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info URI scheme - Wikipedia
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class="firstHeading mw-first-heading">info URI scheme</h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="This article exist only in this language. 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mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="More options" > <div class="vector-menu-heading"> Actions </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Info_URI_scheme"><span>Read</span></a></li><li id="ca-more-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Info_URI_scheme&action=edit" title="Edit this page [e]" accesskey="e"><span>Edit</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Info_URI_scheme&action=history"><span>View history</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> General </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Special:WhatLinksHere/Info_URI_scheme" title="List of all English Wikipedia pages containing links to this page [j]" accesskey="j"><span>What links here</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Special:RecentChangesLinked/Info_URI_scheme" rel="nofollow" title="Recent changes in pages linked from this page [k]" accesskey="k"><span>Related changes</span></a></li><li id="t-upload" class="mw-list-item"><a href="/wiki/Wikipedia:File_Upload_Wizard" title="Upload files [u]" accesskey="u"><span>Upload file</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Special:SpecialPages" title="A list of all special pages [q]" accesskey="q"><span>Special pages</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Info_URI_scheme&oldid=1154881230" title="Permanent link to this revision of this page"><span>Permanent link</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Info_URI_scheme&action=info" title="More information about this page"><span>Page information</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Special:CiteThisPage&page=Info_URI_scheme&id=1154881230&wpFormIdentifier=titleform" title="Information on how to cite this page"><span>Cite this page</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Special:UrlShortener&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FInfo_URI_scheme"><span>Get shortened URL</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Special:QrCode&url=https%3A%2F%2Fen.wikipedia.org%2Fwiki%2FInfo_URI_scheme"><span>Download QR code</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Print/export </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Special:DownloadAsPdf&page=Info_URI_scheme&action=show-download-screen" title="Download this page as a PDF file"><span>Download as PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Info_URI_scheme&printable=yes" title="Printable version of this page [p]" accesskey="p"><span>Printable version</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> In other projects </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q6030413" title="Structured data on this page hosted by Wikidata [g]" accesskey="g"><span>Wikidata item</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Appearance</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">move to sidebar</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">hide</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><p>In computing, <b>info</b> is a <a href="/wiki/Uniform_Resource_Identifier" title="Uniform Resource Identifier">Uniform Resource Identifier</a> (URI) scheme which enables identifiers from public namespaces to be represented as URIs, when they would otherwise have no canonical URL form, such as <a href="/wiki/Library_of_Congress" title="Library of Congress">Library of Congress</a> identifiers, <a href="/wiki/Handle_System" title="Handle System">Handle System</a> handles, and <a href="/wiki/Digital_object_identifier" title="Digital object identifier">Digital object identifiers</a>. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Specification">Specification</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Info_URI_scheme&action=edit&section=1" title="Edit section: Specification"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The specification for the info scheme is provided by the Informational RFC 4452.