Webometrics Ranking of World Universities, an initiative of the des Consejo Superior de Investigaciones Científicas (CSIC), one of the largest research organisations in Spain, publishes regular updates of its ranking of world repositories. The purpose of the ranking is to support initiatives in the field of Open Access and therefore to promote free access to scientific and scholarly information. The ranking serves as an indicator of the visibility and impact of scientific repositories. Details of the criteria on which the evaluation is based can be found under Methodology beschrieben.
The January 2009 update features six German document servers in the top fifty repositories. Moreover, Germany now has 27 repositories in the Top 300.