BPMN2 — Required definitions to invoke an existing function by means of a service task

It is not precisely defined what definitions must be made in order to specify that a particular executable is to be invoked as an implementation of an operation of a service task (for example).

The specification should clearly spell out which definition are mandatory in order to capture the major scenarios, e.g. using an operation of WSDL port; using a java class;...

I submitted a document with more details on the problem area to issues@omg.org, without any response since weeks. I am happy to send this document to the person assigned to this issue, and discuss it.

• To "Table 8.80 - Interface attributes and model associations", add the following row:
  implementationRef: Element[0..1] This attribute allows to reference a concrete artifact in the underlying implementation technology representing that interface, such as
  a WSDL porttype.
• To "Table 8.81 - Operation attributes and model associations", add the following row:
  implementationRef: Element[0..1] This attribute allows to reference a concrete artifact in the underlying implementation technology representing that operation, such as
  a WSDL operation.
• Update the UML meta-model and XSD schema accordingly.
  Disposition: Resolved