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- W2810839169 abstract "The goal of federated search is to combine results from multiple knowledge bases into a single, aggregated result list with items typically ranging from textual documents to images. These knowledge bases are also termed sources, and the process of choosing the actual subset of sources for a given query is referred to as source selection. Uncooperative setting is a scenario under which these sources do not provide information about their content in a standardized way. In our work we focus on knowledge bases with long-tail content i.e., rather specialized sources offering few relevant documents. Such sources are often neglected in favor of more popular ones, both by today's Web users and by most of the existing source selection techniques. We propose a system for source selection which i) could be utilized to automatically detect long-tail knowledge bases and ii) generates aggregated search results that tend to incorporate results of long-tail sources. Based on the current state-of-the-art, we developed components that allowed to adjust the contribution from long-tail sources. Our evaluation is conducted using the TREC 2014 Federated WebSearch dataset. Since this dataset also favors the most popular sources, systems that include many long-tail knowledge bases will yield low performance. To that end we propose a system with only a few relevant long-tail sources integrated into the list of more popular knowledge bases. Additionally, we evaluated the implications of an uncooperative setting, in which only minimal information about the sources is available to the federated search system. With this regard, a severe drop in performance is observed when the share of long-tail sources is higher than 40%. Our work is intended to steer the development of federated search systems, increasing the diversity and coverage of the aggregated search result." @default.
- W2810839169 created "2018-07-10" @default.
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- W2810839169 date "2018-04-09" @default.
- W2810839169 modified "2023-09-25" @default.
- W2810839169 title "Source selection of long tail sources for federated search in an uncooperative setting" @default.
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- W2810839169 doi "https://doi.org/10.1145/3167132.3167212" @default.
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