diff --git a/zx b/zx
index c01203e..46c2555 100755
--- a/zx
+++ b/zx
@@ -32,7 +32,7 @@
 -type state()           :: #s{}.
 %-type serial()          :: pos_integer().
 -type package_id()      :: {realm(), name(), version()}.
-%-type package()         :: {realm(), name()}.
+-type package()         :: {realm(), name()}.
 -type realm()           :: lower0_9().
 -type name()            :: lower0_9().
 -type version()         :: {Major :: non_neg_integer() | z,
@@ -306,9 +306,20 @@ ensure_installed(PackageID = {Realm, Name, Version}) ->
     end.
 
 
+-spec ensure_installed(Realm, Name, Version) -> Result
+    when Realm   :: realm(),
+         Name    :: name(),
+         Version :: version(),
+         Result  :: exact
+                  | {ok, version()}
+                  | not_found.
+%% @private
+%% Fetch and install the latest compatible version of the given package ID, whether
+%% the version indicator is complete, partial or blank.
+
 ensure_installed(Realm, Name, Version) ->
     Socket = connect_user(Realm),
-     case query_latest(Socket, {Realm, Name, Version}) of
+    case query_latest(Socket, {Realm, Name, Version}) of
         {ok, LatestVersion} ->
             LatestID = {Realm, Name, LatestVersion},
             ok = ensure_dep(Socket, LatestID),
@@ -329,6 +340,18 @@ ensure_installed(Realm, Name, Version) ->
     end.
 
 
+-spec query_latest(Socket, Object) -> Result
+    when Socket :: gen_tcp:socket(),
+         Object :: package() | package_id(),
+         Result :: {ok, version()}
+                 | {error, Reason},
+         Reason :: bad_realm
+                 | bad_package
+                 | bad_version.
+%% @private
+%% Queries the connected zomp node for the latest version of a package or package
+%% version (complete or incomplete version number).
+
 query_latest(Socket, {Realm, Name}) ->
     ok = send(Socket, {latest, Realm, Name}),
     receive
@@ -848,7 +871,7 @@ connect_user(Realm) ->
 
 connect_user(Realm, []) ->
     {Host, Port} = get_prime(Realm),
-    ok = log(info, "Realm host at ~ts:~tp", [inet:ntoa(Host), Port]),
+    ok = log(info, "Trying prime at ~ts:~tp", [inet:ntoa(Host), Port]),
     case gen_tcp:connect(Host, Port, connect_options(), 5000) of
         {ok, Socket} ->
             confirm_user(Realm, Socket, []);
@@ -857,6 +880,7 @@ connect_user(Realm, []) ->
             halt(0)
     end;
 connect_user(Realm, Hosts = [Node = {Host, Port} | Rest]) ->
+    ok = log(info, "Trying node at ~ts:~tp", [inet:ntoa(Host), Port]),
     case gen_tcp:connect(Host, Port, connect_options(), 5000) of
         {ok, Socket} ->
             confirm_user(Realm, Socket, Hosts);
@@ -1105,10 +1129,13 @@ realm_meta(Realm) ->
 
 prompt_keygen() ->
     Message =
-        "  Enter a name for your new keys.~n"
+        "~n  Enter a name for your new keys.~n~n"
         "  Valid names must start with a lower-case letter, and can include~n"
         "  only lower-case letters, numbers, and periods, but no series of~n"
-        "  consecutive periods.~n",
+        "  consecutive periods. (That is: [a-z0-9\\.])~n~n"
+        "  To designate the key as realm-specific, enter the realm name and~n"
+        "  key name separated by a space.~n~n"
+        "    Example: some.realm my.key~n",
     ok = io:format(Message),
     Input = string:trim(io:get_line("(^C to quit): ")),
     {Realm, KeyName} =
@@ -1136,10 +1163,8 @@ keygen() ->
     ok = file:set_cwd(zomp_dir()),
     KeyID = prompt_keygen(),
     case generate_rsa(KeyID) of
-        ok ->
-            halt(0);
-        Error ->
-            error_exit("keygen failed with ~tp", [Error], ?FILE, ?LINE)
+        ok    -> halt(0);
+        Error -> error_exit("keygen failed with ~tp", [Error], ?FILE, ?LINE)
     end.
 
 
@@ -1733,10 +1758,12 @@ package_id(String) ->
             true = valid_lower0_9(Name),
             Version = string_to_version(VersionString),
             {Realm, Name, Version};
-        [Realm, Name] ->
-            true = valid_lower0_9(Realm),
-            true = valid_lower0_9(Name),
-            {Realm, Name, {z, z, z}};
+        [A, B] ->
+            true = valid_lower0_9(A),
+            case valid_lower0_9(B) of
+                true  -> {A, B, {z, z, z}};
+                false -> {"otpr", A, string_to_version(B)}
+            end;
         [Name] ->
             true = valid_lower0_9(Name),
             {"otpr", Name, {z, z, z}}