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Current Information Retrieval systems use inverted index structures for efficient query processing. Due to the extremely large size of many data sets, these index structures are usually kept in compressed form, and many techniques for optimizing compressed size and query processing speed have been proposed. In this paper, we focus on versioned document collections, that is, collections where each document is modified over time, resulting in multiple versions of the document. Consecutivedoi:10.1145/1871437.1871594 dblp:conf/cikm/HeZS10 fatcat:y235jx3vhvhhdctoinczlxuu2i