G
PHYSICS
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G06
COMPUTING; CALCULATING OR COUNTING
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G06F
ELECTRIC DIGITAL DATA PROCESSING
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G06F16/00
Information retrieval; Database structures therefor; File system structures therefor
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G06F16/20
of structured data, e.g. relational data
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G06F16/24
Querying
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G06F16/242
Query formulation
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G06F16/2425
Iterative querying; Query formulation based on the results of a preceding query
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