Soa Contract Versioning

This document discusses service-oriented architecture (SOA) principles and guidelines for versioning contracts, services, and schemas in an SOA. It covers SOA design maturity levels and principles. It recommends using standardized service contracts and loose coupling between services. The document discusses versioning of artifacts like contracts, WSDL, and XSD schemas. It provides guidelines for naming conventions, backwards compatibility, and maintaining multiple active versions of services. It also discusses service models, interfaces, and designing messages and data types according to interoperability best practices.