[...] - Composable services: initiatives reusing not just data but software components. In the context of Service Oriented Architecture, different object composing the service are separated in terms of responsibility from a business oriented point of view and they interact through Application Programming Interfaces (Rest or Soap, XML or JSON). For instance, Unit4 Access Point (https://ap.unit4.com/) builds on PEPPOL services to provides API access that integrates with invoicing services of business and government.