The async accessor allows you to issue an asynchronous subrequest when developing in DPML. However, if you are developing an accessor or using a scriping language you may find it easier to use the underlying asynchronous request methods in the NKF API.

The subrequest issued by async is built from the URI specified in the uri argument. All additional arguments are passed through as active URI arguments on the asynchronous subrequest.

The resulting resource returned by this request is not the result of the asynchronous subrequest since it may not be available yet. Instead, a request to async returns a handle which can be passed to the join accessor when you want to wait for the result.

A trailmap on asynchronous requests is here.