Creating parallel and comparable corpora for work in domain specific areas of language


Parallel corpora - alignment & annotation problems



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Parallel corpora - alignment & annotation problems

  • Different linguistic theories = different annotation schemes
    • E.g. Morphological, syntactic or semantic?
  • Different languages = different annotation schemes
    • E.g. English / Portuguese / Polish / Finnish /Chinese
  • Different languages = different types of alignment
    • E.g. English / Hebrew / Chinese

Parallel corpora - professional uses

  • Translation memories – aligned collections of repetitive texts in special domains
    • Provide previous translations for translator to consult / copy
    • Allow economy in translation process
    • Provide material for probabilistic machine translation
    • E.g. EU translation services, Canadian Hansard

Translation memories – requirements

  • “Garbage in = garbage out!”
  • Original > good quality – hence
    • Emphasis on: good editing and proof reading > controlled language
    • E.g. EU documentation – training people to edit English documents written by non-native speakers
  • Translation > good quality – but certain parallel relationship to the original
  • Therefore: tendency to homogeneity
    • (e.g. Eurospeak)

Parallel corpora - academic uses

  • For studying the translation process
  • For studying translation solutions
  • E.g.
    • INTERSECT – French/English (Brighton)
    • English-Norwegian Parallel Corpus Project (Oslo)
    • COMPARA/DISPARA – Portuguese/English – online at http://www.portugues.mct.pt/
  • For terminology extraction

Parallel corpora - requirements

  • Theory should allow for any original + translation - warts and all!
    • Much literary criticism of translation thrives on the ‘warts’!
    • Useful for study of errors, translationese etc
  • Practical applications require quality:
    • Contrastive linguistics
    • Pedagogical applications
    • Terminology extraction

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