This dataset is a collection of sequences of sets. Stack exchange is a collection of question-and-answer web sites. Users post questions and annotate them with up to 5 tags. In this dataset, each sequence is the time-ordered set of tags applied to questions asked by a user on Mathematics Stack Exchange. All sequences contain at least 10 sets, and only sets of size at most 5 are considered. Some basic statistics of this dataset are:

• number of sequences: 15,726
• number of unique elements appearing in sets: 1,650
• number of sets: 517,810
• number of unique sets: 122,099

Data:

• sos-tags-math-sx.tar.gz

If you use this data, please cite the following paper:

• Sequences of sets.
  Austin R. Benson, Ravi Kumar, and Andrew Tomkins.
  Proceedings of KDD, 2018. [bibtex]