NAME

Wikibase::Datatype::Item - Wikibase item datatype.

SYNOPSIS

 use Wikibase::Datatype::Item;

 my $obj = Wikibase::Datatype::Item->new(%params);
 my $aliases_ar = $obj->aliases;
 my $descriptions_ar = $obj->descriptions;
 my $id = $obj->id;
 my $labels_ar = $obj->labels;
 my $lastrevid = $obj->lastrevid;
 my $modified = $obj->modified;
 my $ns = $obj->ns;
 my $page_id = $obj->page_id;
 my $sitelinks_ar = $obj->sitelinks;
 my $statements_ar = $obj->statements;
 my $title = $obj->title;

DESCRIPTION

This datatype is item class for representing claim.

METHODS

`new`

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

Constructor.

Returns instance of object.

aliases

Item aliases. Multiple per language. Reference to array with Wikibase::Datatype::Value::Monolingual instances. Parameter is optional.
descriptions

Item descriptions. One per language. Reference to array with Wikibase::Datatype::Value::Monolingual instances. Parameter is optional.
id

Id. Parameter is optional.
labels

Item descriptions. One per language. Check length of string (250) and strip it if it's longer. Reference to array with Wikibase::Datatype::Value::Monolingual instances. Parameter is optional.
lastrevid

Last revision ID. Parameter is optional.
modified

Date of modification. Parameter is optional.
ns

Namespace. Default value is 0.
page_id

Page id. Numeric value. Parameter is optional.
sitelinks

Item sitelinks. One per site. Reference to array with Wikibase::Datatype::Sitelink instances. Parameter is optional.
statements

Item statements. Reference to array with Wikibase::Datatype::Statement instances. Parameter is optional.
title

Item title. Parameter is optional.

`aliases`

 my $aliases_ar = $obj->aliases;

Get aliases.

Returns reference to array with Wikibase::Datatype::Value::Monolingual instances.

`descriptions`

 my $descriptions_ar = $obj->descriptions;

Get descriptions.

Returns reference to array with Wikibase::Datatype::Value::Monolingual instances.

`id`

 my $id = $obj->id;

Get id.

Returns string.

`labels`

 my $labels_ar = $obj->labels;

Get labels.

Returns reference to array with Wikibase::Datatype::Value::Monolingual instances.

`lastrevid`

 my $lastrevid = $obj->lastrevid;

Get last revision ID.

Returns string.

`modified`

 my $modified = $obj->modified;

Get date of modification.

Returns string.

`ns`

 my $ns = $obj->ns;

Get namespace.

Returns number.

`page_id`

 my $page_id = $obj->page_id;

Get page id.

Returns number.

`sitelinks`

 my $sitelinks_ar = $obj->sitelinks;

Get sitelinks.

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

`statements`

 my $statements_ar = $obj->statements;

Get statements.

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

`title`

 my $title = $obj->title;

Get title.

Returns string.

ERRORS

 new():
         From Mo::utils::check_array_object():
                 Alias isn't 'Wikibase::Datatype::Value::Monolingual' object.
                 Description isn't 'Wikibase::Datatype::Value::Monolingual' object.
                 Label isn't 'Wikibase::Datatype::Value::Monolingual' object.
                 Parameter 'aliases' must be a array.
                 Parameter 'descriptions' must be a array.
                 Parameter 'labels' must be a array.
                 Parameter 'sitelinks' must be a array.
                 Parameter 'statements' must be a array.
                 Sitelink isn't 'Wikibase::Datatype::Sitelink' object.
                 Statement isn't 'Wikibase::Datatype::Statement' object.
         From Mo::utils::check_page_id():
                 Parameter 'page_id' must a number.
         From Mo::utils::check_number_of_items():
                 Sitelink for site '%s' has multiple values.
                 Description for language '%s' has multiple values.
                 Label for language '%s' has multiple values.

