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<h1 id="firstHeading" class="firstHeading">info URI scheme</h1>
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<div id="contentSub"><span class="mw-redirectedfrom">&nbsp;&nbsp;(Redirected from <a href="https://en.wikipedia.org/w/index.php?title=Info:&amp;redirect=no" class="mw-redirect" title="Info:">Info:</a>)</span></div>
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<div id="mw-content-text" class="mw-body-content mw-content-ltr" lang="en" dir="ltr"><div class="mw-parser-output"><p>In computing, <b>info</b> is a <a href="https://en.wikipedia.org/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="https://en.wikipedia.org/wiki/Library_of_Congress" title="Library of Congress">Library of Congress</a> identifiers, <a href="https://en.wikipedia.org/wiki/Handle_System" title="Handle System">Handle System</a> handles, and <a href="https://en.wikipedia.org/wiki/Digital_object_identifier" title="Digital object identifier">Digital object identifiers</a>.
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<div id="toc" class="toc" role="navigation" aria-labelledby="mw-toc-heading"><input type="checkbox" role="button" id="toctogglecheckbox" class="toctogglecheckbox" style="display:none"><div class="toctitle" lang="en" dir="ltr"><h2 id="mw-toc-heading">Contents</h2><span class="toctogglespan"><label class="toctogglelabel" for="toctogglecheckbox"></label></span></div>
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<li class="toclevel-1 tocsection-1"><a href="https://en.wikipedia.org/wiki/Info_URI_scheme#Specification"><span class="tocnumber">1</span> <span class="toctext">Specification</span></a></li>
<li class="toclevel-1 tocsection-2"><a href="https://en.wikipedia.org/wiki/Info_URI_scheme#Example"><span class="tocnumber">2</span> <span class="toctext">Example</span></a></li>
<li class="toclevel-1 tocsection-3"><a href="https://en.wikipedia.org/wiki/Info_URI_scheme#Namespace_Registry"><span class="tocnumber">3</span> <span class="toctext">Namespace Registry</span></a></li>
<li class="toclevel-1 tocsection-4"><a href="https://en.wikipedia.org/wiki/Info_URI_scheme#References"><span class="tocnumber">4</span> <span class="toctext">References</span></a></li>
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<h2><span class="mw-headline" id="Specification">Specification</span><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="https://en.wikipedia.org/w/index.php?title=Info_URI_scheme&amp;action=edit&amp;section=1" title="Edit section: Specification">edit</a><span class="mw-editsection-bracket">]</span></span></h2>
<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="https://en.wikipedia.org/wiki/Info_URI_scheme#cite_note-rfc4452-1">[1]</a></sup>
</p>
<h2><span class="mw-headline" id="Example">Example</span><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="https://en.wikipedia.org/w/index.php?title=Info_URI_scheme&amp;action=edit&amp;section=2" title="Edit section: Example">edit</a><span class="mw-editsection-bracket">]</span></span></h2>
<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="https://en.wikipedia.org/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>
<h2><span class="mw-headline" id="Namespace_Registry">Namespace Registry</span><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="https://en.wikipedia.org/w/index.php?title=Info_URI_scheme&amp;action=edit&amp;section=3" title="Edit section: Namespace Registry">edit</a><span class="mw-editsection-bracket">]</span></span></h2>
<p>Between 2003 and 2010, info namespaces were registered by the <a href="https://en.wikipedia.org/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="https://en.wikipedia.org/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="https://en.wikipedia.org/wiki/Info_URI_scheme#cite_note-OAI_DC-2">[2]</a></sup>
</p><p>In 2010, the registry was closed, in view of the increasing importance of the <a href="https://en.wikipedia.org/wiki/W3C" class="mw-redirect" title="W3C">W3C</a> <a href="https://en.wikipedia.org/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="https://en.wikipedia.org/wiki/Info_URI_scheme#cite_note-3">[3]</a></sup>
</p>
<h2><span class="mw-headline" id="References">References</span><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="https://en.wikipedia.org/w/index.php?title=Info_URI_scheme&amp;action=edit&amp;section=4" title="Edit section: References">edit</a><span class="mw-editsection-bracket">]</span></span></h2>
