ragflow/rag/nlp
hsparks.codes d104f59e29 feat: Implement hierarchical retrieval architecture (#11610)
This PR implements the complete three-tier hierarchical retrieval architecture
as specified in issue #11610, enabling production-grade RAG capabilities.

## Tier 1: Knowledge Base Routing
- Auto-route queries to relevant knowledge bases
- Per-KB retrieval parameters (KBRetrievalParams dataclass)
- Rule-based routing with keyword overlap scoring
- LLM-based routing with fallback to rule-based
- Configurable routing methods: auto, rule_based, llm_based, all

## Tier 2: Document Filtering
- Document-level metadata filtering within selected KBs
- Configurable metadata fields for filtering
- LLM-generated filter conditions
- Metadata similarity matching (fuzzy matching)
- Enhanced metadata generation for documents

## Tier 3: Chunk Refinement
- Parent-child chunking with summary mapping
- Custom prompts for keyword extraction
- LLM-based question generation for chunks
- Integration with existing retrieval pipeline

## Metadata Management (Batch CRUD)
- MetadataService with batch operations:
  - batch_get_metadata
  - batch_update_metadata
  - batch_delete_metadata_fields
  - batch_set_metadata_field
  - get_metadata_schema
  - search_by_metadata
  - get_metadata_statistics
  - copy_metadata
- REST API endpoints in metadata_app.py

## Integration
- HierarchicalConfig dataclass for configuration
- Integrated into Dealer class (search.py)
- Wired into agent retrieval tool
- Non-breaking: disabled by default

## Tests
- 48 unit tests covering all components
- Tests for config, routing, filtering, and metadata operations
2025-12-09 07:32:00 +01:00
..
__init__.py Import rag_tokenizer from Infinity (#11647) 2025-12-02 14:59:37 +08:00
query.py feat: add OceanBase doc engine (#11228) 2025-11-20 10:00:14 +08:00
rag_tokenizer.py Import rag_tokenizer from Infinity (#11647) 2025-12-02 14:59:37 +08:00
search.py feat: Implement hierarchical retrieval architecture (#11610) 2025-12-09 07:32:00 +01:00
surname.py Update info (#1005) 2024-05-31 09:53:04 +08:00
synonym.py Move 'get_project_base_directory' to common directory (#10940) 2025-11-02 21:05:28 +08:00
term_weight.py Refactor function name (#11210) 2025-11-12 19:00:15 +08:00