The ParMol package for frequent subgraph mining. Mining for frequent subgraphs in a graph database has become a popular topic in the last years. Algorithms to solve this problem are used in chemoinformatics to find common molecular fragments in a database of molecules represented as two-dimensional graphs. However, the search process in a rbitrary graph structures includes costly graph and subgraph isomorphism tests . In our ParMol package we have implemented four of the most popular frequent subgraph miners using a common infrastructure: MoFa, gSpan, FFSM, and Gaston. Besides the pure reimplementation, we have added additional functionality to some of the algorithms like parallel search, mining directed graphs, and mining in one big graph instead of a graph database. Also a 2D-visualizer for molecules has been integrated

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  1. Takigawa, Ichigaku; Mamitsuka, Hiroshi: Efficiently mining $\delta $-tolerance closed frequent subgraphs (2011)