Creating Domain Packages

How to create domain-specific calculation packages.

Overview

Domain packages organize related calculations:

Growth calculations
Profitability metrics
Risk assessments
Custom business logic

Package Structure

# my_domain/__init__.py
from .calculations import calculate_metric
from .types import CustomValue

__all__ = ['calculate_metric', 'CustomValue']

Calculation Functions

# my_domain/calculations.py
from metricengine import register_calculation

@register_calculation
def my_metric(revenue, cost):
    return (revenue - cost) / revenue

Integration

Register your package with Metric Engine for seamless integration.