Final answer:
The WSDL file in a BPEL process contains several elements unique to BPEL, but 'partLinks' are not among them. Elements like PartnerLinkType, PortType, Messages, and Types define the interaction with external services, their operations, and the data exchanged.
Step-by-step explanation:
The question refers to the Business Process Execution Language (BPEL), which is used for specifying business process behaviors based on Web Services. In a BPEL process, a WSDL (Web Services Description Language) file is used to define the interface that the process exposes to the outside world. This includes the operations that the service provides, the messages that are exchanged, and the data types used within these messages.
In BPEL, the WSDL file is enhanced with additional BPEL-specific elements that describe the behavior of the process. However, 'partLinks' are not part of the WSDL elements defined by BPEL. Instead, BPEL's WSDL file typically includes the following additional elements:
- PartnerLinkType - Defines the roles that services play in the interaction and the port types that they use.
- PortType - A set of operations that define a service's interface.
- Messages - The format of data being sent.
- Types - The data type definitions used within messages.
These elements work together to allow the BPEL process to interact with external services, detailing how messages are sent and received, and what operations are available for communication between services. Understanding these components is essential for designing and implementing robust and interoperable web services.