Editing Sentence extraction (section)

{{Short description|Text summarization technique}}
'''Sentence extraction''' is a technique used for [[automatic summarization]] of a text.
In this shallow approach, [[heuristic (computer science)|statistical heuristics]] are used to identify the most salient sentences of a text. Sentence extraction is a low-cost approach compared to more knowledge-intensive deeper approaches which require additional knowledge bases such as [[ontology (computer science)|ontologies]] or [[linguistics|linguistic knowledge]]. In short, sentence extraction works as a filter that allows only meaningful sentences to pass.

The major downside of applying sentence-extraction techniques to the task of summarization is the loss of [[coherence (linguistics)|coherence]] in the resulting summary. 
Nevertheless, sentence extraction summaries can give valuable clues to the main points of a document and are frequently sufficiently intelligible to human readers.