Comment 1 for bug 479470

This would actually be

(asdf:oos 'asdf:doc-op <target-system-name> :target-dir ...)

that is, the keyword arguments come after the system name (as you'd expect for a normal CL function).

Note that all those arguments get swept up into the :original-initargs slot of the test-op instance, and then propagated through dependent ops.

What this means is that :original-initargs can be used as an arbitrary property list on which to stash attributes that will modulate the performance of any ASDF operation.

I have used this for a number of extensions to asdf operation classes.