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For users who are not familiar with the text domain, the absence of diacritics within text has been known to cause mild to serious readability and comprehension problems. However, the absence of diacritics in text causes near-intractable problems for natural language processing systems. This situation has led to extensive research on diacritization. Several techniques have been applied to address diacritic restoration (or diacritization) but the existing surveys of techniques have been restricted to some languages and hence left gaps for practitioners to fill. Our survey examined diacritization from the angle of resources deployed and various formulation employed for diacritization. It was concluded by recommending that (a) any proposed technique for diacritization should consider the language features and the purpose served by diacritics, (b) that evaluation metrics needed to be more rigorously defined for easy comparison of performance of models.<\/jats:p>","DOI":"10.1017\/s1351324917000407","type":"journal-article","created":{"date-parts":[[2017,11,20]],"date-time":"2017-11-20T04:32:54Z","timestamp":1511152374000},"page":"123-154","source":"Crossref","is-referenced-by-count":2,"title":["A survey of diacritic restoration in abjad and alphabet writing systems"],"prefix":"10.1017","volume":"24","author":[{"given":"FRANKLIN \u1eccL\u00c1DI\u00cdP\u00d2\u0323","family":"ASAHIAH","sequence":"first","affiliation":[]},{"given":"\u1eccD\u00c9\u0323T\u00daNJ\u00cd \u00c0J\u00c0D\u00cd","family":"\u1eccD\u00c9\u0323J\u1eccB\u00cd","sequence":"additional","affiliation":[]},{"given":"EMMANUEL R\u00d3T\u00ccM\u00cd","family":"AD\u00c1G\u00daNOD\u00d2","sequence":"additional","affiliation":[]}],"member":"56","published-online":{"date-parts":[[2017,11,20]]},"reference":[{"key":"S1351324917000407_ref045","unstructured":"Mahar J. A. , and Memon G. Q. (2011). Lexicon based diacritic restorations using wordnet for sindhi. International Journal of Academic Research 3 (2): 37\u201343."},{"key":"S1351324917000407_ref034","unstructured":"Gamb\u00e4ck B. 1997. Processing Swedish Sentences: A Unification-Based Grammar and Some Applications. PhD Thesis, Sweden: Royal Institute of Technology."},{"key":"S1351324917000407_ref066","first-page":"430","volume-title":"Lecture Notes in Computer Science","author":"Truyen","year":"2008"},{"key":"S1351324917000407_ref060","doi-asserted-by":"crossref","unstructured":"Shaalan K. , Abo Bakr H. M. , and Ziedan I. 2009. A hybrid approach for building arabic diacritizer. In Proceedings of the EACL 2009 Workshop on Computational Approaches to Semitic Languages, Athens Greece, March 31, pp. 27\u201335.","DOI":"10.3115\/1621774.1621780"},{"key":"S1351324917000407_ref059","first-page":"270","volume-title":"AMTA-2008. 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Marrakech, Morocco. paper 54 on Conference CD."},{"key":"S1351324917000407_ref063","doi-asserted-by":"crossref","unstructured":"Simard M. , and Deslauriers A. 2001. Real-time automatic insertion of accents in French text. Natural Language Engineering 7 (2), 143\u201365.","DOI":"10.1017\/S1351324901002650"},{"key":"S1351324917000407_ref062","unstructured":"Simard M. 1998. Automatic insertion of accents in french texts. In Ide and Vuotilainen (eds.), Proceedings of the 3rd Conference on Empirical Methods in Natural Language Processing, Granada, Spain. Association for Computational Linguistics (ACL), Somerset, NJ, pp. 27\u201335."},{"key":"S1351324917000407_ref056","first-page":"309","volume-title":"INFuture2009: Digital Resources and Knowledge Sharing","author":"\u0160anti\u0107","year":"2009"},{"key":"S1351324917000407_ref036","first-page":"53","volume-title":"Proceedings of NAACL HLT 2007","author":"Habash","year":"2007"},{"key":"S1351324917000407_ref027","unstructured":"El-Sadany T. , and Hashish M. 1988. Semi-automatic vowelization of arabic verbs. In Proceedings of 10th National Computer Conference, Jeddah, pp. 725\u201332."},{"key":"S1351324917000407_ref038","unstructured":"Hl\u00e1dek D. , Sta\u0161 J. , and Juh\u00e1r J. 2016. Diacritics restoration in the slovak texts using hidden Markov model. In Z. Vetulani , H. Uszkoreit , and M. Kubis (eds.), Human Language Technology. Challenges for Computer Science and Linguistics: 6th Language and Technology Conference, LTC 2013, Pozna\u0144, Poland, December 7\u20139, 2013. Revised Selected Papers, Cham: Springer International Publishing, pp. 29\u201340."},{"key":"S1351324917000407_ref024","first-page":"3","article-title":"A robust language processor for African tone language systems","volume":"6","author":"Ekpenyong","year":"2009","journal-title":"Georgian Electronic Scientific Journal: Computer Science and Telecommunication"},{"key":"S1351324917000407_ref055","first-page":"117","volume-title":"Proceedings of Association for Computational Linguistics (ACL) ACL-08: HLT, Short Papers (Companion Volume)","author":"Roth","year":"2008"},{"key":"S1351324917000407_ref047","unstructured":"Marty F. , and Hart R. S. 1985. Computer program to transcribe french text into speech: Problems and suggested solutions. Technical Report LLL-T-6-85, University of Illinois, Urbana, Illinois, Language Learning Laboratory."