-# bar@uptodate:=1
-# Set when Mage makes a file or depends on it being made. Used to determine
-# the next prerequisite to check for a dependency-logging command.
+# bar@checked:=1
+# Set when Mage determines that a file is up to date or depends on it being
+# so determined. Used to decide which prerequisite to check next for a
+# dependency-logging command.
+#
+# bar@dlc-ran:=1
+# Indicates that Mage is in the middle of building bar using a dependency-
+# logging command. Means that bar.g.tmp, not bar.g, is the most current
+# genfile.