| Impedance Mismatch |
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| Relational
databases |
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| • | fields |
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| • | records |
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| • | tables |
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| General-purpose |
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| programming
languages |
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| • | standard data types |
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| • | classes |
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| The
problem is to bind: |
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| • | relational fields, records and tables |
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| • | native 4GL variables, arrays and classes |
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