},{"key":"S1351324917000407_ref026","doi-asserted-by":"publisher","DOI":"10.1016\/S0885-2308(03)00035-4"},{"key":"S1351324917000407_ref017","unstructured":"Bolshakov I. , Gelbukh A. , and Galicia-Haro S. 1999. A simple method to detect and correct Spanish accentuation typos. In A. Farghaly , and K. Megerdoomian (eds.), CProc. PACLING-99, Pacific Association for Computational Linguistics, pp. 104\u201313. Waterloo, Ontario, Canada: University of Waterloo, August 25\u201328."},{"key":"S1351324917000407_ref077","doi-asserted-by":"crossref","unstructured":"Zitouni I. , Sorensen J. S. , and Sarikaya R. 2006. 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Berlin: Springer-Verlag.","DOI":"10.1007\/978-3-540-74628-7_24"},{"key":"S1351324917000407_ref070","unstructured":"The Unicode Consortium. 2011. The Unicode Standard Version 6.0 Core Specification. Retrieved February 21, 2015 from http:\/\/www.unicode.org\/versions\/Unicode6.0.0\/ch06.pdf."},{"key":"S1351324917000407_ref064","volume-title":"FRACTAL 97","author":"Spriet","year":"1997"},{"key":"S1351324917000407_ref061","unstructured":"Shatta U. 1994. A systemic functional syntax analyzer and case-marker generator for speech acts in Arabic. In 19th International Conference for Statistics, Computer Science, Scientific & Social Applications. Cairo."},{"key":"S1351324917000407_ref058","doi-asserted-by":"crossref","unstructured":"Scannell K. P. 2011. Statistical unicodification of African languages. Language Resources and Evaluation, 1\u201312. 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In Proceedings of 3rd International Workshop on Spoken Languages Technologies for Under-resourced Languages, Cape Town, South Africa. Retrieved August 12, 2012 from http:\/\/www.mica.edu.vn\/sltu2012\/files\/proceedings\/10.pdf."},{"key":"S1351324917000407_ref018","volume-title":"One in the Bush: Low-Density Language Technology","author":"Borin","year":"2009"},{"key":"S1351324917000407_ref001","doi-asserted-by":"publisher","DOI":"10.1007\/s10032-015-0242-2"},{"key":"S1351324917000407_ref028","unstructured":"Elshafei M. , Al-Muhtaseb H. , and Alghamdi M. 2006a. Statistical methods for automatic diacritization of arabic text. In Proceedings of the Saudi 18th National Computer Conference NCC18, Riyadh, vol. 18, Saudi Arabia, pp. 301\u20136."},{"key":"S1351324917000407_ref042","first-page":"282","volume-title":"Proceedings of the International Conference on Machine Learning ICML 2001","author":"Lafferty","year":"2001"},{"key":"S1351324917000407_ref025","first-page":"9","article-title":"A Statistical Approach for Qur\u2019an Vowel Restoration","volume":"8","author":"El-Harby","year":"2008","journal-title":"ICGST-AIML Journal"},{"key":"S1351324917000407_ref016","first-page":"39","article-title":"A maximum entropy approach to natural language processing","volume":"22","author":"Berger","year":"1996","journal-title":"Computational Linuistics"},{"key":"S1351324917000407_ref031","doi-asserted-by":"crossref","unstructured":"Ezeani I. , Hepple M. , and Onyenwe I. 2016. Automatic restoration of diacritics for Igbo language. In P. Sojka , A. Hor\u00e1k , I. Kope\u010dek , and K. Pala (eds.), Text, Speech, and Dialogue: 19th International Conference, TSD 2016, Brno, Czech Republic, September 12\u201316, 2016, Proceedings, Cham: Springer International Publishing, pp. 198\u2013205.","DOI":"10.1007\/978-3-319-45510-5_23"},{"key":"S1351324917000407_ref043","volume-title":"Encyclopedia of Library and Information Science","author":"Liddy","year":"2001"},{"key":"S1351324917000407_ref009","doi-asserted-by":"crossref","unstructured":"Al-Badrashiny M. , Hawwari A. , and Diab M. 2017. A layered language model based hybrid approach to automatic full diacritization of arabic. In WANLP 2017 (co-located with EACL 2017), pp. 177\u201384.","DOI":"10.18653\/v1\/W17-1321"},{"key":"S1351324917000407_ref057","unstructured":"Sarikaya R. , Emam O. , Zitouni I. , and Gao Y. 2006. Maximum entropy modeling for diacritization of arabic text. In INTERSPEECH 2006 - ICSLP, 9th International Conference on Spoken Language Processing, Pittsburgh, PA. ISCA. paper 1418-Mon1BuP.11."},{"key":"S1351324917000407_ref010","first-page":"125","article-title":"Automatic restoration of arabic diacritics: a simple, purely statistical approach","volume":"35","author":"Alghamdi","year":"2010","journal-title":"The Arabian Journal for Science and Engineering"},{"key":"S1351324917000407_ref023","first-page":"1117","volume-title":"Routledge Encyclopedia of Linguistics","author":"Ding","year":"2005"},{"key":"S1351324917000407_ref074","doi-asserted-by":"crossref","unstructured":"Yarowsky D. 1994. Decision List for Lexical Ambiguity Resolution: Application to Accent Restoration in Spanish and French. 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