+##
+# The order below is important. The initial flow field depends on whether
+# --script or top mode is used. In top mode, the expected behavior, in_port
+# flow fields are shown first. A future feature will allow users to
+# filter output by selecting a row. Filtering by in_port is a natural
+# filtering starting point.
+#
+# In script mode, all fields are shown. The expectation is that users could
+# filter output by piping through grep.
+#
+# In top mode, the default flow field is in_port. In --script mode,
+# the default flow field is all.
+#
+# All is added to the end of the OUTPUT_FORMAT list.
+##