Patent classifications
G
PHYSICS
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G06
COMPUTING OR CALCULATING; COUNTING
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G06F
ELECTRIC DIGITAL DATA PROCESSING
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16/00
Information retrieval; Database structures therefor; File system structures therefor
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G06F16/68
Retrieval characterised by using metadata, e.g. metadata not derived from the content or metadata generated manually
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G06F16/686
using information manually generated, e.g. tags, keywords, comments, title or artist information, time, location or usage information, user ratings
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