Is Business Process Execution Language (BPEL) used for service orchestration?
BPEL is an XML-based language for describing business process workflows that involve the interaction with multiple services. A BPEL engine executes code written in BPEL and coordinates the invocation of the services in the workflow. There are modifiability, interoperability, performance, and reliability implications both for using BPEL and for not using it. The architect must consider those implications when deciding whether to use the language. • What approach is used for service versioning? Services and even individual operations within a service can be versioned independently of other system components. When the service is used by an unknown number of external service users, a common requirement is for old and new versions to coexist. That requirement makes configuration management and deployment more complex. Because decisions about SOA tend to be pervasive and have a significant and broad impact on business, performing an early architecture evaluation is particularly valuable and
