This software is designed for generating IP label for graph reachability query. Please refer to our paper "Reachability Querying: An Independent Permutation Labeling Approach" for more details (http://www.vldb.org/pvldb/vol7/p1191-wei.pdf).

Please cite our paper if the software is used for research works.
@article{DBLP:journals/pvldb/WeiYLJ14,
  author    = {Hao Wei and
               Jeffrey Xu Yu and
               Can Lu and
               Ruoming Jin},
  title     = {Reachability Querying: An Independent Permutation Labeling Approach},
  journal   = {{PVLDB}},
  volume    = {7},
  number    = {12},
  pages     = {1191--1202},
  year      = {2014},
}

If you have any further questions, feel free to contact me via email, weihaohal@gmail.com. My homepage is http://www1.se.cuhk.edu.hk/~hwei.