For information on converting to InterSystems IRIS, see the
InterSystems IRIS Adoption Guide
and the InterSystems IRIS In-Place Conversion Guide,
both available on the WRC Distributions page (login required).
Called from client to get the interface for the given host item.
This picks up the possible request & response classes as well as the
the set of properties in the default request and response.
pRequest and pResponse are the current selected types.
Given a production and host name return its *interface*; that
is the set of properties defined by its request and response classes.
Inputs and outputs are returned as a serialized list in the form:
If pRequestClass is non-"", then use it to find the desired
response, else return the first response.
If type is %String, it is omitted to save space.