<sup id="cite_ref-rfc4452_1-0" class="reference"><a href="#cite_note-rfc4452-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Example">Example</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Info_URI_scheme&action=edit&section=2" title="Edit section: Example"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The following is an example of an info URI: </p> <dl><dd><code>info:ddc/22/eng//004.678</code></dd></dl> <p>In this example, "ddc" designates the <a href="/wiki/Dewey_Decimal_Classification" title="Dewey Decimal Classification">Dewey Decimal Classification</a> namespace and "22/eng//004.678" is the identifier within that namespace. </p> <div class="mw-heading mw-heading2"><h2 id="Namespace_registry">Namespace registry</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Info_URI_scheme&action=edit&section=3" title="Edit section: Namespace registry"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Between 2003 and 2010, info namespaces were registered by the <a href="/wiki/Online_Computer_Library_Center" class="mw-redirect" title="Online Computer Library Center">Online Computer Library Center</a> (OCLC) Office of Research on behalf of the <a href="/wiki/National_Information_Standards_Organization" title="National Information Standards Organization">National Information Standards Organization</a> (NISO), an American library standards body. About 30 namespaces were registered.<sup id="cite_ref-OAI_DC_2-0" class="reference"><a href="#cite_note-OAI_DC-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p><p>In 2010, the registry was closed, in view of the increasing importance of the <a href="/wiki/W3C" class="mw-redirect" title="W3C">W3C</a> <a href="/wiki/Linked_Data" class="mw-redirect" title="Linked Data">Linked Data</a> paradigm, and adopters of the info scheme were advised to migrate resource identity requirements towards "mainstream Web practices."<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Info_URI_scheme&action=edit&section=4" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-rfc4452-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-rfc4452_1-0">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation news cs1"><a rel="nofollow" class="external text" href="https://tools.ietf.org/html/rfc4452">"The "info" URI Scheme for Information Assets with Identifiers in Public Namespaces"</a>. <a href="/wiki/Internet_Engineering_Task_Force" title="Internet Engineering Task Force">Internet Engineering Task Force</a> Network Working Group. 7 April 2006<span class="reference-accessdate">. Retrieved <span class="nowrap">2008-09-15</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.atitle=The+%22info%22+URI+Scheme+for+Information+Assets+with+Identifiers+in+Public+Namespaces&rft.date=2006-04-07&rft_id=https%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc4452&rfr_id=info%3Asid%2Fen.wikipedia.org%3AInfo+URI+scheme" class="Z3988"></span></span> </li> <li id="cite_note-OAI_DC-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-OAI_DC_2-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20200814102317/http://info-uri.info/registry/OAIHandler?verb=ListRecords&metadataPrefix=oai_dc">"<span class="cs1-kern-left"></span>"info" URI Scheme"</a>. <i>info-uri.info</i>. Archived from <a rel="nofollow" class="external text" href="http://info-uri.info/registry/OAIHandler?verb=ListRecords&metadataPrefix=oai_dc">the original</a> on 2020-08-14<span class="reference-accessdate">. Retrieved <span class="nowrap">2015-10-31</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=info-uri.info&rft.atitle=%22info%22+URI+Scheme&rft_id=http%3A%2F%2Finfo-uri.info%2Fregistry%2FOAIHandler%3Fverb%3DListRecords%26metadataPrefix%3Doai_dc&rfr_id=info%3Asid%2Fen.wikipedia.org%3AInfo+URI+scheme" class="Z3988"></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-3">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://info-uri.info">"Notice"</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Notice&rft_id=http%3A%2F%2Finfo-uri.info&rfr_id=info%3Asid%2Fen.wikipedia.org%3AInfo+URI+scheme" class="Z3988"></span></span> </li> </ol></div></div> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol ol,.mw-parser-output .hlist ol ul,.mw-parser-output .hlist ul dl,.mw-parser-output .hlist ul ol,.mw-parser-output .hlist ul ul{display:inline}.mw-parser-output .hlist .mw-empty-li{display:none}.mw-parser-output .hlist dt::after{content:": "}.mw-parser-output .hlist dd::after,.mw-parser-output .hlist li::after{content:" · ";font-weight:bold}.mw-parser-output .hlist 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.navbox-even{background-color:#f7f7f7}.mw-parser-output .navbox-odd{background-color:transparent}.mw-parser-output .navbox .hlist td dl,.mw-parser-output .navbox .hlist td