..........................................NEXT PREVIOUS INDEX
L01 Intro NLP - Applications and Techniques NLP : Introduction o Language: A unique ability of humans o Language for communication - Major function of language: communication. * How ideas get transferred? o Applications - Information extraction * Machine goes through text, fills in a template - Information retrieval * Keyword indexing * Phrasal indexing * XML tagging - Question answering * Understanding and action - Machine translation * Sentential analyzers * Bilingual dictionary - Dialogue systems * Expectation * Focus * Topic o Form & meaning - Sentences -> Meaning * Done in layers. Output of each layer successively makes meaning more explicit (i.e., closer to meaning or gives a representation which machine can handle more easily) - How can meaning be represented ? o Techniques for "extracting meaning" - Word analysis - Phrasal analysis - Sentential analysis etc. - Statistical analysis: tagging, grammatical attachment, word sense..........................................NEXT PREVIOUS INDEX