When searching a namespace for an RPC interface and object, a client supplies the name of the directory service entry where the search begins. The entry can be a server entry, group, or profile. Generally, an NSI search starts with a group or profile. The group or profile defines a search path that ends at a server entry containing the requested interface identifier, object UUID, and compatible binding information.
A user may know in advance what server instance to use. In this case, starting with a server entry for the server instance is appropriate.