kallia 0.1.0

Semantic Document Processing Library

Kallia

Semantic Document Processing Library

Kallia is a FastAPI-based document processing service that converts documents into intelligent semantic chunks. The library specializes in extracting meaningful content segments from documents while preserving context and semantic relationships.

🚀 Features

• Document-to-Markdown Conversion: Standardized processing pipeline for consistent output
• Semantic Chunking: Intelligent content segmentation that respects document structure and meaning
• PDF Support: Currently supports PDF documents with extensible architecture for additional formats
• RESTful API: Clean, well-documented API interface with comprehensive error handling
• Configurable Processing: Adjustable parameters for temperature, token limits, and page selection
• Docker Ready: Containerized deployment with Docker and docker-compose support
• Vision-Language Model Integration: Leverages advanced AI models for content understanding

📋 Prerequisites

• Python 3.11 or higher
• Docker (optional, for containerized deployment)
• Access to a compatible language model API (OpenRouter, Ollama, etc.)

🛠️ Installation

Local Development Setup

1. Clone the repository

   git clone https://github.com/kallia-project/kallia.git
   cd kallia
   

2. Install dependencies

   pip install -r requirements.txt
   

3. Configure environment variables

   cp .env.example .env
   

   Edit .env with your configuration:

   API_KEY=your_api_key_here
   BASE_URL=https://openrouter.ai/api/v1
   MODEL=qwen/qwen2.5-vl-32b-instruct
   

4. Run the application

   fastapi run kallia/main.py --port 8000
   

Docker Deployment

1. Using Docker Compose (Recommended)

   docker-compose up -d
   

2. Manual Docker Build

   docker build -t kallia-project/kallia:0.1.0 .
   docker run -p 8000:80 -e API_KEY=ollama -e BASE_URL=http://localhost:11434/v1 -e MODEL=qwen2.5vl:32b kallia-project/kallia:0.1.0
   

⚙️ Configuration

Environment Variables

Variable	Description	Example
API_KEY	API key for your language model provider	ollama
BASE_URL	Base URL for the API endpoint	http://localhost:11434/v1
MODEL	Model identifier to use	qwen2.5vl:32b

Supported Providers

• OpenRouter: Use OpenRouter API for access to various models
• Ollama: Local model deployment with Ollama
• Custom Endpoints: Any OpenAI-compatible API endpoint

📖 Usage

API Endpoint

POST /chunks

Converts a document into semantic chunks with concise summaries.

Request Body

{
  "url": "https://example.com/document.pdf",
  "page_number": 1,
  "temperature": 0.0,
  "max_tokens": 8192
}

Parameters

• url (string, required): URL to the document to process
• page_number (integer, optional): Specific page to process (default: 1)
• temperature (float, optional): Model temperature for processing (default: 0.0)
• max_tokens (integer, optional): Maximum tokens for processing (default: 8192)

Response

{
  "chunks": [
    {
      "original_text": "Original document content...",
      "concise_summary": "Concise summary of the content..."
    }
  ]
}

Example Usage

cURL

curl -X POST "http://localhost:8000/chunks" \
  -H "Content-Type: application/json" \
  -d '{
    "url": "https://example.com/document.pdf",
    "page_number": 1,
    "temperature": 0.0,
    "max_tokens": 4096
  }'

Python

import requests

response = requests.post(
    "http://localhost:8000/chunks",
    json={
        "url": "https://example.com/document.pdf",
        "page_number": 1,
        "temperature": 0.0,
        "max_tokens": 4096
    }
)

chunks = response.json()["chunks"]
for chunk in chunks:
    print(f"Summary: {chunk['concise_summary']}")
    print(f"Original: {chunk['original_text']}")

🏗️ Project Structure

kallia/
├── kallia/
│   ├── __init__.py
│   ├── main.py              # FastAPI application entry point
│   ├── models.py            # Pydantic models for API
│   ├── constants.py         # Application constants
│   ├── documents.py         # Document processing logic
│   ├── chunker.py           # Semantic chunking implementation
│   ├── utils.py             # Utility functions
│   ├── logger.py            # Logging configuration
│   ├── settings.py          # Application settings
│   ├── exceptions.py        # Custom exceptions
│   ├── messages.py          # Message handling
│   ├── prompts.py           # AI model prompts
│   ├── image_caption_serializer.py
│   └── unordered_list_serializer.py
├── requirements.txt         # Python dependencies
├── Dockerfile              # Docker container configuration
├── docker-compose.yml      # Docker Compose setup
├── .env.example           # Environment variables template
└── README.md              # This file

🔧 Development

Code Style

The project follows Python best practices and uses:

• FastAPI for web framework
• Pydantic for data validation
• Structured logging
• Comprehensive error handling

📦 Dependencies

Core Dependencies

• FastAPI: Modern, fast web framework for building APIs
• Docling: Document processing and conversion library
• RapidOCR: OCR capabilities for text extraction
• OpenCV: Computer vision library for image processing

Full Dependency List

See requirements.txt for complete dependency specifications:

• fastapi[standard]==0.115.14
• docling==2.38.1
• rapidocr-onnxruntime==1.4.4
• opencv-python-headless==4.11.0.86

🚨 Error Handling

The API provides comprehensive error handling with appropriate HTTP status codes:

• 400 Bad Request: Invalid parameters or unsupported file format
• 500 Internal Server Error: Processing errors
• 503 Service Unavailable: External service connectivity issues

📄 License

This project is licensed under the Apache License 2.0 - see the LICENSE file for details.

👨‍💻 Author

CK

• GitHub: @kallia-project

🔗 Links

• GitHub Repository
• Issues

📈 Version

Current version: 0.1.0

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