function is the wide-character equivalent of the
.BR islower (3)
function.
-It tests whether \fIwc\fP is a wide character
+It tests whether
+.I wc
+is a wide character
belonging to the wide-character class "lower".
.PP
The wide-character class "lower" is a subclass of the wide-character class
"lower" is disjoint from the wide-character class "digit".
.PP
The wide-character class "lower" contains at least
-those characters \fIwc\fP
-which are equal to \fItowlower(wc)\fP and different
-from \fItowupper(wc)\fP.
+those characters
+.I wc
+which are equal to
+.I towlower(wc)
+and different from
+.IR towupper(wc) .
.PP
The wide-character class "lower" always contains
at least the letters \(aqa\(aq to \(aqz\(aq.
The
.BR iswlower ()
function returns nonzero
-if \fIwc\fP is a wide character
+if
+.I wc
+is a wide character
belonging to the wide-character class "lower".
Otherwise it returns zero.
.SH CONFORMING TO