This part is composed of the type starting from the origin s, the end point t type end length is between the shortest length l and the shortest k-step path limiting the maximum length l-k, that is, the effective solution space, this solution space is much smaller than the size of the heterogeneic information network, so we can use this solution space contains local network mode instead of the original network mode, so as to solve the problem raised in the previous.<br><br>Based on this, the data structure of k-step hierarchical pattern graph is designed in this paper to replace the network pattern in the heterogeneic information network of rich pattern.
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