ExpertGraphRAG
The retrieval module of the LEGO framework. It uses an expert-annotated knowledge graph of legal provisions and performs graph retrieval based on normative relations rather than semantic similarity, employing a greedy norm-coverage algorithm to dynamically extract relevant provision subgraphs.
Timeline (last 90 days)
LEGO is a dual-module framework composed of two components, ExpertGraphRAG and ExpertCoT, designed to address the two bottlenecks of retrieval and reasoning in legal reasoning.
ExpertGraphRAG uses an expert-annotated civil code graph that explicitly encodes normative relationships between provisions and employs a greedy normative-coverage retrieval algorithm to dynamically extract relevant provision subgraphs.
Ablation experiments confirm that the ExpertGraphRAG and ExpertCoT modules each make independent contributions and that the two are complementary.
All Facts (3)
LEGO is a dual-module framework composed of two components, ExpertGraphRAG and ExpertCoT, designed to address the two bottlenecks of retrieval and reasoning in legal reasoning.
50%UnverifiedExpertGraphRAG uses an expert-annotated civil code graph that explicitly encodes normative relationships between provisions and employs a greedy normative-coverage retrieval algorithm to dynamically extract relevant provision subgraphs.
50%UnverifiedAblation experiments confirm that the ExpertGraphRAG and ExpertCoT modules each make independent contributions and that the two are complementary.
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