+/* Distinguishable categories of encodings.
+
+ This list determines the initial priority of the categories.
+
+ For better or worse, currently Mule files are encoded in 7-bit ISO 2022.
+ For this reason, under Mule ISO_7 gets highest priority.
+
+ Putting NO_CONVERSION second prevents "binary corruption" in the
+ default case in all but the (presumably) extremely rare case of a
+ binary file which contains redundant escape sequences but no 8-bit
+ characters.
+
+ The remaining priorities are based on perceived "internationalization
+ political correctness." An exception is UCS-4 at the bottom, since
+ basically everything is compatible with UCS-4, but it is likely to
+ be very rare as an external encoding. */
+