Semantic Similarity in a Taxonomy: An Information-Based Measure and its   Application to Problems of Ambiguity in Natural Language
  This article presents a measure of semantic similarity in an IS-A taxonomy based on the notion of shared information content. Experimental evaluation against a benchmark set of human similarity judgments demonstrates that the measure performs better than the traditional edge-counting approach. The article presents algorithms that take advantage of taxonomic similarity in resolving syntactic and semantic ambiguity, along with experimental results demonstrating their effectiveness. 
P. Resnik
cs.AI