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position: relative; float:right; margin-left: 1em; margin-bottom: 2em; width: 14em;"> <tr> <th> <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:User_manual" title="Help:User manual">SMW user manual</a> </th></tr> <tr> <td style="padding-right: 1em; padding-left: 1em;"> <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Introduction_to_Semantic_MediaWiki" title="Help:Introduction to Semantic MediaWiki">Introduction</a> </td></tr> <tr> <td style="padding-right: 1em; padding-left: 1em;"> <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Editing" title="Help:Editing">Editing</a> </td></tr> <tr> <td style="padding-right: 1em; padding-left: 2em; font-size: 95%;"> <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Properties_and_types" title="Help:Properties and types">Properties and types</a> </td></tr> <tr> <td style="padding-right: 1em; padding-left: 3em; font-size: 90%;"> <strong class="selflink">Special properties</strong> </td></tr> <tr> <td style="padding-right: 1em; padding-left: 3em; font-size: 90%;"> <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Inverse_properties" title="Help:Inverse properties">Inverse properties</a> </td></tr> <tr> <td style="padding-right: 1em; padding-left: 2em; font-size: 95%;"> <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Custom_units" title="Help:Custom units">Custom units</a> <p><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Semantic_templates" title="Help:Semantic templates">Semantic templates</a> </p><p><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Service_links" title="Help:Service links">Service links</a> </p> </td></tr> <tr> <td style="padding-right: 1em; padding-left: 1em;"> <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Browsing_interfaces" title="Help:Browsing interfaces">Browsing interfaces</a> </td></tr> <tr> <td style="padding-right: 1em; padding-left: 2em; font-size: 95%;"> <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special:Ask" title="Help:Special:Ask">Special:Ask</a> </td></tr> <tr> <td style="padding-right: 1em; padding-left: 2em; font-size: 95%;"> <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special:Browse" title="Help:Special:Browse">Special:Browse</a> </td></tr> <tr> <td style="padding-right: 1em; padding-left: 1em;"> <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Semantic_search" title="Help:Semantic search">Semantic search</a> </td></tr> <tr> <td style="padding-right: 1em; padding-left: 2em; font-size: 95%;"> <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Selecting_pages" title="Help:Selecting pages">Selecting pages</a> </td></tr> <tr> <td style="padding-right: 1em; padding-left: 3em; font-size: 90%;"> <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Strict_comparators" title="Help:Strict comparators">Strict comparators</a> </td></tr> <tr> <td style="padding-right: 1em; padding-left: 2em; font-size: 95%;"> <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Displaying_information" title="Help:Displaying information">Displaying information</a> </td></tr> <tr> <td style="padding-right: 1em; padding-left: 2em; font-size: 95%;"> <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Result_formats" title="Help:Result formats">Result formats</a> </td></tr> <tr> <td style="padding-right: 1em; padding-left: 2em; font-size: 95%;"> <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Inline_queries" title="Help:Inline queries">Inline queries</a> </td></tr> <tr> <td style="padding-right: 1em; padding-left: 3em; font-size: 90%;"> <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Querying_for_queries" title="Help:Querying for queries">Querying for queries</a> </td></tr> <tr> <td style="padding-right: 1em; padding-left: 2em; font-size: 95%;"> <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Concepts" title="Help:Concepts">Concepts</a> </td></tr> <tr> <td style="padding-right: 1em; padding-left: 2em; font-size: 95%;"> <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Inferencing" title="Help:Inferencing">Inferencing</a> </td></tr> <tr> <td style="padding-right: 1em; padding-left: 1em;"> <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Ask_API" title="Ask API" class="mw-redirect">Using the API</a> </td></tr> <tr> <td style="padding-right: 1em; padding-left: 1em;"> <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Semantic_Web" title="Help:Semantic Web">Semantic Web</a> </td></tr> <tr> <td style="padding-right: 1em; padding-left: 2em; font-size: 95%;"> <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:RDF_export" title="Help:RDF export">RDF export</a> <p><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Import_vocabulary" title="Help:Import vocabulary">Importing vocabulary</a> </p> </td></tr> <tr> <th> <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Administrator_manual" title="Help:Administrator manual">SMW admin manual</a> </th></tr> <tr> <th colspan="2" style="text-align: center; color: #0C2C52; background: #DCF0F7"> Table of Contents </th></tr> <tr> <td colspan="2" style="padding-top: 