Adding Morpho-semantic Relations to the Romanian Wordnet

Keeping pace with other wordnets development, we present the challenges raised by the Romanian derivational system and our methodology for identifying derived words and their stems in the Romanian Wordnet. To attain this aim we rely only on the list of literals in the wordnet and on a list of Romanian affixes; the automatically obtained pairs require automatic and manual validation, based on a few heuristics. The correct members of the pairs are linked together and the relation is associated a semantic label whenever necessary. This label is proved to have cross-language validity. The work reported here contributes to the increase of the number of relations both between literals and between synsets, especially the cross-part-of-speech links. Words belonging to the same lexical family are identified easily. The benefits of thus improving a language resource such as wordnet become self-evident. The paper also contains an overview of the current status of the Romanian wordnet and an envisaged plan for continuing the research.