What is Service-Oriented Architecture - 10 Key Web Service API Attributes in API, Java, REST, Service, SOA Services in a Service-Oriented Architecture must be: 1. Interface, Policy and Contract based 2. Location transparency 3. Autonomous 4. Abstract 5. Reusable 6. Composable 7. Stateless 8. Discoverable 9. Extensible 10. Loosely coupled Share: