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Excalidraw Data
Text Elements
Source Documents
LLM Entity Extraction
🕸️ Knowledge Graph
Elon Musk
SpaceX
NASA
Tesla
EVs
Starship
Mars Mission
founded
competitor
CEO
industry
develops
for
Community Detection (Leiden)
Hierarchical Communities
Level 0:
Entire Graph Summary (1 community)
Level 1:
Space Technology
EV Industry
People
Level 2:
SpaceX Ops
NASA Contracts
Tesla Prods
EV Market
Executives
Query Time
Local Search
Entity-Centric Retrieval
• Extract entities from query
• Traverse graph (1-2 hops)
• Retrieve subgraph + chunks
Fast (~200-400ms)
Global Search
Map-Reduce Over Summaries
• Select community level
• Map: LLM call per summary
• Reduce: Synthesize answers
Slower (1-5s, 10+ LLM calls)
“Who founded SpaceX?”
“What are main themes?”
INDEXING PHASE (Offline)
QUERY PHASE (Runtime)