Approaches
Three standard approaches are now widely accepted
- Hand-written regular expressions (perhaps stacked)
- Using classifiers
- Generative: naïve Bayes classifier
- Discriminative: maximum entropy models
- Sequence models
- Hidden Markov model
- CMMs/MEMMs
- Conditional random fields (CRF) are commonly used in conjunction with IE for tasks as varied as extracting information from research papers to extracting navigation instructions.
Numerous other approaches exist for IE including hybrid approaches that combine some of the standard approaches previously listed.
Read more about this topic: Information Extraction
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