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Abstract

Disclosed is a data selection mechanism for identifying a single data item from a plurality of data items, each data item having an associated plurality of related descriptors each having an asscoiated descriptor value. The data selection mechanism comprises a pattern matching mechanism for identifying candidate matching descriptor values that correspond to user-generated input, and a filter mechanism for providing a filtered data set comprising the single data item. The pattern matching mechanism is operable to apply one or more pattern recognition models to first user-generated intpu to generate one or more hypothesised descriptor values for each of the one or more pattern recognition models. The filter mechanism is operable to: 9) create a data filter from the hypothesised descriptor values produced by the one or more pattern recognition models to apply to the plurality of data items to produce a filtered data set of candidate data items; and ii) select one or more subsequent pattern recognition modesl for applying to further user-generated input.

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