Although the number of ambiguous or inconsistent tags is not very large, these do nevertheless represent the most obvious problem to search and retrieval in folksonomies. The results are presented in comparative tables, giving special attention to related tags within each retrieved document. We identified the difficulties caused by free tagging and some of the folksonomy solutions that have been found to solve them. Our query was made by "Legal History" and by the synonyms "Law History" and "History of Law." We then examined the relevance, consistency and precision of the tags attached to the retrieved documents, in addition to their lexical composition. We presented a case study that combines quantitative and qualitative elements, singularized by the lexical and functional framework. The behaviour and lexical quality of the folksonomies is examined by comparing two online social networks: LibraryThing (for books) and Flickr (for photos).
Our work offers insights into policies to improve information organization and retrieval in online communities. To provide qualitative evidence supporting our hypothesis, we present a statistical model of tagging that demonstrates how novelty and diversity lead to greater tag efficiency in the long run. To explain this observation, we hypothesize that limiting the number of tags fosters novelty and diversity in tag usage, two properties which are both beneficial for tagging efficiency. We observe that tagging efficiency stabilizes over time, while tag content and descriptiveness both increase. In this work, we use information-theoretic measures to track the descriptive and retrieval efficiency of tags on Stack Overflow, a question-answering system that strictly limits the number of tags users can specify per question.
However, previous works did not answer how or even whether community managers can improve the efficiency of tags. Researchers found that the efficiency of tagging systems steadily decreases over time, because tags become less precise in identifying specific documents, i.e., they lose their descriptiveness. Tagging facilitates information retrieval in social media and other online communities by allowing users to organize and describe online content.
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