Variants of tree similarity in a question answering task
Martin Emms · 2006
The results of experiments on the application of a variety of distance measures to a question-answering task are reported. Variants of tree-distance are considered, including whole-vs-sub tree, node weighting, wild cards and lexical emphasis. We derive string-distance as a special case of tree-distance and show that a particular parameterisation of tree-distance outperforms the string-distance measure.