The Corpus Thread - Det Danske Sprog- og Litteraturselskab

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8.1. Enhancing existing material 154 Outline of this chapter This chapter describes the anatomy of the full-form lexicon that is used for part-of-speech (= POS) tagging. It gives an introduction to material that existed prior to the development of the ePOS tagger (Section 8.1) and provides an account of how this material was enhanced in order to suit the needs of ePOS tagging. Finally, in Section 8.2, the ePOS full-form lexicon is described in detail. 8.1 Enhancing existing material . . . . . . . . . . . . . . . . . 154 8.1.1 ONC-Flexion . . . . . . . . . . . . . . . . . . . . . 155 8.2 Anatomy of the jaPOS lexicon . . . . . . . . . . . . . . . . 158 8.3 Inflectional paradigms . . . . . . . . . . . . . . . . . . . . 158 8.3.1 Nouns . . . . . . . . . . . . . . . . . . . . . . . . . 158 8.4 Further reading . . . . . . . . . . . . . . . . . . . . . . . . 158 8.1 Enhancing existing material The input to the full-form lexicon we need for tagging (see Chapter 7) derives from three lexical resources: ONC-Flexion, Flexikon, and – to a certain extent – the PAROLE Corpus itself, cf. Figure 8.1. ONC-Flexion was derived from existing machine-readable dictionaries in the early 1990s and used as a basis for inflectional information in The Danish Dictionary, DDO. Flexikon was derived from an early version of the DDO around 2000 and used for various purposes in conjunction with the Korpus 2000 website. The PAROLE Corpus, on which the initial language model of the ePOS tagger is based, provides additional lexical entries, however, these entries are not verified and are therefore kept separately in an auxiliary lexicon. At a later point in time new corpus material will be used to enhance the ePOS lexicon that is meant to sever as a primary source for inflectional information in the DDO. The following sections give a more detailed account of the lexical sources of ePOS.
8.1. Enhancing existing material 155 PAROLE ePOS tag set ePOS lexicon 8.1.1 ONC-Flexion 8.1.1.1 Description Misc. dictionary data ONC-Flexion New corpus material Figure 8.1: Sources of the ePOS lexicon DDO Flexikon ONC-Flexion 1 is a full-form list with information on parts of speech and inflection for about 80,000 lemmas. ONC-Flexion was originally developed by Ole Norling Christensen in the early 1990s in order to facilitate the process of writing The Danish Dictionary, DDO. ONC-Flexion has since been enhanced by the Korpus 2000 project and a free version of it can be downloaded through the ordnet.dk website. As ONC-Flexion is the most comprehensive and elaborate full-form lexicon of Danish currently freely available, it is used as the major source of the ePOS full-form lexicon. The lemmas of ONC-Flexion originate from various older sources from the 1980s, and their inflectional forms have been derived from the source information and automatically supplemented in a number of cases. The selection is very wide, and a number of words are hardly relevant (e.g. proper nouns, nonce formations). The majority, however, are words also included in The Danish Dictionary, DDO. In addition, DDO also includes other, particularly newer words that are not in the list. 1 Free download from: http://korpus.dsl.dk/e-resurser/boejningsformer_download.php?lang=en
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2.2. Implementation 17 and metadata
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4.2. Formatting text 91 udvikle ude
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Part III Collecting 97
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Page 175 and 176: Bibliography Andersen, M. S., Asmus
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