2px;"><div id="smworgtable-toc" style="font-size: 90%;"></div> </td></tr></table> <p>This page describes the <b>36 special properties</b> that are built-in to <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Semantic_MediaWiki" title="Semantic MediaWiki">Semantic MediaWiki</a> (SMW). They are needed to make the system work. They appear in a page's <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Browsing_interfaces#The_factbox" title="Help:Browsing interfaces">factbox</a>, on special page <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special:Properties" title="Help:Special:Properties">"Properties"</a> and on special page <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special:Browse" title="Help:Special:Browse">"Browse"</a> in italic. Since <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Semantic_MediaWiki_1.4.0" title="Semantic MediaWiki 1.4.0">Semantic MediaWiki 1.4.0</a>, special properties can be used in browsing interfaces and <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Inline_queries" title="Help:Inline queries">inline queries</a> just like all other properties. Also see the help page <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Properties_and_types#Special_properties" title="Help:Properties and types">Properties and types</a> for more information. </p><p>Special properties may also be provided by extensions to Semantic MediaWiki like, e.g. <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Extension:Semantic_Extra_Special_Properties" title="Extension:Semantic Extra Special Properties">Semantic Extra Special Properties</a> or <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Extension:Semantic_Cite" title="Extension:Semantic Cite">Sematic Cite</a>, etc. These however are currently not being documented here. </p><p>The names and aliases of special properties are reserved and cannot be used for other properties. Additionally special properties should only be used according to their documented purpose! It is not necessary to create pages for special properties. They will perform their special behaviour even if your wiki does not have a property page for it. </p><p>The pages listed in the table below provide an overview and link to documentation pages for 36 special properties: </p> <table class="sortable wikitable smwtable"><th class="Name">Name</th><th class="Description">Description</th><th class="Help-page">Help page</th><th class="Component">Component</th><th class="Since">Since</th><th class="Optional">Optional</th><th class="Label">Label</th><tr data-row-number="1" class="row-odd"><td class="Name smwtype_txt">Allows value</td><td class="Description smwtype_txt">Lists one permissible value for a property</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Allows_value" title="Help:Special property Allows value">Help:Special property "Allows value"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td data-sort-value="1.0" class="Since smwtype_txt">1.0</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="2" class="row-even"><td class="Name smwtype_txt">Corresponds to</td><td class="Description smwtype_txt">Gives the conversion factor for some unit of a physical quantity and the possible names for that unit</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Corresponds_to" title="Help:Special property Corresponds to">Help:Special property "Corresponds to"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td data-sort-value="1.0" class="Since smwtype_txt">1.0</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="3" class="row-odd"><td class="Name smwtype_txt">Display units</td><td class="Description smwtype_txt">Specifies the a comma-separated list of units or formats that a property should use in display</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Display_units" title="Help:Special property Display units">Help:Special property "Display units"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td data-sort-value="1.0" class="Since smwtype_txt">1.0</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="4" class="row-even"><td class="Name smwtype_txt">Equivalent URI</td><td class="Description smwtype_txt">Marks a page in the wiki as having a well-known meaning beyond this wiki, in an external URI</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Equivalent_URI" title="Help:Special property Equivalent URI">Help:Special property "Equivalent URI"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td data-sort-value="1.0" class="Since smwtype_txt">1.0</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="5" class="row-odd"><td class="Name smwtype_txt">Has type</td><td class="Description smwtype_txt">Assigns a datatype to a property</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Has_type" title="Help:Special property Has type">Help:Special property "Has type"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td data-sort-value="1.0" class="Since smwtype_txt">1.0</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="6" class="row-even"><td class="Name smwtype_txt">Imported from</td><td class="Description