Query processing system including data classification

A computer program product encoded on a tangible, non-transitory storage medium, the product comprising computer readable instructions for causing one or more processors to perform operations comprising:

• receiving a request for a data set from a client, the request including one or more request parameters indicating one or more characteristics for a result set;
• identifying a set of disjointed classes associated with the data set, the identification based at least in part on the one or more request parameters, the set of classes comprises the entire data set;
• associating the set of classes with a set of class representatives, each class in the set of classes associated with a class representative from the set of class representatives;
• and
• presenting the set of class representatives to the client.

A system, comprising:

• memory for storing data;
• and
• one or more processors operable to:
• receive a request for a data set from a client, the request including one or more request parameters indicating one or more characteristics for a result set;
• identify a set of disjointed classes associated with the data set, the identification based at least in part on the one or more request parameters, the set of classes comprises the entire data set;
• associate the set of classes with a set of class representatives, each class in the set of classes associated with a class representative from the set of class representatives;
• and
• present the set of class representatives to the client.