14. The system of claim 8 , wherein the computer processing system is further configured to: count the frequencies of the plurality of property names in the one of the plurality of documents; sum the frequencies of property names to produce a total count in the one of the plurality of documents; and calculate the relevance score for the one of the plurality of documents using the total count.
15. The system of claim 14 , wherein the frequencies of the plurality of property names is counted up to a predetermined upper bound, wherein the relevance score is calculated using a ratio of the total count to the predetermined upper bound, wherein the total count is set to be equal to the predetermined upper bound if the total frequencies of the plurality of property names exceed the predetermined upper bound.