) to home-grown custom solutions (high maintenance, high cost). The overwhelming disadvantages of these solutions are high cost and low flexibility due to non-standard implementations.

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