+Make valgrind --leak-check=yes --show-reachable=yes work.
+
+Add Boolean type.
+
+Add NOT_REACHED() macro.
+
+Add compression to casefiles.
+
+Expressions need to be able to abbreviate function names. XDATE.QUARTER
+abbreviates to XDA.QUA, etc.
+
+The expression tests need tests for XDATE and a few others, see
+tests/xforms/expressions.sh comments for details.
+
+Expressions need random distribution functions.
+