=head3 Version Strings
X<version string> X<vstring> X<v-string>
-B<Note:> Version Strings (v-strings) have been deprecated. They will
-be removed in some future release after Perl 5.8.1. The marginal
-benefits of v-strings were greatly outweighed by the potential for
-Surprise and Confusion.
-
A literal of the form C<v1.20.300.4000> is parsed as a string composed
of characters with the specified ordinals. This form, known as
v-strings, provides an alternative, more readable way to construct
"barewords". As with filehandles and labels, a bareword that consists
entirely of lowercase letters risks conflict with future reserved
words, and if you use the C<use warnings> pragma or the B<-w> switch,
-Perl will warn you about any
-such words. Some people may wish to outlaw barewords entirely. If you
+Perl will warn you about any such words. Perl limits barewords (like
+identifiers) to about 250 characters. Future versions of Perl are likely
+to eliminate these arbitrary limitations.
+
+Some people may wish to outlaw barewords entirely. If you
say
use strict 'subs';