# Task 16.2 - CCAM Referential Import Summary

## Status: COMPLETED ✅

## Overview
Successfully implemented CCAM referential import from Excel file with chunking and vector indexing.

## What Was Done

### 1. Excel File Analysis
- Analyzed CCAM_V81.xls structure (30,778 rows, 11 columns)
- Identified CCAM code format: 7 characters (4 letters + 3 digits)
- Mapped column structure: Code, Text/Description, Activity, Phase, Tariffs, etc.

### 2. Import Script Creation
Created `scripts/import_ccam.py` with the following features:
- Excel file reading using xlrd library
- Structured text extraction preserving:
  - Chapter hierarchy
  - CCAM codes with descriptions
  - Activity and phase information
  - Exclusion notes and technical notes
- Integration with ReferentielsManager
- Chunking with CCAM-specific strategy
- Vector indexing with FAISS

### 3. Dependencies Added
Updated `pyproject.toml` with Excel processing libraries:
- openpyxl >= 3.1.0
- xlrd >= 2.0.0

### 4. Import Results
Successfully imported CCAM V81:
- **Source file**: data/referentiels/CCAM_V81.xls
- **Extracted text**: 2,427,859 characters (66,790 lines)
- **Chunks created**: 657 chunks
- **Chunk strategy**: Preserves CCAM extensions ATIH (7+3 character codes)
- **Vector dimension**: 384 (using sentence-transformers multilingual model)
- **Index type**: HNSW (Hierarchical Navigable Small World)
- **File hash**: 9c151fcf4ed967db...
- **Index hash**: ac791d9687725c92...

### 5. Generated Files
```
data/referentiels/
├── CCAM_V81.xls                    # Original Excel file
├── ccam_V81_extracted.txt          # Structured text extraction (2.4 MB)
├── ccam_V81_text.txt               # Text for chunking (2.4 MB)
├── ccam_V81_chunks.json            # 657 chunks with metadata (2.9 MB)
└── ccam_V81_index.faiss            # Vector index (1.2 MB)
```

## Technical Details

### Chunking Strategy
The CCAM chunking preserves:
- Chapter and section structure
- CCAM codes with full descriptions
- Activity and phase metadata
- Technical notes and conditions
- Extensions ATIH (3-character suffixes)
- Target chunk size: ~700 tokens (2,800 characters)
- Max chunk size: ~1,024 tokens (4,096 characters)
- Overlap: ~100 tokens (400 characters)

### Code Structure
CCAM codes follow the format:
- **Base code**: 4 letters + 3 digits (e.g., AHQP001)
- **Extension ATIH**: Optional +3 characters (e.g., AHQP001+ABC)

### Script Usage
```bash
# Import with indexing (full import)
python3 scripts/import_ccam.py

# Import without indexing (faster, for testing)
python3 scripts/import_ccam.py --skip-indexing

# Custom options
python3 scripts/import_ccam.py \
  --excel-file path/to/CCAM.xls \
  --version V81 \
  --data-dir data/referentiels
```

## Integration with Pipeline

The imported CCAM referential is now ready for use in:
1. **RAGEngine**: Search for CCAM codes using natural language queries
2. **Codeur**: Propose CCAM codes based on clinical facts
3. **Verificateur**: Validate proposed CCAM codes against referential
4. **GroupageValidator**: Validate CCAM codes for groupage

## Next Steps

The CCAM referential is fully imported and indexed. The system can now:
- Search CCAM codes by description
- Retrieve CCAM codes with similarity scores
- Validate CCAM codes against the official referential
- Use CCAM codes in the coding pipeline

## Files Modified
- `scripts/import_ccam.py` (created)
- `pyproject.toml` (added Excel dependencies)
- `data/referentiels/CCAM_V81.xls` (moved to correct location)

## Requirements Satisfied
- 3.1: Import et normalisation des référentiels ATIH
- 3.2: Génération de hash SHA-256 pour versionnement
- 3.3: Enregistrement des métadonnées de version
- 13.1: Import des référentiels avec hash
- 23.4: Chunking CCAM avec préservation des extensions ATIH
- 23.1: Vectorisation avec modèle d'embeddings
- 23.5: Construction d'index HNSW avec FAISS
