Overview
While NLP is the broad field, NLU is specifically about the 'understanding' part. It involves parsing text to identify concepts, entities, and the user's underlying goal.
Key Tasks
- Intent Classification: Determining what the user wants to do (e.g., 'book a flight').
- Slot Filling: Extracting specific parameters for a request (e.g., 'to London' on 'Friday').
- Coreference Resolution: Figuring out what pronouns like 'it' or 'he' refer to.
- Disambiguation: Resolving the meaning of ambiguous words based on context.
Importance
NLU is the 'brain' of chatbots and virtual assistants, allowing them to have meaningful interactions rather than just matching keywords.