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author_ss:"Heckner, M."
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classification_ss:"ST 515 (BVB)"
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classification_ss:"025.04 / DDC22ger"
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year_i:[2000 TO 2010}
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Heckner, M.: Tagging, rating, posting : studying forms of user contribution for web-based information management and information retrieval (2009)
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1.0 = *:*, product of: 1.0 = boost 1.0 = queryNorm