ol,.mw-parser-output .navbox .hlist td ul,.mw-parser-output .navbox td.hlist dl,.mw-parser-output .navbox td.hlist ol,.mw-parser-output .navbox td.hlist ul{padding:0.125em 0}.mw-parser-output .navbox .navbar{display:block;font-size:100%}.mw-parser-output .navbox-title .navbar{float:left;text-align:left;margin-right:0.5em}body.skin--responsive .mw-parser-output .navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}</style></div><div role="navigation" class="navbox" aria-labelledby="Uniform_Resource_Identifier_(URI)_schemes" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link 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li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:URI_schemes" title="Template:URI schemes"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:URI_schemes" title="Template talk:URI schemes"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:URI_schemes" title="Special:EditPage/Template:URI schemes"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Uniform_Resource_Identifier_(URI)_schemes" style="font-size:114%;margin:0 4em"><a href="/wiki/List_of_URI_schemes" title="List of URI schemes">Uniform Resource Identifier (URI) schemes</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Official</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/About_URI_scheme" title="About URI scheme">about</a></li> <li><a href="/wiki/Acct_URI_scheme" title="Acct URI scheme">acct</a></li> <li><a href="/wiki/Content_reference_identifier" title="Content reference identifier">crid</a></li> <li><a href="/wiki/Data_URI_scheme" title="Data URI scheme">data</a></li> <li><a href="/wiki/File_URI_scheme" title="File URI scheme">file</a></li> <li><a href="/wiki/File_Transfer_Protocol" title="File Transfer Protocol">ftp</a></li> <li><a href="/wiki/Geo_URI_scheme" title="Geo URI scheme">geo</a></li> <li><a href="/wiki/Gopher_(protocol)" title="Gopher (protocol)">gopher</a></li> <li><a href="/wiki/HTTP#Technical_overview" title="HTTP">http</a></li> <li><a href="/wiki/HTTPS" title="HTTPS">https</a></li> <li><a class="mw-selflink 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style="width:1%">Unofficial</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Hyper_Text_Coffee_Pot_Control_Protocol#Commands_and_replies" title="Hyper Text Coffee Pot Control Protocol">coffee</a></li> <li><a href="/wiki/Ed2k_URI_scheme" title="Ed2k URI scheme">ed2k</a></li> <li><a href="/wiki/Gemini_(protocol)" title="Gemini (protocol)">gemini</a></li> <li><a href="/wiki/Feed_URI_scheme" title="Feed URI scheme">feed</a></li> <li><a href="/wiki/Finger_(protocol)" title="Finger (protocol)">finger</a></li> <li><a href="/wiki/Internet_Relay_Chat#URI_scheme" class="mw-redirect" title="Internet Relay Chat">irc / irc6 / ircs</a></li> <li><a href="/wiki/Lightweight_Directory_Access_Protocol#URI_scheme" title="Lightweight Directory Access Protocol">ldaps</a></li> <li><a href="/wiki/Magnet_URI_scheme" title="Magnet URI scheme">magnet</a></li> <li><a href="/wiki/Rsync" title="Rsync">rsync</a></li> <li><a href="/wiki/Yahoo!_Messenger#URI_scheme" class="mw-redirect" title="Yahoo! Messenger">ymsgr</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div><a href="/wiki/List_of_network_protocols_(OSI_model)" title="List of network protocols (OSI model)">Protocol list</a></div></td></tr></tbody></table></div> <!-- NewPP limit report Parsed by mw‐api‐ext.codfw.main‐5d6cbfccfb‐m8bxn Cached time: 20241117090250 Cache expiry: 2592000 Reduced expiry: false Complications: [vary‐revision‐sha1, show‐toc] CPU time usage: 0.195 seconds Real time usage: 0.252 seconds Preprocessor visited node count: 273/1000000 Post‐expand include size: 12029/2097152 bytes Template argument size: 110/2097152 bytes Highest expansion depth: 8/100 Expensive parser function count: 1/500 Unstrip recursion depth: 1/20 Unstrip post‐expand size: 18965/5000000 bytes Lua time usage: 0.132/10.000 seconds Lua memory usage: 2997201/52428800 bytes Number of Wikibase entities loaded: 0/400 --> <!-- Transclusion expansion time report (%,ms,calls,template) 100.00% 228.698 1 -total 55.05% 125.893 1 Template:Reflist 41.35% 94.568 1 Template:URI_scheme 41.05% 93.886 1 Template:Cite_news 37.39% 85.506 1 Template:Navbox 4.63% 10.595 2 Template:Cite_web 1.78% 4.072 1 Template:Lowercase 0.79% 1.815 1 Template:Main_other --> <!-- Saved in parser cache with key enwiki:pcache:idhash:19336673-0!canonical and timestamp 20241117090250 and revision id 1154881230. 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