smwtype_txt">Allows users to reuse elements of external vocabularies directly within the wiki</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Imported_from" title="Help:Special property Imported from">Help:Special property "Imported from"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td data-sort-value="1.0" class="Since smwtype_txt">1.0</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="7" class="row-odd"><td class="Name smwtype_txt">Provides service</td><td class="Description smwtype_txt">Adds service links to properties</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Provides_service" title="Help:Special property Provides service">Help:Special property "Provides service"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td data-sort-value="1.0" class="Since smwtype_txt">1.0</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="8" class="row-even"><td class="Name smwtype_txt">Subproperty of</td><td class="Description smwtype_txt">Lets you indicate that one property is a subproperty of another</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Subproperty_of" title="Help:Special property Subproperty of">Help:Special property "Subproperty of"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td data-sort-value="1.0" class="Since smwtype_txt">1.0</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="9" class="row-odd"><td class="Name smwtype_txt">Modification date</td><td class="Description smwtype_txt">Holds a fixed value that corresponds to the date of the last modification of each page</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Modification_date" title="Help:Special property Modification date">Help:Special property "Modification date"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">1.4.0</td><td data-sort-value="1" class="Optional smwtype_boo">true</td><td class="Label smwtype_txt">_MDAT</td></tr><tr data-row-number="10" class="row-even"><td class="Name smwtype_txt">Has improper value for</td><td class="Description smwtype_txt">Alerts in case the assigned value to a property is invalid</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Has_improper_value_for" title="Help:Special property Has improper value for">Help:Special property "Has improper value for"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">1.4.2</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="11" class="row-odd"><td class="Name smwtype_txt">Has fields</td><td class="Description smwtype_txt">Defines a short list of fields with a fixed type and order for datatype Record</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Has_fields" title="Help:Special property Has fields">Help:Special property "Has fields"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">1.5.0</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="12" class="row-even"><td class="Name smwtype_txt">Subcategory of</td><td class="Description smwtype_txt">Lets you explicitly indicate that one category is a subcategory of another</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Subcategory_of" title="Help:Special property Subcategory of">Help:Special property "Subcategory of"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">1.5.0</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="13" class="row-odd"><td class="Name smwtype_txt">Creation date</td><td class="Description smwtype_txt">Holds a fixed value that corresponds to the date of the first revision of each page</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Creation_date" title="Help:Special property Creation date">Help:Special property "Creation date"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">1.7.0</td><td data-sort-value="1" class="Optional smwtype_boo">true</td><td class="Label smwtype_txt">_CDAT</td></tr><tr data-row-number="14" class="row-even"><td class="Name smwtype_txt">Has subobject</td><td class="Description smwtype_txt">Holds the subobjects set on a page</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Has_subobject" title="Help:Special property Has subobject">Help:Special property "Has subobject"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">1.7.0</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="15" class="row-odd"><td class="Name smwtype_txt">Is a new page</td><td class="Description smwtype_txt">Holds a value marking a page as being new or not</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Is_a_new_page" title="Help:Special property Is a new page">Help:Special property "Is a new page"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">1.7.1</td><td data-sort-value="1" class="Optional smwtype_boo">true</td><td class="Label smwtype_txt">_NEWP</td></tr><tr data-row-number="16" class="row-even"><td class="Name smwtype_txt">Last editor is</td><td class="Description smwtype_txt">Holds the page name of the user who created the last page revision</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Last_editor_is" title="Help:Special property Last editor is">Help:Special property "Last editor is"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">1.7.1</td><td