Questions about YAML::XS

Hi,

I'm trying YAML::XS which is a binding of LibYAML for Perl.
I have some questions about YAML::XS (ver 0.26).

* 'null' is supported?
* 'yes', 'no', 'on', 'off' are supported?
* Date or timestamp is supported?
* Is it able to parse YAML stream?
* Is there any way to bind local tag to a certain data structure?


example code (ex.pl):
.--------------------
use strict;
use YAML::XS;
use Data::Dumper ();

my $input = <<END;
- [ ~, null ]
        # result: [undef, 'null']
- [ true, false, yes, no, on, off ]
        # result: [1, '', 'yes', 'no', 'on', 'off']
- 2008-01-01
        # result: '2008-01-01'
- 2008-01-01 12:34:56
        # result: '2008-01-01 12:34:56'
- &a1 { x: 10, y: 20 }
- <<: *a1
  z: 30
END
#my $ydoc = YAML::XS::Load($input);
my $ydoc = Load($input);
print Data::Dumper::Dumper($ydoc);
.--------------------


result:
.====================
$ perl ex.pl
$VAR1 = [
          [
            undef,
            'null'
          ],
          [
            1,
            '',
            'yes',
            'no',
            'on',
            'off'
          ],
          '2008-01-01',
          '2008-01-01 12:34:56'
          {
            'y' => '20',
            'x' => '10'
          },
          {
            '<<' => $VAR1->[4],
            'z' => '30'
          }
        ];
.====================


--
regards,
makoto kuwata

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