Schemes should be registered with IANA

url.bs

@@ -848,8 +848,10 @@ followed by "<code>?</code>" and a <a lt="URL query">query</a>.
 
 <p>A <a lt="URL scheme">scheme</a> must be one <a>ASCII alpha</a>, followed by zero or
 more of <a>ASCII alphanumeric</a>, "<code>+</code>", "<code>-</code>", and
-"<code>.</code>". A <a lt="URL scheme">scheme</a> must be registered
-<span class=XXX>...</span>.
+"<code>.</code>". Developers should ensure that all <a lt="URL scheme">schemes</a> that
+they use are registered in the IANA URI [sic] Schemes registry.
+[[!IANA-URI-SCHEMES]]
+[[RFC7595]]
 
 <p>A <dfn id=concept-relative-url lt="relative URL">relative URL</dfn> must be either a
 <a>scheme-relative URL</a>, or a <a lt="URL path">path</a> that does not start with a

url.html

@@ -30,7 +30,7 @@
    <h1 class="p-name no-ref allcaps" id="title">URL</h1>
 
    <h2 class="no-num no-toc no-ref heading settled" id="subtitle"><span class="content">Living Standard — Last Updated
-    <time class="dt-updated" datetime="2015-07-14">14 July 2015</time></span></h2>
+    <time class="dt-updated" datetime="2015-07-15">15 July 2015</time></span></h2>
 
    <div data-fill-with="spec-metadata">
     <dl>
@@ -1364,8 +1364,10 @@ <h3 class="heading settled" data-level="4.1" id="url-writing"><span class="secno
 </p>
    <p>A <a data-link-type="dfn" href="#concept-url-scheme">scheme</a> must be one <a data-link-type="dfn" href="#ascii-alpha">ASCII alpha</a>, followed by zero or
 more of <a data-link-type="dfn" href="#ascii-alphanumeric">ASCII alphanumeric</a>, "<code>+</code>", "<code>-</code>", and
-"<code>.</code>". A <a data-link-type="dfn" href="#concept-url-scheme">scheme</a> must be registered
-<span class="XXX">...</span>.
+"<code>.</code>". Developers should ensure that all <a data-link-type="dfn" href="#concept-url-scheme">schemes</a> that
+they use are registered in the IANA URI [sic] Schemes registry.
+<a data-link-type="biblio" href="#biblio-iana-uri-schemes">[IANA-URI-SCHEMES]</a>
+<a data-link-type="biblio" href="#biblio-rfc7595">[RFC7595]</a>
 
 </p>
    <p>A <dfn data-dfn-type="dfn" data-noexport="" id="concept-relative-url">relative URL<a class="self-link" href="#concept-relative-url"></a></dfn> must be either a
@@ -4636,6 +4638,8 @@ <h3 class="no-num heading settled" id="normative"><span class="content">Normativ
    <dd>Arun Ranganathan; Jonas Sicking. <a href="http://dev.w3.org/2006/webapi/FileAPI/">File API</a>. URL: <a href="http://dev.w3.org/2006/webapi/FileAPI/">http://dev.w3.org/2006/webapi/FileAPI/</a>
    <dt id="biblio-html"><a class="self-link" href="#biblio-html"></a>[HTML]
    <dd>Ian Hickson. <a href="https://html.spec.whatwg.org/multipage/">HTML Standard</a>. Living Standard. URL: <a href="https://html.spec.whatwg.org/multipage/">https://html.spec.whatwg.org/multipage/</a>
+   <dt id="biblio-iana-uri-schemes"><a class="self-link" href="#biblio-iana-uri-schemes"></a>[IANA-URI-SCHEMES]
+   <dd><a href="http://www.iana.org/assignments/uri-schemes/uri-schemes.xhtml">Uniform Resource Identifier (URI) Schemes</a>. URL: <a href="http://www.iana.org/assignments/uri-schemes/uri-schemes.xhtml">http://www.iana.org/assignments/uri-schemes/uri-schemes.xhtml</a>
    <dt id="biblio-idna"><a class="self-link" href="#biblio-idna"></a>[IDNA]
    <dd>Mark Davis; Michel Suignard. <a href="http://www.unicode.org/reports/tr46/">Unicode IDNA Compatibility Processing</a>. URL: <a href="http://www.unicode.org/reports/tr46/">http://www.unicode.org/reports/tr46/</a>
    <dt id="biblio-webidl"><a class="self-link" href="#biblio-webidl"></a>[WEBIDL]
@@ -4660,6 +4664,8 @@ <h3 class="no-num heading settled" id="informative"><span class="content">Inform
    <dd>S. Kawamura; M. Kawashima. <a href="https://tools.ietf.org/html/rfc5952">A Recommendation for IPv6 Address Text Representation</a>. August 2010. Proposed Standard. URL: <a href="https://tools.ietf.org/html/rfc5952">https://tools.ietf.org/html/rfc5952</a>
    <dt id="biblio-rfc6454"><a class="self-link" href="#biblio-rfc6454"></a>[RFC6454]
    <dd>A. Barth. <a href="https://tools.ietf.org/html/rfc6454">The Web Origin Concept</a>. December 2011. Proposed Standard. URL: <a href="https://tools.ietf.org/html/rfc6454">https://tools.ietf.org/html/rfc6454</a>
+   <dt id="biblio-rfc7595"><a class="self-link" href="#biblio-rfc7595"></a>[RFC7595]
+   <dd>D. Thaler, Ed.; T. Hansen; T. Hardie. <a href="https://tools.ietf.org/html/rfc7595">Guidelines and Registration Procedures for URI Schemes</a>. June 2015. Best Current Practice. URL: <a href="https://tools.ietf.org/html/rfc7595">https://tools.ietf.org/html/rfc7595</a>
    <dt id="biblio-rfc791"><a class="self-link" href="#biblio-rfc791"></a>[RFC791]
    <dd>J. Postel. <a href="https://tools.ietf.org/html/rfc791">Internet Protocol</a>. September 1981. Internet Standard. URL: <a href="https://tools.ietf.org/html/rfc791">https://tools.ietf.org/html/rfc791</a></dl>
   <h2 class="no-num heading settled" id="idl-index"><span class="content">IDL Index</span><a class="self-link" href="#idl-index"></a></h2>