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Legacy

Systems Compatibility

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Interoperability

Integrated software and Processing solutions for Business


Interaction between new and older applications is commonly required: integration of legacy components.


Legacy application = application logic + validating code

System evolution


Knowledge towards available frameworks that can provide means to access functionality is crucial.

Example; converting COBOL to J2EE development framework while keeping the same Logic.


New application = application logic


Mitigating the need to deal with legacy systems


We write early systems business, finance, and administrative systems in COBOL: Common Business-Oriented Language.

No one approach to addressing legacy issues is right for all companies. Some companies might do well to adopt a combination of strategies.

Implicit Construct: a structure/constraint that has not been declared in the database, but which is controlled by the legacy application code.

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