NAME

Wikibase::Datatype::Statement - Wikibase statement datatype.

SYNOPSIS

use Wikibase::Datatype::Statement;

my $obj = Wikibase::Datatype::Statement->new(%params);
my $id = $obj->id;
my $property_snaks_ar = $obj->property_snaks;
my $rank = $obj->rank;
my $referenes_ar = $obj->references;
my $snak = $obj->snak;

DESCRIPTION

This datatype is statement class for representing claim.

METHODS

new

my $obj = Wikibase::Datatype::Statement->new(%params);

Constructor.

Returns instance of object.

• id

  Id of statement. Parameter is optional.

• property_snaks

  Property snaks. Parameter is reference to hash with Wikibase::Datatype::Snak instances. Parameter is optional. Default value is [].

• rank

  Rank value. Parameter is string with these possible values: normal, preferred and deprecated Default value is 'normal'.

• references

  List of references. Parameter is reference to hash with Wikibase::Datatype::Reference instances. Parameter is optional. Default value is [].

• snak

  Main snak. Parameter is Wikibase::Datatype::Snak instance. Parameter is required.

id

my $id = $obj->id;

Get id of statement.

Returns string.

property_snaks

my $property_snaks_ar = $obj->property_snaks;

Get property snaks.

Returns reference to array with Wikibase::Datatype::Snak instances.

rank

my $rank = $obj->rank;

Get rank value.

references

my $referenes_ar = $obj->references;

Get references.

Returns reference to array with Wikibase::Datatype::Reference instance.

snak

my $snak = $obj->snak;

Get main snak.

Returns Wikibase::Datatype::Snak instance.

ERRORS

new():
        From Mo::utils::check_array_object():
                Parameter 'property_snaks' must be a array.
                Parameter 'references' must be a array.
                Property snak isn't 'Wikibase::Datatype::Snak' object.
                Reference isn't 'Wikibase::Datatype::Reference' object.
        From Mo::utils::check_isa():
                Parameter 'snak' must be a 'Wikibase::Datatype::Snak' object.
        From Mo::utils::check_required():
                Parameter 'snak' is required.
        Parameter 'rank' has bad value. Possible values are normal, preferred, deprecated.

EXAMPLE

use strict;
use warnings;

use Wikibase::Datatype::Reference;
use Wikibase::Datatype::Statement;
use Wikibase::Datatype::Snak;
use Wikibase::Datatype::Value::Item;
use Wikibase::Datatype::Value::String;
use Wikibase::Datatype::Value::Time;

# Object.
my $obj = Wikibase::Datatype::Statement->new(
        'id' => 'Q123$00C04D2A-49AF-40C2-9930-C551916887E8',

        # instance of (P31) human (Q5)
        'snak' => Wikibase::Datatype::Snak->new(
                 'datatype' => 'wikibase-item',
                 'datavalue' => Wikibase::Datatype::Value::Item->new(
                         'value' => 'Q5',
                 ),
                 'property' => 'P31',
        ),
        'property_snaks' => [
                # of (P642) alien (Q474741)
                Wikibase::Datatype::Snak->new(
                         'datatype' => 'wikibase-item',
                         'datavalue' => Wikibase::Datatype::Value::Item->new(
                                 'value' => 'Q474741',
                         ),
                         'property' => 'P642',
                ),
        ],
        'references' => [
                 Wikibase::Datatype::Reference->new(
                         'snaks' => [
                                 # stated in (P248) Virtual International Authority File (Q53919)
                                 Wikibase::Datatype::Snak->new(
                                          'datatype' => 'wikibase-item',
                                          'datavalue' => Wikibase::Datatype::Value::Item->new(
                                                  'value' => 'Q53919',
                                          ),
                                          'property' => 'P248',
                                 ),

                                 # VIAF ID (P214) 113230702
                                 Wikibase::Datatype::Snak->new(
                                          'datatype' => 'external-id',
                                          'datavalue' => Wikibase::Datatype::Value::String->new(
                                                  'value' => '113230702',
                                          ),
                                          'property' => 'P214',
                                 ),

                                 # retrieved (P813) 7 December 2013
                                 Wikibase::Datatype::Snak->new(
                                          'datatype' => 'time',
                                          'datavalue' => Wikibase::Datatype::Value::Time->new(
                                                  'value' => '+2013-12-07T00:00:00Z',
                                          ),
                                          'property' => 'P813',
                                 ),
                         ],
                 ),
        ],
);

# Print out.
print 'Id: '.$obj->id."\n";
print 'Claim: '.$obj->snak->property.' -> '.$obj->snak->datavalue->value."\n";
print "Qualifiers:\n";
foreach my $property_snak (@{$obj->property_snaks}) {
        print "\t".$property_snak->property.' -> '.
                $property_snak->datavalue->value."\n";
}
print "References:\n";
foreach my $reference (@{$obj->references}) {
        print "\tReference:\n";
        foreach my $reference_snak (@{$reference->snaks}) {
                print "\t\t".$reference_snak->property.' -> '.
                        $reference_snak->datavalue->value."\n";
        }
}
print 'Rank: '.$obj->rank."\n";

# Output:
# Id: Q123$00C04D2A-49AF-40C2-9930-C551916887E8
# Claim: P31 -> Q5
# Qualifiers:
#         P642 -> Q474741
# References:
#         Reference:
#                 P248 -> Q53919
#                 P214 -> 113230702
#                 P813 -> +2013-12-07T00:00:00Z
# Rank: normal

DEPENDENCIES

Error::Pure, List::MoreUtils, Mo, Mo::utils. Readonly.

SEE ALSO

Wikibase::Datatype

Wikibase datatypes.

REPOSITORY

https://github.com/michal-josef-spacek/Wikibase-Datatype

AUTHOR

Michal Josef Špaček mailto:skim@cpan.org

http://skim.cz

LICENSE AND COPYRIGHT

© 2020-2023 Michal Josef Špaček

BSD 2-Clause License

VERSION

0.33

cpanm Wikibase::Datatype

perl -MCPAN -e shell
install Wikibase::Datatype