A similarity between probabilistic tree languages: application to XML document families

摘要

We describe a general approach to compute a similarity measure between distributions generated by probabilistic tree automata that may be used in a number of applications in the pattern recognition field. In particular, we show how this similarity can be computed for families of structured (XML) documents. In such case, the use of regular expressions to specify the right part of the expansion rules adds some complexity to the task. (C) 2003 Pattern Recognition Society. Published by Elsevier Science Ltd. All rights reserved. [References: 5]