22. A computer program product as in claim 21 wherein applying the set of predefined transformations from the transformation database to the content from the content source includes: during a content extraction phase in which the content is extracted from the content source, generating (i) first word variants for a first parsed word of the content and (ii) second word variants for a second parsed word of the content.
23. A computer program product as in claim 22 wherein applying the set of predefined transformations from the transformation database to the content from the content source further includes: following the content extraction phase and during a classification phase in which the content is classified to a vocabulary, generating (i) additional first word variants from the first word variants for the first parsed word of the content and (ii) additional second word variants from the second word variants for the second parsed word of the content.