+With the following variant of @code{!analyze_kw}, the variables must
+be following by @samp{/}:
+
+@example
+DEFINE !analyze_parens(vars=!CHARNED('/'))
+DESCRIPTIVES !vars.
+FREQUENCIES /VARIABLES=!vars.
+!ENDDEFINE.
+
+!analyze_parens vars=v1 v2 v3/.
+@end example
+