EXAMPLE

 use strict;
 use warnings;

 use Unicode::UTF8 qw(decode_utf8 encode_utf8);
 use Wikibase::Datatype::Item;
 use Wikibase::Datatype::Reference;
 use Wikibase::Datatype::Sitelink;
 use Wikibase::Datatype::Snak;
 use Wikibase::Datatype::Statement;
 use Wikibase::Datatype::Value::Item;
 use Wikibase::Datatype::Value::Monolingual;
 use Wikibase::Datatype::Value::String;
 use Wikibase::Datatype::Value::Time;

 # Statements.
 my $statement1 = Wikibase::Datatype::Statement->new(
         # 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',
                                 ),
                         ],
                 ),
         ],
 );
 my $statement2 = Wikibase::Datatype::Statement->new(
         # sex or gender (P21) male (Q6581097)
         'snak' => Wikibase::Datatype::Snak->new(
                 'datatype' => 'wikibase-item',
                 'datavalue' => Wikibase::Datatype::Value::Item->new(
                         'value' => 'Q6581097',
                 ),
                 'property' => 'P21',
         ),
         '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',
                                 ),
                         ],
                 ),
         ],
 );

 # Main item.
 my $obj = Wikibase::Datatype::Item->new(
         'aliases' => [
                 Wikibase::Datatype::Value::Monolingual->new(
                         'language' => 'cs',
                         'value' => decode_utf8('Douglas Noël Adams'),
                 ),
                 Wikibase::Datatype::Value::Monolingual->new(
                         'language' => 'cs',
                         'value' => 'Douglas Noel Adams',
                 ),
                 Wikibase::Datatype::Value::Monolingual->new(
                         'language' => 'cs',
                         'value' => 'Douglas N. Adams',
                 ),
                 Wikibase::Datatype::Value::Monolingual->new(
                         'language' => 'en',
                         'value' => 'Douglas Noel Adams',
                 ),
                 Wikibase::Datatype::Value::Monolingual->new(
                         'language' => 'en',
                         'value' => decode_utf8('Douglas Noël Adams'),
                 ),
                 Wikibase::Datatype::Value::Monolingual->new(
                         'language' => 'en',
                         'value' => 'Douglas N. Adams',
                 ),
         ],
         'descriptions' => [
                 Wikibase::Datatype::Value::Monolingual->new(
                         'language' => 'cs',
                         'value' => decode_utf8('anglický spisovatel, humorista a dramatik'),
                 ),
                 Wikibase::Datatype::Value::Monolingual->new(
                         'language' => 'en',
                         'value' => 'English writer and humorist',
                 ),
         ],
         'id' => 'Q42',
         'labels' => [
                 Wikibase::Datatype::Value::Monolingual->new(
                         'language' => 'cs',
                         'value' => 'Douglas Adams',
                 ),
                 Wikibase::Datatype::Value::Monolingual->new(
                         'language' => 'en',
                         'value' => 'Douglas Adams',
                 ),
         ],
         'page_id' => 123,
         'sitelinks' => [
                 Wikibase::Datatype::Sitelink->new(
                         'site' => 'cswiki',
                         'title' => 'Douglas Adams',
                 ),
                 Wikibase::Datatype::Sitelink->new(
                         'site' => 'enwiki',
                         'title' => 'Douglas Adams',
                 ),
         ],
         'statements' => [
                 $statement1,
                 $statement2,
         ],
         'title' => 'Q42',
 );

