The '< SVt_PVAV' entry looked to one reader like malformed HTML
rather than indicating a numerical range.
http://nntp.perl.org/group/perl.perl5.porters/252585
The most useful types that will be returned are:
- < SVt_PVAV Scalar
SVt_PVAV Array
SVt_PVHV Hash
SVt_PVCV Code
SVt_PVGV Glob (possibly a file handle)
+Any numerical value returned which is less than SVt_PVAV will be a scalar
+of some form.
+
See L<perlapi/svtype> for more details.
=head2 Blessed References and Class Objects