A Part-Of-Speech Tagger (POS Tagger) is a piece of software that reads text in some language and assigns parts of speech to each word (and other token), such as noun, verb, adjective, etc., although generally computational applications use more fine-grained POS tags like 'noun-plural'. This software is a Java implementation of the log-linear part-of-speech taggers...
Products for discovering and storing metadata, natural language processing, & more. Third link's to Geospatial Semantic Web Blog w/update on Metalink's ability to map its descriptions into RDF.
D. Jurafsky, and J. Martin. Prentice Hall series in artificial intelligence Prentice Hall, Pearson Education International, Englewood Cliffs, NJ, 2. ed., Pearson International Edition edition, (2009)