1. A method for displaying relationships between concepts to provide classification suggestions via injection, comprising: designating a reference set comprising concepts each associated with a classification code; designating clusters of uncoded concepts; comparing one or more of the uncoded concepts from at least one cluster to the reference set; identifying at least one of the concepts in the reference set that is similar to the one or more uncoded concepts; injecting the similar concepts into the at least one cluster; and visually depicting relationships between the uncoded concepts and the similar concepts in the at least one cluster as suggestions for classifying the uncoded concepts.