REINA at the WebCLEF Task: Combining Evidences and Link Analysis

The participation of the REINA Research Group in WebCLEF 2005 is focused in the monolingual mixed task. Queries or topics are of two types: named and home pages. For both, we rst perform a search by thematic contents; for the same query, we do a search in several elements of information from every page (title, some meta tags, text of backlinks) and then we combine the results. For queries about home pages, we try to detect them with a method based in some keywords and their patterns of use. After, a re-rank of the results of the thematic contents retrieval is performed, based on Page-Rank and Centrality coe cients.