References to keys defined in the maps. Keys in the root map:
- Key A: 1.dita (Should resolve. Normal keydef bound to a topic)
- Key B: (Should resolve as @keys attribute conreffing element should override @keys on conref target.
- Key C: (Should not resolve as keydef for "C" is overridden by conref of parent.
- Key D: (Should resolve but topicref is to another topicref, not to a topic. Should be a link to navigation)
- Key E: 3.dita (Should resolve, keydef is child of effective key definition).