Abstract
This paper considers the problem of computing a constrained edit distance between unordered labeled trees. The problem of approximate unordered tree matching is also considered. We present dynamic programming algorithms solving these problems in sequential timeO(|T1|×|T2|×(deg(T1)+deg(T2))× log2(deg(T1)+deg(T2))). Our previous result shows that computing the edit distance between unordered labeled trees is NP-complete.
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