Supertagging the long tail with tree-structured decoding of complex categories
- Although current CCG supertaggers achieve high accuracy on the standard WSJ test set, few systems make use of the categories’ internal structure that will drive the syntactic derivation during parsing. The tagset is traditionally truncated, discarding the many rare and complex category types in the long tail. However, supertags are themselves trees. Rather than give up on rare tags, we investigate constructive models that account for their internal structure, including novel methods for tree-structured prediction. Our best tagger is capable of recovering a sizeable fraction of the long-tail supertags and even generates CCG categories that have never been seen in training, while approximating the prior state of the art in overall tag accuracy with fewer parameters. We further investigate how well different approaches generalize to out-of-domain evaluation sets.
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| Author: | Jakob PrangeGND, Nathan Schneider, Vivek Srikumar |
|---|---|
| URN: | urn:nbn:de:bvb:384-opus4-1178314 |
| Frontdoor URL | https://opus.bibliothek.uni-augsburg.de/opus4/117831 |
| ISSN: | 2307-387XOPAC |
| Parent Title (English): | Transactions of the Association for Computational Linguistics |
| Publisher: | MIT Press |
| Place of publication: | Cambridge, MA |
| Type: | Article |
| Language: | English |
| Year of first Publication: | 2021 |
| Publishing Institution: | Universität Augsburg |
| Release Date: | 2025/01/07 |
| Volume: | 9 |
| First Page: | 243 |
| Last Page: | 260 |
| DOI: | https://doi.org/10.1162/tacl_a_00364 |
| Institutes: | Fakultät für Angewandte Informatik |
| Fakultät für Angewandte Informatik / Institut für Informatik | |
| Fakultät für Angewandte Informatik / Institut für Informatik / Lehrstuhl für Computerlinguistik | |
| Dewey Decimal Classification: | 0 Informatik, Informationswissenschaft, allgemeine Werke / 00 Informatik, Wissen, Systeme / 004 Datenverarbeitung; Informatik |
| Licence (German): |  CC-BY 4.0: Creative Commons: Namensnennung (mit Print on Demand) |
