Annotation and representation of a diachronic corpus of Spanish
Cristina Sánchez-Marco, Gemma Boleda, Josep Maria Fontana and Judith Domingo
In: LREC 2010, 19-21 May 2010, Valletta, Malta.
In this article we describe two different strategies for the automatic tagging of a Spanish diachronic corpus involving the adaptation
of existing NLP tools developed for modern Spanish. In the initial approach we follow a state-of-the-art strategy, which consists on
standardizing the spelling and the lexicon. This approach boosts POS-tagging accuracy to 90, which represents a raw improvement
of over 20% with respect to the results obtained without any pre-processing. In order to enable non-expert users in NLP to use this
new resource, the corpus has been integrated into IAC (Corpora Interface Access). We discuss the shortcomings of the initial approach
and propose a new one, which does not consist in adapting the source texts to the tagger, but rather in modifying the tagger for the
direct treatment of the old variants.This second strategy addresses some important shortcomings in the previous approach and is likely
to be useful not only in the creation of diachronic linguistic resources but also for the treatment of dialectal or non-standard variants of
synchronic languages as well.