[Haskell-cafe] Libraries to compare trees?

[dokondr]

My mistake: need advice on libraries and data types not for trees but for
directed graphs.

On Thu, Oct 27, 2011 at 4:49 PM, dokondr <dokondr at gmail.com> wrote:

> Please advise on Haskell libraries to compare trees in textual
> representation.
> I need to compare both structure and node contents of two trees, find
> similar sub-trees, and need some metric to measure distance between two
> trees.
> Also need advice on simple parser to convert textual tree representation
> into a data type convenient for tree manipulation (comparison, matching,
> etc.) What data type to use for trees with arbitrary structure?
>
> Example trees:
>
> *** Tree 1:
> (ROOT
>   (S
>     (NP (DT The) (NN voice) (NN quality))
>     (VP (VBD was)
>       (ADJP (JJ clear) (RB too)))
>     (. .)))
>
>
> *** Tree 2:
> (ROOT
>   (S
>     (SBAR (IN Although)
>       (S
>         (NP (DT the) (NN battery) (NN life))
>         (VP (VBD was) (RB not)
>           (ADJP (JJ long)))))
>     (, ,)
>     (NP (DT that))
>     (VP (VBZ is)
>       (VP (VBN ok)
>         (PP (IN for)
>           (NP (PRP me)))))
>     (. .)))
>
> Thanks!
> Dmitri
>
>
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