data-sort-value="1" class="Optional smwtype_boo">true</td><td class="Label smwtype_txt">_LEDT</td></tr><tr data-row-number="17" class="row-odd"><td class="Name smwtype_txt">Has query</td><td class="Description smwtype_txt">Links a page to the subobject created by a query recording its profile</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Has_query" title="Help:Special property Has query">Help:Special property "Has query"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">1.8.0</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="18" class="row-even"><td class="Name smwtype_txt">Query depth</td><td class="Description smwtype_txt">Holds the value of the property depth of a query</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Query_depth" title="Help:Special property Query depth">Help:Special property "Query depth"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">1.8.0</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="19" class="row-odd"><td class="Name smwtype_txt">Query format</td><td class="Description smwtype_txt">Holds the name of the result format used in a query</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Query_format" title="Help:Special property Query format">Help:Special property "Query format"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">1.8.0</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="20" class="row-even"><td class="Name smwtype_txt">Query size</td><td class="Description smwtype_txt">Holds the value of the number of conditions in a query</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Query_size" title="Help:Special property Query size">Help:Special property "Query size"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">1.8.0</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="21" class="row-odd"><td class="Name smwtype_txt">Query string</td><td class="Description smwtype_txt">Holds the conditions of the query as a string</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Query_string" title="Help:Special property Query string">Help:Special property "Query string"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">1.8.0</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="22" class="row-even"><td class="Name smwtype_txt">Query duration</td><td class="Description smwtype_txt">Holds the value of the duration a query took to execute</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Query_duration" title="Help:Special property Query duration">Help:Special property "Query duration"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">1.9.0</td><td data-sort-value="1" class="Optional smwtype_boo">true</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="23" class="row-odd"><td class="Name smwtype_txt">MIME type</td><td class="Description smwtype_txt">Holds the MIME type of an uploaded file</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_MIME_type" title="Help:Special property MIME type">Help:Special property "MIME type"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">1.9.1</td><td data-sort-value="1" class="Optional smwtype_boo">true</td><td class="Label smwtype_txt">_MIME</td></tr><tr data-row-number="24" class="row-even"><td class="Name smwtype_txt">Media type</td><td class="Description smwtype_txt">Holds the Media type of an uploaded file</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Media_type" title="Help:Special property Media type">Help:Special property "Media type"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">1.9.1</td><td data-sort-value="1" class="Optional smwtype_boo">true</td><td class="Label smwtype_txt">_MEDIA</td></tr><tr data-row-number="25" class="row-odd"><td class="Name smwtype_txt">Allows pattern</td><td class="Description smwtype_txt">Pattern to match a permissible value</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Allows_pattern" title="Help:Special property Allows pattern">Help:Special property "Allows pattern"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">2.4.0</td><td data-sort-value="1" class="Optional smwtype_boo">true</td><td class="Label smwtype_txt">SMW_DV_PVAP</td></tr><tr data-row-number="26" class="row-even"><td class="Name smwtype_txt">Display precision of</td><td class="Description smwtype_txt">Precision in digits</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Display_precision_of" title="Help:Special property Display precision of">Help:Special property "Display precision of"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">2.4.0</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="27" class="row-odd"><td class="Name smwtype_txt">Display title of</td><td class="Description smwtype_txt">Holds a specific denote title for an entity</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Display_title_of" title="Help:Special property Display title of">Help:Special property "Display title of"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">2.4.0</td><td data-sort-value="1" class="Optional smwtype_boo">true</td><td class="Label smwtype_txt">_DTITLE</td></tr><tr data-row-number="28" class="row-even"><td class="Name smwtype_txt">Has processing error</td><td class="Description smwtype_txt">Holds a "container" with further information about a problem and allows to explore it.