--- title: "Joint Prediction of Morphosyntactic Categories — Inoue 2017" description: "A fine-grained Arabic POS tag is a conjunction of values in up to 14 morphosyntactic categories (gender, case, mood, proclitics, enclitic and others), so…" authors: ["Go Inoue", "Hiroyuki Shindo", "Yuji Matsumoto"] year: 2017 venue: "Proceedings of the 21st Conference on Computational Natural Language Learning (CoNLL 2017)" source: "https://aclanthology.org/K17-1042/" doi: "10.18653/v1/k17-1042" licence: "CC BY 4.0 (ACL Anthology)" licence_url: "https://creativecommons.org/licenses/by/4.0/" summary_licence: "Elamur Cosmic License" canonical: "https://research.elamur.ai/free/en/papers/lingbulk-2017-inoue-joint-prediction-morphosyntactic-categories-fine/" --- [Elamur Research](https://md.research.elamur.ai/free/en/) · [this page in HTML](https://research.elamur.ai/free/en/papers/lingbulk-2017-inoue-joint-prediction-morphosyntactic-categories-fine/) [home](https://md.research.elamur.ai/free/en/) / [papers](https://md.research.elamur.ai/free/en/papers/) / [2017](https://md.research.elamur.ai/free/en/papers/2017/page/2/) / Joint Prediction of Morphosyntactic Categories for Fine-Grained Arabic Part-of-Speech Tagging Exploiting Tag Dictionary Information # Joint Prediction of Morphosyntactic Categories for Fine-Grained Arabic Part-of-Speech Tagging Exploiting Tag Dictionary Information **Authors:** [Go Inoue](https://md.research.elamur.ai/free/en/authors/go-inoue/); [Hiroyuki Shindo](https://md.research.elamur.ai/free/en/authors/hiroyuki-shindo/); [Yuji Matsumoto](https://md.research.elamur.ai/free/en/authors/yuji-matsumoto/) · **Year:** 2017 · **Venue:** Proceedings of the 21st Conference on Computational Natural Language Learning (CoNLL 2017), pp. 421–431 **Link:** [aclanthology.org/K17-1042](https://aclanthology.org/K17-1042/) · library `lingbulk-2017-inoue-joint-prediction-morphosyntactic-categories-fine` · **Licence:** [CC BY 4.0](https://creativecommons.org/licenses/by/4.0/) (ACL Anthology) [**21** citations](https://openalex.org/works?filter=cites:W2740144049) OpenAlex · 2026-10-14 · [**18** citations in our library](https://md.research.elamur.ai/free/en/papers/lingbulk-2017-inoue-joint-prediction-morphosyntactic-categories-fine/cited-by/) of the 140673 papers whose bibliographies we read · [Proceedings of the 21st Conference on Computational Natural Language Learning (CoNLL 2017)](https://aclanthology.org/volumes/K17-1/) · [licence](https://creativecommons.org/licenses/by/4.0/) - [Publisher's page](https://aclanthology.org/K17-1042/) - [PDF](https://aclanthology.org/K17-1042.pdf) - [DOI 10.18653/v1/k17-1042](https://doi.org/10.18653/v1/k17-1042) - [OpenAlex](https://openalex.org/W2740144049) **Authors (3)** 1. Go Inoue [Semantic Scholar](https://www.semanticscholar.org/author/46915471) 2. [Hiroyuki Shindo](https://openalex.org/A5063398043) [ORCID](https://orcid.org/0000-0003-1081-9194) · [Semantic Scholar](https://www.semanticscholar.org/author/73467110) · h 21 · 2241 citations · 105 works 3. [Yuji Matsumoto](https://openalex.org/A5072032804) [ORCID](https://orcid.org/0000-0003-4946-9574) · [Semantic Scholar](https://www.semanticscholar.org/author/1681502) · h 46 · 12113 citations · 591 works Citations and author metrics: OpenAlex, 2026-10-14; authors with the same name are not always told apart. ## What it is about A fine-grained Arabic POS tag is a conjunction of values in up to 14 morphosyntactic categories (gender, case, mood, proclitics, enclitic and others), so the number of possible tags is very large. The authors train bi-LSTM taggers, first one model per category, then a joint multi-task model with shared hidden layers. They also add tag-dictionary information as a soft feature: for each word and category, the sum of embeddings of the tags an analyzer allows, instead of a hard filter. On the Penn Arabic Treebank the full-tag accuracy is 87.74 for independent models, 90.17 with the dictionary, 89.49 for the joint model