A graph generation software package
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Authoritative sources in a hyperlinked environment
Journal of the ACM (JACM)
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VLDB '90 Proceedings of the 16th International Conference on Very Large Data Bases
Reachability and Distance Queries via 2-Hop Labels
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The maximum edge biclique problem is NP-complete
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A Prime Number Labeling Scheme for Dynamic Ordered XML Trees
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ACM Transactions on Database Systems (TODS) - Special Issue: SIGMOD/PODS 2004
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ACM Transactions on Database Systems (TODS)
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Proceedings of the 2007 ACM SIGMOD international conference on Management of data
Fg-index: towards verification-free query processing on graph databases
Proceedings of the 2007 ACM SIGMOD international conference on Management of data
Fast computing reachability labelings for large graphs with high compression rate
EDBT '08 Proceedings of the 11th international conference on Extending database technology: Advances in database technology
Fast reachability query processing
DASFAA'06 Proceedings of the 11th international conference on Database Systems for Advanced Applications
Adapting prime number labeling scheme for directed acyclic graphs
DASFAA'06 Proceedings of the 11th international conference on Database Systems for Advanced Applications
Fast computation of reachability labeling for large graphs
EDBT'06 Proceedings of the 10th international conference on Advances in Database Technology
On-line exact shortest distance query processing
Proceedings of the 12th International Conference on Extending Database Technology: Advances in Database Technology
GRAIL: scalable reachability index for large graphs
Proceedings of the VLDB Endowment
I/O cost minimization: reachability queries processing over massive graphs
Proceedings of the 15th International Conference on Extending Database Technology
K-reach: who is in your small world
Proceedings of the VLDB Endowment
TF-Label: a topological-folding labeling scheme for reachability querying in a large graph
Proceedings of the 2013 ACM SIGMOD International Conference on Management of Data
Computing weight constraint reachability in large networks
The VLDB Journal — The International Journal on Very Large Data Bases
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Recent interests on XML, Semantic Web, and Web ontology, among other topics, have sparked a renewed interest on graph-structured databases. A fundamental query on graphs is the reachability test of nodes. Recently, 2-hop labeling has been proposed to index large collections of XML and/or graphs for efficient reachability tests. However, there has been few work on updates of 2-hop labeling. This is compounded by the fact that Web data changes over time. In response to these, this paper studies the incremental maintenance of 2-hop labeling. We identify the main reason for the inefficiency of updates of existing 2-hop labels. We propose two updatable 2-hop labelings, hybrids of 2-hop labeling, and their incremental maintenance algorithms. The proposed 2-hop labeling is derived from graph connectivities, as opposed to set cover which is used by all previous work. Our experimental evaluation illustrates the space efficiency and update performance of various kinds of 2-hop labeling. The main conclusion is that there is a natural way to spare some index size for update performance in 2-hop labeling.