5. The method of claim 1 , wherein the processing data further comprises extracting the data, wherein the extracting comprises: parsing the data; downloading documents referred to by links in the data; and extracting one or more mapping attributes and one or more mapping categories from the data.
5. The method of claim 1 , wherein the processing data further comprises extracting the data, wherein the extracting comprises: parsing the data; downloading documents referred to by links in the data; and extracting one or more mapping attributes and one or more mapping categories from the data. 6. The method of claim 5 , wherein the processing further comprises: (a) parsing output from the extracting; (b) for each of the mapping categories extracted: (i) retrieving a corresponding canonical category; (ii) inserting the canonical category into the data; and (iii) if there are any canonical attributes for the mapping category, inserting the canonical attributes into the data.