NLP Pipeline

Monday, March 6th 2023

An NLP pipeline typically consists of several stages or components that process the input text and produce various outputs or predictions. Here are the main elements of an NLP pipeline:

  1. Text preprocessing: This involves cleaning and normalizing the input text, such as removing punctuation, converting to lowercase, and tokenizing into words or subword units.

  2. Part-of-speech (POS) tagging: This involves assigning a part of speech (e.g., noun, verb, adjective) to each word in the text.

  3. Named entity recognition (NER): This involves identifying and categorizing named entities (e.g., person, organization, location) in the text.

  4. Dependency parsing: This involves analyzing the syntactic structure of the text and identifying the relationships between words, such as subject-verb and modifier-noun relationships.

  5. Semantic role labeling (SRL): This involves identifying the semantic roles played by each word in a sentence, such as agent, patient, and location.

  6. Sentiment analysis: This involves determining the overall sentiment or polarity of the text, such as positive, negative, or neutral.

  7. Coreference resolution: This involves identifying all the expressions in a text that refer to the same entity, as described in a previous question.

Elements of an NLP Pipeline

graph TD; A[Input text] --> B(Text preprocessing); B --> C(POS tagging); C --> D(NER); D --> E(Dependency parsing); E --> F(SRL); F --> G(Sentiment analysis); G --> H(Coreference resolution);

Note that this is a simplified representation and there may be additional stages or subcomponents depending on the specific implementation and use case. Additionally, the order of the stages may vary depending on the requirements of the task.