Lots of data, lots of hurdles: Aggregating usage information from distributed Open Access repositories

Abstract

This article reflects the results of the project "Open Access Statistics", which was designed to collect standardized usage figures for scientific documents. The data gathered were primarily intended to provide impact values based on document usage for Open Access documents as these were excluded from databases used to provide citation based impact scores. The project also planned the implementation of more sophisticated procedures such as network analyses, but was confronted with complex legal requirements.