What are the Levels in Natural Language Processing (NLP)
Levels in Natural Language Processing (NLP)
Basically, there is a total of seven independent levels to understand and extract the meaning from a text.
1. Phonology Level
- At this level basically, it deals with pronunciation.
- It deals with the interpretation of speech sound across words
2. Morphological Level
- It deals with the smallest words that convey meaning and suffixes and prefixes.
- Morphemes mean studying the words that are built from smaller meanings.
- E.g So the rabbit word has single morphemes while the rabbits have two morphemes.
- The ‘s’ denotes the singular and plural concepts.
3. Lexical Level
- This deals with the study at the level of words with respect to their lexical meaning and Part of speech (POS)
- It uses the lexicon that is collection of lexemes.
- A Lexeme is a basic unit of lexical meaning which is an abstract unit of morphological analysis
4. Syntactic Level
- This level deals with the grammar and structure pf sentences
- It studies the proper relationships between the words.
- The POS tagging output of lexical analysis can be used at the syntactic level of two group words into the phrase and clause brackets.
5. Semantics Level
- This level deals with the meaning of words and sentences
- There are different two approaches :
- 1) Syntax driven semantic analysis
- 2) Semantic grammer
- Its a study of meaning of words that are associated with grammatical structure.
6. Disclosure Level
- This level deals with the structure of different kinds of text.
- There are 2 types of discourse :
- 1) Anaphora resolution
- 2) Discourse/ text structure recognition
- Words are replaced in anaphora resolution.
7. Pragmatic Level
- This level deals with the use real world knowledge and understanding of how this influences the meaning of what is being communicated.
- Pragmatics identifies the meaning of words and phrases based on how language is used to communicate.
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