Evaluating and Extending the Coverage of HPSG Grammars: A Case Study for German

Jeremy Nicholson; Valia Kordoni; Yi Zhang; Timothy Baldwin; Rebecca Dridan

Evaluating and Extending the Coverage of HPSG Grammars: A Case Study for German

Jeremy Nicholson, Valia Kordoni, Yi Zhang, Timothy Baldwin, Rebecca Dridan

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Abstract

In this work, we examine and attempt to extend the coverage of a German HPSG grammar. We use the grammar to parse a corpus of newspaper text and evaluate the proportion of sentences which have a correct attested parse, and analyse the cause of errors in terms of lexical or constructional gaps which prevent parsing. Then, using a maximum entropy model, we evaluate prediction of lexical types in the HPSG type hierarchy for unseen lexemes. By automatically adding entries to the lexicon, we observe that we can increase coverage without substantially decreasing precision.

Anthology ID:: L08-1025
Volume:: Proceedings of the Sixth International Conference on Language Resources and Evaluation (LREC'08)
Month:: May
Year:: 2008
Address:: Marrakech, Morocco
Editors:: Nicoletta Calzolari, Khalid Choukri, Bente Maegaard, Joseph Mariani, Jan Odijk, Stelios Piperidis, Daniel Tapias
Venue:: LREC
SIG:
Publisher:: European Language Resources Association (ELRA)
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Pages:
Language:
URL:: http://www.lrec-conf.org/proceedings/lrec2008/pdf/794_paper.pdf
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Cite (ACL):: Jeremy Nicholson, Valia Kordoni, Yi Zhang, Timothy Baldwin, and Rebecca Dridan. 2008. Evaluating and Extending the Coverage of HPSG Grammars: A Case Study for German. In Proceedings of the Sixth International Conference on Language Resources and Evaluation (LREC'08), Marrakech, Morocco. European Language Resources Association (ELRA).
Cite (Informal):: Evaluating and Extending the Coverage of HPSG Grammars: A Case Study for German (Nicholson et al., LREC 2008)
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PDF:: http://www.lrec-conf.org/proceedings/lrec2008/pdf/794_paper.pdf

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@inproceedings{nicholson-etal-2008-evaluating,
    title = "Evaluating and Extending the Coverage of {HPSG} Grammars: A Case Study for {G}erman",
    author = "Nicholson, Jeremy  and
      Kordoni, Valia  and
      Zhang, Yi  and
      Baldwin, Timothy  and
      Dridan, Rebecca",
    editor = "Calzolari, Nicoletta  and
      Choukri, Khalid  and
      Maegaard, Bente  and
      Mariani, Joseph  and
      Odijk, Jan  and
      Piperidis, Stelios  and
      Tapias, Daniel",
    booktitle = "Proceedings of the Sixth International Conference on Language Resources and Evaluation ({LREC}'08)",
    month = may,
    year = "2008",
    address = "Marrakech, Morocco",
    publisher = "European Language Resources Association (ELRA)",
    url = "https://aclanthology.org/L08-1025/",
    abstract = "In this work, we examine and attempt to extend the coverage of a German HPSG grammar. We use the grammar to parse a corpus of newspaper text and evaluate the proportion of sentences which have a correct attested parse, and analyse the cause of errors in terms of lexical or constructional gaps which prevent parsing. Then, using a maximum entropy model, we evaluate prediction of lexical types in the HPSG type hierarchy for unseen lexemes. By automatically adding entries to the lexicon, we observe that we can increase coverage without substantially decreasing precision."
}

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%0 Conference Proceedings
%T Evaluating and Extending the Coverage of HPSG Grammars: A Case Study for German
%A Nicholson, Jeremy
%A Kordoni, Valia
%A Zhang, Yi
%A Baldwin, Timothy
%A Dridan, Rebecca
%Y Calzolari, Nicoletta
%Y Choukri, Khalid
%Y Maegaard, Bente
%Y Mariani, Joseph
%Y Odijk, Jan
%Y Piperidis, Stelios
%Y Tapias, Daniel
%S Proceedings of the Sixth International Conference on Language Resources and Evaluation (LREC’08)
%D 2008
%8 May
%I European Language Resources Association (ELRA)
%C Marrakech, Morocco
%F nicholson-etal-2008-evaluating
%X In this work, we examine and attempt to extend the coverage of a German HPSG grammar. We use the grammar to parse a corpus of newspaper text and evaluate the proportion of sentences which have a correct attested parse, and analyse the cause of errors in terms of lexical or constructional gaps which prevent parsing. Then, using a maximum entropy model, we evaluate prediction of lexical types in the HPSG type hierarchy for unseen lexemes. By automatically adding entries to the lexicon, we observe that we can increase coverage without substantially decreasing precision.
%U https://aclanthology.org/L08-1025/

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Markdown (Informal)

[Evaluating and Extending the Coverage of HPSG Grammars: A Case Study for German](https://aclanthology.org/L08-1025/) (Nicholson et al., LREC 2008)

Evaluating and Extending the Coverage of HPSG Grammars: A Case Study for German (Nicholson et al., LREC 2008)

ACL

Jeremy Nicholson, Valia Kordoni, Yi Zhang, Timothy Baldwin, and Rebecca Dridan. 2008. Evaluating and Extending the Coverage of HPSG Grammars: A Case Study for German. In Proceedings of the Sixth International Conference on Language Resources and Evaluation (LREC'08), Marrakech, Morocco. European Language Resources Association (ELRA).