[cddlm] Doubt about "Resolve" operation on System

Hello all, we are implementing the "Resolve" operation from the System and we had the following doubts: 1. What should happen if in the "path" we specify a prefix, but in the CDL being queried that prefix is not defined? As far as we know, XPath does not support queries using namespaces, only prefixes. Considering this, the prefix used must be defined on the XML being queried. Are we right? 2. What must happen when the "path" passed for the "Resolve" does not present a prefix? We think that in this case, a response representing an emply result should be returned to the user. Ok? Thanks, Ourgrid team.