<style data-mw-deduplicate="TemplateStyles:r1011085734">.mw-parser-output .reflist{font-size:90%;margin-bottom:0.5em;list-style-type:decimal}.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="https://en.wikipedia.org/wiki/Info_URI_scheme#cite_ref-rfc4452_1-0" aria-label="Jump up" title="Jump up">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r999302996">.mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .id-lock-free a,.mw-parser-output .citation .cs1-lock-free a{background:linear-gradient(transparent,transparent),url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited a,.mw-parser-output .id-lock-registration a,.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:linear-gradient(transparent,transparent),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 a,.mw-parser-output .citation .cs1-lock-subscription a{background:linear-gradient(transparent,transparent),url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:linear-gradient(transparent,transparent),url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}</style><cite class="citation web 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="https://en.wikipedia.org/wiki/Internet_Engineering_Task_Force" title="Internet Engineering Task Force">Internet Engineering Task Force</a> Network Working Group<span class="reference-accessdate">. Retrieved <span class="nowrap">2008-09-15</span></span>.</cite><span title="ctx_ver=Z39.88-2004&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=unknown&amp;rft.btitle=The+%22info%22+URI+Scheme+for+Information+Assets+with+Identifiers+in+Public+Namespaces&amp;rft.pub=Internet+Engineering+Task+Force+Network+Working+Group&amp;rft_id=https%3A%2F%2Ftools.ietf.org%2Fhtml%2Frfc4452&amp;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="https://en.wikipedia.org/wiki/Info_URI_scheme#cite_ref-OAI_DC_2-0" aria-label="Jump up" title="Jump up">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r999302996"><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&amp;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&amp;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&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&amp;rft.genre=unknown&amp;rft.jtitle=info-uri.info&amp;rft.atitle=%22info%22+URI+Scheme&amp;rft_id=http%3A%2F%2Finfo-uri.info%2Fregistry%2FOAIHandler%3Fverb%3DListRecords%26metadataPrefix%3Doai_dc&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AInfo+URI+scheme" class="Z3988"></span></span>
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<li id="cite_note-3"><span class="mw-cite-backlink"><b><a href="https://en.wikipedia.org/wiki/Info_URI_scheme#cite_ref-3" aria-label="Jump up" title="Jump up">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r999302996"><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&amp;rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&amp;rft.genre=unknown&amp;rft.btitle=Notice&amp;rft_id=http%3A%2F%2Finfo-uri.info&amp;rfr_id=info%3Asid%2Fen.wikipedia.org%3AInfo+URI+scheme" class="Z3988"></span></span>
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<div role="navigation" class="navbox" aria-labelledby="Uniform_Resource_Identifier_(URI)_schemes" style="padding:3px"><table class="nowraplinks mw-collapsible autocollapse navbox-inner mw-made-collapsible" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><span class="mw-collapsible-toggle mw-collapsible-toggle-default" role="button" tabindex="0" aria-expanded="true"><a class="mw-collapsible-text">hide</a></span><style data-mw-deduplicate="TemplateStyles:r992953826">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}.mw-parser-output .infobox .navbar{font-size:100%}.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}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="https://en.wikipedia.org/wiki/Template:URI_schemes" title="Template:URI schemes"><abbr title="View this template" style=";;background:none transparent;border:none;box-shadow:none;padding:0;">v</abbr></a></li><li class="nv-talk"><a href="https://en.wikipedia.org/wiki/Template_talk:URI_schemes" title="Template talk:URI schemes"><abbr title="Discuss this template" style=";;background:none transparent;border:none;box-shadow:none;padding:0;">t</abbr></a></li><li class="nv-edit"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=Template:URI_schemes&amp;action=edit"><abbr title="Edit this template" style=";;background:none transparent;border:none;box-shadow:none;padding:0;">e</abbr></a></li></ul></div><div id="Uniform_Resource_Identifier_(URI)_schemes" style="font-size:114%;margin:0 4em"><a href="https://en.wikipedia.org/wiki/Uniform_Resource_Identifier" title="Uniform Resource Identifier">Uniform Resource Identifier</a> (URI) schemes</div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Official</th><td class="navbox-list navbox-odd hlist" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em">
