Aktualität als erfolgskritischer Faktor bei Suchmaschinen [Up-to-dateness as a ranking factor in Web search engines]

Up-to-dateness is an important factor for Web search engines in different aspects. Firstly, the web page index should be up to date, secondly, the use of date-restricted queries should be supported, and last but not least up-to-dateness is an important ranking factor. This article discusses the research findings in all three areas. The im-portance of the mentioned factors is stressed and it is shown that they are key for ranking web documents. Their importance will even increase with the age of the WWW