Metadata parameters for adapter services use the same model that connections use (as described in webMethods Metadata Parameters). However, the restriction on sequence parameters (arrays) does not apply to adapter services. The Adapter Service Editor supports widgets that allow adapter users to view and manipulate array values in several ways, as described in the next section.

It is important to note that providing default values to parameters through a "get" method is not as valuable in the context of adapter services. This functionality is largely replaced by the use of resource domains. Some functionality, such as the specification of the run time signature of the service, requires values to be provided through the resource domain facilities. For more information, see Resource Domains.