1. A computer-implemented method executed by one or more computing devices for assigning a value index to a user, the method comprising: labeling and storing user registration information in a database as a set of demographic nouns; determining, by at least one of the one or more computing devices, a composite set of taxonomic nouns to characterize the user, by a method comprising: preparing one or more of a set of first taxonomic nouns, a set of second taxonomic nouns, a set of third taxonomic nouns, and a set of fourth taxonomic nouns by: analyzing, by at least one of the one or more computing devices, author-generated classification information regarding at least one document of a set of documents and assigning a set of first taxonomic nouns to characterize the user based upon the author-generated classification information; examining, by at least one of the one or more computing devices, a user-generated tag from a client computer and characterizing the user of at least one document of the set of documents and assigning a set of second taxonomic nouns to characterize the user based upon the user-generated tag characterization; identifying, by at least one of the one or more computing devices, a method by which the user accessed at least one document of the set of documents from a content provider and assigning a set of third taxonomic nouns to characterize the user based upon the method of access; and evaluating, by at least one of the one or more computing devices, attributes that are related to the method of access and assigning a set of fourth taxonomic nouns to characterize the user based upon the attributes related to the method of access; preparing, by at least one of the one or more computing devices, a set of fifth taxonomic nouns by processing at least one document of the set of documents upon a predetermined pattern rule to characterize the user; and aggregating, by at least one of the one or more computing devices, at least one of the one or more prepared sets of taxonomic nouns with the set of fifth taxonomic nouns into the composite set of taxonomic nouns; and assigning, by at least one of the one or more computing devices, a value index to the user based on at least in part on the demographic nouns, the composite set of taxonomic nouns, and a user profile of at least one other user.