Summarization Systems
Types of Summarization
Extractive: Select key sentences from original Abstractive: Generate new text capturing key points
LLMs excel at abstractive summarization.
Summarization Strategies
1. Length-Based "Summarize in 2-3 sentences" "Create a 100-word summary"
2. Audience-Based "Summarize for executives" "Summarize for technical readers"
3. Purpose-Based "Create an action-item summary" "Highlight key decisions made"
Handling Long Documents
When content exceeds context length: 1. Chunking: Split into sections, summarize each 2. Hierarchical: Summarize summaries 3. Map-Reduce: Parallel chunk summarization + combine