A Schema Feature Based Frequent Pattern Mining Algorithm for Semi-structured Data Stream

Data mining is used to find useful information from massive data. Frequent pattern mining is one important task of data mining. Recently, the researches on frequent pattern mining for semi-structured data have made some progresses, and it also have a lot of focuses for data stream. However, only a few studies focus on both semi-structured data and data stream. This paper proposes an algorithm named SPrefixTreeISpan. We segment the semi-structured data stream first, and then uses the pattern-growth method to mine each segment. In the end, we maintain all the results on a structure called patternTree. At the same time, the mining algorithm is optimized by the inevitable parent-child relationship and the inevitable child-parent relationship extracted from XML schema. Experiment shows that SPrefixTreeISpan has better performance.