Extractive text simplification (TS) is based on selecting or highlighting the most meaningful parts of a text, e.g. to be used as the basis for text summarisation.
Abstractive TS is based on novel text generation. Instead of pulling out individual paragraphs, one might paraphrase sentences or use synonyms.
Minimal substitutions may lead to better results since the likelihood of significantly changing grammar and meaning of the input text is much lower. The key is finding a balance between efficiency and effectivity.
- [b] TF-IDF (extractive)
- [b] CWI