7. The method of claim 6 , wherein determining a measure of similarity between the plurality of social bookmarking tags associated with the web page and the fragment further comprises: obtaining a frequency of use associated with each social bookmarking tag in the plurality of social bookmarking tags; and weighting the similarity score for each of the unique pairs based on the frequency of use associated with each social bookmarking tag in the unique pair.
6. The method of claim 5 , wherein determining a measure of similarity between the plurality of social bookmarking tags associated with the web page and the fragment comprises: organizing the plurality of social bookmarking tags into unique pairs; obtaining related social bookmarking tags associated with each of the unique pairs to generate an expanded set of social bookmarking tags corresponding to each of the unique pairs; determining a measure of similarity between each expanded set of social bookmarking tags and the fragment to generate a similarity score for each of the unique pairs; and multiplying the similarity scores for each of the unique pairs together.