Datasets usually provide raw data for analysis. This raw data often comes in spreadsheet form, but can be any collection of data, on which analysis can be performed.
CitNet Explorer is a citation network visualisation tool developed at Leiden University, available here http://www.citnetexplorer.nl/Home and documented here http://arxiv.org/abs/1404.5322.
In this fileset are some CitNet Explorer compatible files for one of the citation networks we used in our paper 'Transitive Reduction of citation networks', available here - http://arxiv.org/abs/1310.8224.pdf
We will hopefully be adding more information to this fileset (eg. author names) soon, but the current files are enough to start visualising the networks.