[Corpora-List] Planarity in dependency parsing

Jason Baldridge jbaldrid at mail.utexas.edu
Fri Apr 27 20:45:00 CEST 2007

Hi Shailly,

There are non-projective approaches to dependency parsing, one of the more
recent of which is McDonald's MSTParser. You can find information here:


The parser itself can be downloaded from:


You might also look at Nivre's MaltParser, which is "pseudo-projective":


As well as other resources available at the web page for this year's CoNLL
shared task on dependency parsing:


Many languages with non-projective dependencies are represented in the data


On 4/27/07, Shailly Goyal <shaillygoyal at gmail.com> wrote:


> Hi all,


> Although my doubt does not exactly suit in this mailing list, I would like

> to know why planarity (projectivity) is required for dependency parsing?

> Many sentences of languages such as German, Hindi are not planar. Does this

> mean that dependency based parsing is not suitable for these languages?


> Thanks in advance.


> Regards,

> Shailly




> --

> =======================

> Ms. Shailly Goyal

> Research Scholar

> Department of Mathematics

> IIT Delhi, New Delhi - 110016

> India.

> Ph. no.: +91 9899400393

> =======================


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