NAME

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

SYNOPSIS

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;
# 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

© 2020-2025 Michal Josef Špaček

BSD 2-Clause License

VERSION

0.37