and 91.38 for the joint model with the dictionary. That is 2.11 points above CamelParser (89.27). The same architecture is run on the Arabic UD treebank with 17 categories. The authors note that a hard analyzer constraint cannot recover a tag the analyzer did not return. ## Ideas - I1. Use the lexicon as a soft feature in the `tools/hbo` gparse input: for each token, the set of values per FEATS category that the lexicon allows (the dictionary builder), added as a feature and never as a filter. A word with no entry gets an empty set, so the right analysis can still win. Where: `tools/hbo`, described in [languages/hbo/13-mova-tools.md](https://mova.elamur.ai/free/en/docs/languages/hbo/13-mova-tools/). - I2. Report per-category accuracy and whole-analysis accuracy together, as the paper's tables do, on `treebanks/hbo/ptnk` and `treebanks/he/`. A gain in gender must not hide a loss in case; a gain is claimed only after two identical runs. - I3. Use the per-category table as an error template for `tools/hbo`: which features are easy (clitics, prefixes) and which are hard (case, mood), and the share of errors that come from a missing candidate in the lexicon, which the paper reports as a large part of its baseline errors. ## For Mova I1 and I3 go into `tools/hbo` (the feature input and its error analysis). I2 is the evaluation for `treebanks/hbo/ptnk` and `treebanks/he/`. Case-related checks belong to [languages/hbo/04-noun.md](https://mova.elamur.ai/free/en/docs/languages/hbo/04-noun/). Topics: [Treebanks](https://md.research.elamur.ai/free/en/topics/treebanks/) · [Part-of-speech tagging](https://md.research.elamur.ai/free/en/topics/part-of-speech-tagging/) ## Cite The paper itself, not this card. BibTeX from the library's record of the work. [DOI 10.18653/v1/k17-1042](https://doi.org/10.18653/v1/k17-1042) ```bibtex @inproceedings{inoue2017joint, title = {{Joint Prediction of Morphosyntactic Categories for Fine-Grained Arabic Part-of-Speech Tagging Exploiting Tag Dictionary Information}}, author = {Inoue, Go and Shindo, Hiroyuki and Matsumoto, Yuji}, booktitle = {Proceedings of the 21st Conference on Computational Natural Language Learning (CoNLL 2017)}, year = {2017}, doi = {10.18653/v1/k17-1042}, url = {https://doi.org/10.18653/v1/k17-1042} } ``` - [← previous Integrating syntactic theory and variationist analysis: The structure of negative indefinites in regional dialects of British English](https://md.research.elamur.ai/free/en/papers/childs-2017-integrating-syntactic-theory-variationist-analysis/) - [next → Joint Syntacto-Discourse Parsing and the Syntacto-Discourse Treebank](https://md.research.elamur.ai/free/en/papers/zhao-2017-joint-syntacto-discourse-parsing-syntacto/) - [↑ back to papers of 2017](https://md.research.elamur.ai/free/en/papers/2017/page/2/) ## References 3 references, 0 of them with a card of ours. ↗ leads to the work, «find» searches for one we have no id for yet. 1. Joachim Bingel and Anders Søgaard. 2017. Identifying beneficial task relations for multi-task learning in deep neural networks. In Proceedings of the 15th Conference of the European Chapter of the Association for Computational Linguistics: Volume 2, Short Papers. Association for Computational Linguistics, Valencia, Spain, pages 164–169. http://www.aclweb.org/anthology/E17-2026. [↗](https://aclanthology.org/E17-2026/) 2. Bernd Bohnet, Joakim Nivre, Igor Boguslavsky, Richárd Farkas, Filip Ginter, and Jan Hajič. 2013. Joint Morphological and Syntactic Analysis for Richly Inflected Languages. Transactions of the Association for Computational Linguistics 1:415–428. [↗](https://doi.org/10.1162/tacl_a_00238) 3. Tim Buckwalter. 2002. Buckwalter Arabic Morphological Analyzer Version 1.0 LDC2002L49. Linguistic Data Consortium (LDC, Philadelphia US). [find](https://scholar.google.com/scholar?q=Tim+Buckwalter%2E+2002%2E+Buckwalter+Arabic+Morphological+Analyzer+Version+1%2E0+LDC2002L49%2E+Linguistic+Data+Consortium+%28LDC%2C+Philadelphia+US%29%2E)