# What is NLP
Natural Language Processing
- Subfield of @AI
NLP is used that computers understand unstructured text
- because humans don’t communicate with numbers, …
# (un)strutured files
| structured | semi-structured | unstructured |
|---|---|---|
| Databases | JSON | Images |
| Excel-tables | XML | Audios |
| … | … | … |
# Components of NLP
| Component | Definition |
|---|---|
| a. Lexical Analysis | divide chunk of text into paragraphs, sentences, words |
| b. Syntactic Analysis | Examines grammar, arranging words to show relationships |
| c. Semantic Analysis | Interprets word meaning; checks text meaningfulness |
| d. Discourse Analysis | considers sentence context; references within the text |
| e. Pragmatic Analysis | Focusses on overall language communication & interpretation in various situations |
# Use Cases - NLP
- Machine Translation
- Speech Recognition
- Sentiment Analysis - customer emotions
- Chatbot
- Intelligent System
- Text Classification
- …
# Types of NLP
| Type | Complete | Definition | Example |
|---|---|---|---|
| NE-Recognition | Namend-Entity Recognition | classification of proper names | ”IBM” |
| WSD | Word sense disambiguation | correct meaning of word - when word has multiple meanings | ”pen”: 1. a writing implement; 2. female swan; … |
| POS | Part-Of-Speech-Tagging | assigns grammatical category (part of speech) to each word | ”Petra/NE reads/VB a/ART long/ADJ …” |
| Coreference Resolution | Coreference Resolution | gets pronouns with correct antecedents | ”I voted for Mayer, because he was most aligned with my values.” |