5. The system of claim 1 wherein generating the respective similarity score includes normalizing at least a portion of the respective second significance magnitude factor as a function of page count of the respective one of the documents with respect to one or more other documents in the documents of the group.
6. The system of claim 5 wherein: the current instance of the search criteria includes a uniform resource locator (URL); and receiving the current instance of search criteria includes accessing information residing at a location designated by the URL, extracting at least a portion of the information that is in a format native to the location designated by the URL and generating search criteria in a text-based format from at least a portion of the identified information in the format native to the location designated by the URL.