18. The apparatus of claim 13 , wherein the plurality of predictive performance measures include at least one of: an F-measure, a weight error rate measure and an area under curve of receiver operations characteristics measure.
13. An apparatus for generating a classifier model, the apparatus comprising: a memory device having executable instructions stored therein; and a processing device, in response to the executable instructions, operative to: define a plurality of predictive performance measures based on a leave one out (LOO) cross validation in terms of selectable model parameters; derive efficient analytical expressions by approximating one or more analytical expressions based on the plurality of predictive performance measures to compute a LOO predictive performance; select a classifier model based on the LOO predictive performance; and classify web content using the selected classifier model.