1) I suppose there's a bug in \prop_map_function_aux:NNn.
   Here is the diff:

--- l3prop.dtx.orig     2006-12-12 13:28:27.000000000 +0100
+++ l3prop.dtx  2007-05-05 22:04:43.000000000 +0200
@@ -665,7 +665,7 @@
     \exp_after:NN #2 \prop_use:N #1 \q_nil \q_no_value \q_stop
 }
 \def_new:Npn \prop_map_function_aux:NNn #1#2#3{
-  \if_meaning:NN \q_nil #1
+  \if_meaning:NN \q_nil #2
     \exp_after:NN \prop_map_break:w
   \fi:
   #1#2{#3}



2) I have no idea how to use \prop_map_inline:NN. Can someone
   show me? There seems to be a missing \prop_map_function:N.


Ciao
Andreas