<ul><li><a href="https://en.wikipedia.org/wiki/About_URI_scheme" title="About URI scheme">about</a></li>
<li><a href="https://en.wikipedia.org/wiki/Acct_(protocol)" class="mw-redirect" title="Acct (protocol)">acct</a></li>
<li><a href="https://en.wikipedia.org/wiki/Content_reference_identifier" title="Content reference identifier">crid</a></li>
<li><a href="https://en.wikipedia.org/wiki/Data_URI_scheme" title="Data URI scheme">data</a></li>
<li><a href="https://en.wikipedia.org/wiki/File_URI_scheme" title="File URI scheme">file</a></li>
<li><a href="https://en.wikipedia.org/wiki/File_Transfer_Protocol" title="File Transfer Protocol">ftp</a></li>
<li><a href="https://en.wikipedia.org/wiki/Geo_URI_scheme" title="Geo URI scheme">geo</a></li>
<li><a href="https://en.wikipedia.org/wiki/Gopher_(protocol)" title="Gopher (protocol)">gopher</a></li>
<li><a href="https://en.wikipedia.org/wiki/Hypertext_Transfer_Protocol#Technical_overview" title="Hypertext Transfer Protocol">http</a></li>
<li><a href="https://en.wikipedia.org/wiki/HTTPS" title="HTTPS">https</a></li>
<li><a class="mw-selflink selflink">info</a></li>
<li><a href="https://en.wikipedia.org/wiki/Lightweight_Directory_Access_Protocol#URI_scheme" title="Lightweight Directory Access Protocol">ldap</a></li>
<li><a href="https://en.wikipedia.org/wiki/Mailto" title="Mailto">mailto</a></li>
<li><a href="https://en.wikipedia.org/wiki/Network_File_System" title="Network File System">nfs</a></li>
<li><a href="https://en.wikipedia.org/wiki/Network_News_Transfer_Protocol" title="Network News Transfer Protocol">nntp</a></li>
<li><a href="https://en.wikipedia.org/wiki/SIP_URI_scheme" title="SIP URI scheme">sip / sips</a></li>
<li><a href="https://en.wikipedia.org/wiki/Tag_URI" class="mw-redirect" title="Tag URI">tag</a></li>
<li><a href="https://en.wikipedia.org/wiki/Telnet" title="Telnet">telnet</a></li>
<li><a href="https://en.wikipedia.org/wiki/Uniform_Resource_Name" title="Uniform Resource Name">urn</a></li>
<li><a href="https://en.wikipedia.org/wiki/View-source_URI_scheme" title="View-source URI scheme">view-source</a></li>
<li><a href="https://en.wikipedia.org/wiki/WebSocket#Overview" title="WebSocket">ws / wss</a></li>
<li><a href="https://en.wikipedia.org/wiki/XMPP" title="XMPP">xmpp</a></li></ul>
</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Unofficial</th><td class="navbox-list navbox-even hlist" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em">
<ul><li><a href="https://en.wikipedia.org/wiki/Hyper_Text_Coffee_Pot_Control_Protocol#Commands_and_replies" title="Hyper Text Coffee Pot Control Protocol">coffee</a></li>
<li><a href="https://en.wikipedia.org/wiki/Ed2k_URI_scheme" title="Ed2k URI scheme">ed2k</a></li>
<li><a href="https://en.wikipedia.org/wiki/Gemini_(protocol)" title="Gemini (protocol)">gemini</a></li>
<li><a href="https://en.wikipedia.org/wiki/Feed_URI_scheme" title="Feed URI scheme">feed</a></li>
<li><a href="https://en.wikipedia.org/wiki/Finger_protocol" title="Finger protocol">finger</a></li>
<li><a href="https://en.wikipedia.org/wiki/Internet_Relay_Chat#URI_scheme" title="Internet Relay Chat">irc / irc6 / ircs</a></li>
<li><a href="https://en.wikipedia.org/wiki/Lightweight_Directory_Access_Protocol#URI_scheme" title="Lightweight Directory Access Protocol">ldaps</a></li>
<li><a href="https://en.wikipedia.org/wiki/Magnet_URI_scheme" title="Magnet URI scheme">magnet</a></li>
<li><a href="https://en.wikipedia.org/wiki/Rsync" title="Rsync">rsync</a></li>
<li><a href="https://en.wikipedia.org/wiki/Yahoo!_Messenger#URI_scheme" title="Yahoo! Messenger">ymsgr</a></li></ul>
</div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div><a href="https://en.wikipedia.org/wiki/List_of_network_protocols_(OSI_model)" title="List of network protocols (OSI model)">Protocol list</a></div></td></tr></tbody></table></div>
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