</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Has_processing_error" title="Help:Special property Has processing error">Help:Special property "Has processing error"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">2.4.0</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="29" class="row-odd"><td class="Name smwtype_txt">Has processing error text</td><td class="Description smwtype_txt">Contains a textual description of an error which occurred during the processing of a page.</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Has_processing_error_text" title="Help:Special property Has processing error text">Help:Special property "Has processing error text"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">2.4.0</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="30" class="row-even"><td class="Name smwtype_txt">Has property description</td><td class="Description smwtype_txt">Adds localizable context help to properties</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Has_property_description" title="Help:Special property Has property description">Help:Special property "Has property description"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">2.4.0</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="31" class="row-odd"><td class="Name smwtype_txt">Has uniqueness constraint</td><td class="Description smwtype_txt">Allows to restrict value annotation to be unique</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Has_uniqueness_constraint" title="Help:Special property Has uniqueness constraint">Help:Special property "Has uniqueness constraint"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">2.4.0</td><td data-sort-value="1" class="Optional smwtype_boo">true</td><td class="Label smwtype_txt">SMW_DV_PVUC</td></tr><tr data-row-number="32" class="row-even"><td class="Name smwtype_txt">Language code</td><td class="Description smwtype_txt">Handles BCP47 conform language codes specifying the language of the annotated text</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Language_code" title="Help:Special property Language code">Help:Special property "Language code"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">2.4.0</td><td data-sort-value="1" class="Optional smwtype_boo">true</td><td class="Label smwtype_txt">SMW_DV_MLTV_LCODE</td></tr><tr data-row-number="33" class="row-odd"><td class="Name smwtype_txt">Allows value list</td><td class="Description smwtype_txt">Adds a reference to a list of permissible values for a property</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Allows_value_list" title="Help:Special property Allows value list">Help:Special property "Allows value list"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">2.5.0</td><td data-sort-value="1" class="Optional smwtype_boo">true</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="34" class="row-even"><td class="Name smwtype_txt">Has preferred property label</td><td class="Description smwtype_txt">Adds localizable labels to a property</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Has_preferred_property_label" title="Help:Special property Has preferred property label">Help:Special property "Has preferred property label"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">2.5.0</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">_PPLB</td></tr><tr data-row-number="35" class="row-odd"><td class="Name smwtype_txt">Is edit protected</td><td class="Description smwtype_txt">Stores the status of an edit restriction of a page</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Is_edit_protected" title="Help:Special property Is edit protected">Help:Special property "Is edit protected"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">2.5.0</td><td data-sort-value="0" class="Optional smwtype_boo">false</td><td class="Label smwtype_txt">not specified</td></tr><tr data-row-number="36" class="row-even"><td class="Name smwtype_txt">Query parameters</td><td class="Description smwtype_txt">Holds the parameters a query used to select its output</td><td class="Help-page smwtype_wpg"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Query_parameters" title="Help:Special property Query parameters">Help:Special property "Query parameters"</a></td><td class="Component smwtype_txt">Semantic MediaWiki</td><td class="Since smwtype_txt">2.5.0</td><td data-sort-value="1" class="Optional smwtype_boo">true</td><td class="Label smwtype_txt">not specified</td></tr></table> <p><img alt="Note" src="/web/20170717000428im_/https://www.semantic-mediawiki.org/w/images/6/60/Bulbgraph.png" title="Note" width="18" height="22"/> <b>Note:</b>  Of the page related special properties, i.e. the ones that are marked as optional with "true" in the above list only special property "<a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_property_Modification_date" title="Help:Special property Modification date">Modification date</a>" is