Global Growth of Open Access Items (2004-2012)

The dataset shows the (average) global growth of open access items (2004-2012) indexed in the Bielefeld Academic Search Engine (BASE). The datasets are presented in csv and xslx. Based on the data a visualization was created and published in LIBREAS. Library Ideas (an Open Access e-only journal). For the citable URN of the visualization see the link.本数据集展示了2004年至2012年间，被比勒费尔德学术搜索引擎（Bielefeld Academic Search Engine, BASE）收录的开放获取（Open Access）文献的（平均）全球增长态势。本数据集以csv和xslx格式提供。基于该数据集制作的可视化作品已发表于《LIBREAS. Library Ideas》（纯电子出版的开放获取期刊）。如需获取该可视化作品的可引用统一资源名称（Uniform Resource Name, URN），请查阅相关链接。