[xquery-talk] String similarity function in XQuery?

David Sewell dsewell at virginia.edu
Fri Jun 15 11:55:18 PDT 2007

Thanks to David and Andrew for the feedback. Jenni T's function looks
like it should be straightforward to convert to XQuery.


On Thu, 14 Jun 2007, David Carlisle wrote:

> > Does anyone have an XQuery function that calculates the similarity of
> > two strings? I'm thinking of something along the lines of the Perl
> > String::Similarity module:
> I think this is a different measure, and written as XSLT rather than
> XQuery, but that's just top level syntax differences as the underlying
> expression language is the same as far as string handling goes.
>  http://www.jenitennison.com/blog/search/node/Levenshtein
> > but (after adding parentheses around the final if..then clause so
> > it will run) this function scales more or less exponentially with string
> > length, becoming unusable pretty quickly.
> The comments in the above posts re helping the system optimise the tail
> recursive calls are probably relevant (in general if not in detail) to
> other algorithms and other systems
> David
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