enabled by default. See the help page on the <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:$smwgPageSpecialProperties" title="Help:$smwgPageSpecialProperties"><tt>$smwgPageSpecialProperties</tt></a> configuration parameter for how to activate all or just a specific set of them. </p><p>You can create your own special properties in an extension using the <code>smwInitProperties</code> hook. See, for example, the usage in the <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Extension:Semantic_Extra_Special_Properties" title="Extension:Semantic Extra Special Properties">Semantic Extra Special Properties</a> extension, which provides extra special properties. </p><p>In case you would like to make special properties easier to be identified in the <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Browsing_interfaces#The_factbox" title="Help:Browsing interfaces">factbox</a>, on special pages <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special:Properties" title="Help:Special:Properties">"Properties"</a> and <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special:Browse" title="Help:Special:Browse">"Browse"</a> just add, e.g. the following CSS code to the <a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/MediaWiki:Common.css" title="MediaWiki:Common.css">MediaWiki:Common.css</a> page. </p> <div class="mw-highlight mw-content-ltr" dir="ltr"><pre><span class="nc">.smwbuiltin</span> <span class="nt">a</span><span class="o">,</span> <span class="nc">.smwbuiltin</span> <span class="nt">a</span><span class="nc">.new</span> <span class="p">{</span> <span class="nb">color</span><span class="o">:</span> <span class="m">#ff8000</span><span class="p">;</span> <span class="p">}</span> </pre></div> <p><img alt="Note" src="/web/20170717000428im_/https://www.semantic-mediawiki.org/w/images/6/60/Bulbgraph.png" title="Note" width="18" height="22"/> <b>Note:</b>  Special properties are are already printed in italics prior to the extra formatting mentioned here. </p><p><br/> </p> <div style="text-align: center; background: #F7F7F7; border: 4px solid #B0BFE8; padding: 0.5em; clear: both;"> <b>This documentation page applies to all SMW versions from 1.4.0 to the most current version.</b><div>       Other languages: <span style="text-transform: uppercase;" class="lang-de"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Spezialattribute" title="Help:Spezialattribute">de</a></span>, <span style="text-transform: uppercase;" class="lang-ru"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:%D0%A1%D0%BF%D0%B5%D1%86%D0%B8%D0%B0%D0%BB%D1%8C%D0%BD%D1%8B%D0%B5_%D1%81%D0%B2%D0%BE%D0%B9%D1%81%D1%82%D0%B2%D0%B0" title="Help:Специальные свойства">ru</a></span>, <span style="text-transform: uppercase;" class="lang-uk"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:Special_properties_(uk)" title="Help:Special properties (uk)">uk</a></span>, <span style="text-transform: uppercase;" class="lang-zh-hans"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Help:%E7%89%B9%E6%AE%8A%E5%B1%9E%E6%80%A7" title="Help:特殊属性">zh-hans</a></span></div></div><div style="display: none; read: none;"> <p><strong class="selflink">Help:Special properties</strong> en 1.4.0 </p> </div><br/>    </div> <div class="printfooter"> Retrieved from "<a dir="ltr" href="https://web.archive.org/web/20170717000428/https://www.semantic-mediawiki.org/w/index.php?title=Help:Special_properties&oldid=49322">https://www.semantic-mediawiki.org/w/index.php?title=Help:Special_properties&oldid=49322</a>" </div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Special:Categories" title="Special:Categories">Categories</a>: <ul><li><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Category:Special_properties" title="Category:Special properties">Special properties</a></li><li><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Category:Semantic_MediaWiki_documentation" title="Category:Semantic MediaWiki documentation">Semantic MediaWiki documentation</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Hidden categories: <ul><li><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Category:Effective_pages" title="Category:Effective pages">Effective pages</a></li><li><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Category:Metawiki" title="Category:Metawiki">Metawiki</a></li><li><a href="/web/20170717000428/https://www.semantic-mediawiki.org/wiki/Category:I18n_reference_page" title="Category:I18n reference page">I18n reference page</a></li></ul></div></div> <div class="visualClear"></div> </div> </div> <div id="mw-navigation"> <h2>Navigation menu</h2> <div id="mw-head"> <div id="p-personal" role="navigation" class="" aria-labelledby="p-personal-label"> <h3 id="p-personal-label">Personal tools</h3> <ul> <li id="pt-uls" class="active"><a href="#" class="uls-trigger autonym">English</a></li><li id="pt-login"><a href="/web/20170717000428/https://www.semantic-mediawiki.org/w/index.php?title=Special:UserLogin&returnto=Help%3ASpecial+properties" title="You are encouraged to log in; 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