9. The system of claim 1 , wherein the operations further comprise: determining an aggregate category match score using the document-categories score and the search criteria-categories score.
9. The system of claim 1 , wherein the operations further comprise: determining an aggregate category match score using the document-categories score and the search criteria-categories score. 10. The system of claim 9 , wherein the operations further comprise: evaluating a dot product of the document-categories score and the search criteria-categories score.