4. A method according to claim 1 , further comprising: determining a classification code for at least one of the uncoded concepts in the at least one cluster, comprising: comparing the at least one uncoded concept to a neighborhood of coded reference concepts in the at least one cluster, wherein the neighborhood comprises a predetermined number of the coded reference concepts that have a closest distance to the uncoded concept; and selecting the classification code based on the comparison of the at least one uncoded concept and the coded reference concept neighborhood.
4. A method according to claim 1 , further comprising: determining a classification code for at least one of the uncoded concepts in the at least one cluster, comprising: comparing the at least one uncoded concept to a neighborhood of coded reference concepts in the at least one cluster, wherein the neighborhood comprises a predetermined number of the coded reference concepts that have a closest distance to the uncoded concept; and selecting the classification code based on the comparison of the at least one uncoded concept and the coded reference concept neighborhood. 8. A method according to claim 4 , further comprising: providing the classification code as the suggestion for classifying the at least one uncoded concept in the at least one cluster.