A Web-Based Kernel Function for Matching Short Text Snippets

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Determining the similarity of short text snippets, such as search queries, works poorly with traditional document similarity measures (e.g., cosine), since there are often few, if any, terms in common between two short text snippets. The authors address this problem by introducing a novel method for measuring the similarity between short text snippets (even those without any overlapping terms) by leveraging web search results to provide greater context for the short texts. In this paper, the authors define such a similarity kernel function and provide examples of its efficacy.