Abstract
We propose a method to automatically train lemmatization rules that handle prefix, infix and suffix changes to generate the lemma from the full form of a word. We explain how the lemmatization rules are created and how the lemmatizer works. We trained this lemmatizer on Danish, Dutch, English, German, Greek, Icelandic, Norwegian, Polish, Slovene and
Swedish full form-lemma pairs respectively.
We obtained significant improvements of 24 percent for Polish, 2.3 percent for Dutch, 1.5 percent for English, 1.2 percent for German and 1.0 percent for Swedish compared to plain suffix lemmatization using a suffix-only lemmatizer.
Icelandic deteriorated with 1.9 percent. We also made an observation regarding the number of produced lemmatization rules as a function of the number of training pairs.
Swedish full form-lemma pairs respectively.
We obtained significant improvements of 24 percent for Polish, 2.3 percent for Dutch, 1.5 percent for English, 1.2 percent for German and 1.0 percent for Swedish compared to plain suffix lemmatization using a suffix-only lemmatizer.
Icelandic deteriorated with 1.9 percent. We also made an observation regarding the number of produced lemmatization rules as a function of the number of training pairs.
Originalsprog | Engelsk |
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Titel | Proceedings of the Joint Conference of the 47th Annual Meeting of the ACL and the 4th International Joint Conference on Natural Language Processing of the AFNLP |
Antal sider | 9 |
Vol/bind | 1 |
Forlag | Association for Computational Linguistics |
Publikationsdato | 2009 |
Sider | 145-153 |
ISBN (Trykt) | 978-1-932432-61-9 |
ISBN (Elektronisk) | 1-932432-61-2 |
Status | Udgivet - 2009 |
Begivenhed | ACL-IJCNLP 2009 - Singapore, Singapore Varighed: 2 aug. 2009 → 7 aug. 2009 Konferencens nummer: 47 |
Konference
Konference | ACL-IJCNLP 2009 |
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Nummer | 47 |
Land/Område | Singapore |
By | Singapore |
Periode | 02/08/2009 → 07/08/2009 |
Emneord
- Det Humanistiske Fakultet
- lemmatisering morfologi affiks