1. Department of Computer Science & Engineering, University of Washington, Xml data repository, 2002, in 〈http://www.cs.washington.edu/research/xmldatasets〉.
2. Efficient substructure discovery from large semi-structure data;Asai,2002
3. Frequent subgraph discovery;Kuramochi,2001
4. Treefinder, a first step towards XML data mining;Termier,2002
5. gspan: graph-based substructure pattern mining;Yan,2002