 # Print out.
 print "Title: ".$obj->title."\n";
 print 'Id: '.$obj->id."\n";
 print 'Page id: '.$obj->page_id."\n";
 print "Labels:\n";
 foreach my $label (sort { $a->language cmp $b->language } @{$obj->labels}) {
         print "\t".encode_utf8($label->value).' ('.$label->language.")\n";
 }
 print "Descriptions:\n";
 foreach my $desc (sort { $a->language cmp $b->language } @{$obj->descriptions}) {
         print "\t".encode_utf8($desc->value).' ('.$desc->language.")\n";
 }
 print "Aliases:\n";
 foreach my $alias (sort { $a->language cmp $b->language } @{$obj->aliases}) {
         print "\t".encode_utf8($alias->value).' ('.$alias->language.")\n";
 }
 print "Sitelinks:\n";
 foreach my $sitelink (@{$obj->sitelinks}) {
         print "\t".$sitelink->title.' ('.$sitelink->site.")\n";
 }
 print "Statements:\n";
 foreach my $statement (@{$obj->statements}) {
         print "\tStatement:\n";
         print "\t\t".$statement->snak->property.' -> '.$statement->snak->datavalue->value."\n";
         print "\t\tQualifers:\n";
         foreach my $property_snak (@{$statement->property_snaks}) {
                 print "\t\t\t".$property_snak->property.' -> '.
                         $property_snak->datavalue->value."\n";
         }
         print "\t\tReferences:\n";
         foreach my $reference (@{$statement->references}) {
                 print "\t\t\tReference:\n";
                 foreach my $reference_snak (@{$reference->snaks}) {
                         print "\t\t\t".$reference_snak->property.' -> '.
                                 $reference_snak->datavalue->value."\n";
                 }
         }
 }

 # Output:
 # Title: Q42
 # Id: Q42
 # Page id: 123
 # Labels:
 #         Douglas Adams (cs)
 #         Douglas Adams (en)
 # Descriptions:
 #         anglický spisovatel, humorista a dramatik (cs)
 #         English writer and humorist (en)
 # Aliases:
 #         Douglas Noël Adams (cs)
 #         Douglas Noel Adams (cs)
 #         Douglas N. Adams (cs)
 #         Douglas Noel Adams (en)
 #         Douglas Noël Adams (en)
 #         Douglas N. Adams (en)
 # Sitelinks:
 #         Douglas Adams (cswiki)
 #         Douglas Adams (enwiki)
 # Statements:
 #         Statement:
 #                 P31 -> Q5
 #                 Qualifers:
 #                         P642 -> Q474741
 #                 References:
 #                         Reference:
 #                         P248 -> Q53919
 #                         P214 -> 113230702
 #                         P813 -> +2013-12-07T00:00:00Z
 #         Statement:
 #                 P21 -> Q6581097
 #                 Qualifers:
 #                 References:
 #                         Reference:
 #                         P248 -> Q53919
 #                         P214 -> 113230702
 #                         P813 -> +2013-12-07T00:00:00Z

DEPENDENCIES

Error::Pure, Mo, Mo:utils.

REPOSITORY

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

AUTHOR

Michal Josef Špaček mailto:skim@cpan.org

http://skim.cz

LICENSE AND COPYRIGHT

BSD 2-Clause License

VERSION

0.31

To install Wikibase::Datatype, copy and paste the appropriate command in to your terminal.

cpanm

cpanm Wikibase::Datatype

CPAN shell

perl -MCPAN -e shell
install Wikibase::Datatype

For more information on module installation, please visit the detailed CPAN module installation guide.

	Global
`s`	Focus search bar
`?`	Bring up this help dialog

	GitHub
`g` `p`	Go to pull requests
`g` `i`	go to github issues (only if github is preferred repository)

	POD
`g` `a`	Go to author
`g` `c`	Go to changes
`g` `i`	Go to issues
`g` `d`	Go to dist
`g` `r`	Go to repository/SCM
`g` `s`	Go to source
`g` `b`	Go to file browse

	Search terms
module: (e.g. module:Plugin)
distribution: (e.g. distribution:Dancer auth)
author: (e.g. author:SONGMU Redis)
version: (e.g. version:1.00)

NAME

SYNOPSIS

DESCRIPTION

METHODS

new

aliases

descriptions

id

labels

lastrevid

modified

ns

page_id

sitelinks

statements

title

ERRORS

EXAMPLE

DEPENDENCIES

SEE ALSO

REPOSITORY

AUTHOR

LICENSE AND COPYRIGHT

VERSION

Module Install Instructions

`new`

`aliases`

`descriptions`

`id`

`labels`

`lastrevid`

`modified`

`ns`

`page_id`

`sitelinks`

`statements`

`title`