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AI & Machine Learning · Foundational

Summarization

Condensing a document into a shorter version that preserves key information.

Definition

Extractive summarization selects existing sentences, while abstractive summarization generates new text, as LLMs do. Abstractive summaries read better but risk hallucination. ROUGE is the classic automatic metric.

Exam tip

Abstractive = generated wording (LLMs); extractive = copied sentences.

Related terms