Dataset: SocialBM0311

SocialBM0311 is a large-scale social tagging/bookmarking dataset collected from It contains the complete bookmarking activity for almost 2 million users from the launch of the social bookmarking website in 2003 to the end of March 2011. The dataset contains:


The files contain one bookmark per line, with the following fields separated by tabs:

url_md5   user_id   url   unix_timestamp   tags


Legal Information

By downloading and using this dataset you acknowledge that:


Please, cite the following paper if you make use of this dataset for your research work:

Arkaitz Zubiaga, Victor Fresno, Raquel Martinez, Alberto Perez Garcia-Plaza,
Harnessing Folksonomies to Produce a Social Classification of Resources,
IEEE Transactions on Knowledge and Data Engineering, vol. 25, no. 8, pp. 1801-1813, Aug. 2013, doi:10.1109/TKDE.2012.115



The dataset (42 GB after decompressing) is provided in 2 different compression formats (download just one, they both contain the same file!):