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Most enterprises have applications and databases deployed on mainframes. These systems have proved to be very reliable and scalable platforms for handling large amounts of data and transactions. The huge amount of investment needed to re-architect and re-build these systems may not be justified for most enterprises Only minor changes necessary to integrate them with the newer applications need be carried out. Depending on the implementation technology of the mainframe system and the degree to which the Object Oriented principles have been employed during its design, program or data levels. Each of these approaches has both positives and negatives, and based on a situation the most appropriate approach should be adopted. Integration along with the principles of SOA enables enterprises to service-enable the mainframe systems.
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