Rules for extracting IS-A relation Searching for these patterns in unstructured text is a good way of finding is-a relationships. Y such as X ( (, X )* (, and | or ) X )* such Y as X X or other Y X and other Y Y including X Y , especially X Example: to either i/o devices such as disk tape or optical drives or i/o cards.   parsing this sentence for the pattern Y such as X ( or X )*     yields: disk tape IS-A i/o device optical drive IS-A i/o device i/o card IS-A i/o device     Challenges:   1. The parsing solution must rely on part-of-speech... [More]

Tags:  ontology triple_store relation hyponyms unstructured_data language_modeling hypernyms nlp is-a large_text_corpora