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674 lines
34 KiB
674 lines
34 KiB
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html lang="en-US-x-Hixie" ><head><title>12 IANA considerations — HTML5 </title><style type="text/css">
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pre { margin-left: 2em; white-space: pre-wrap; }
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h2 { margin: 3em 0 1em 0; }
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h3 { margin: 2.5em 0 1em 0; }
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h4 { margin: 2.5em 0 0.75em 0; }
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h5, h6 { margin: 2.5em 0 1em; }
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h1 + h2, h1 + h2 + h2 { margin: 0.75em 0 0.75em; }
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h2 + h3, h3 + h4, h4 + h5, h5 + h6 { margin-top: 0.5em; }
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p { margin: 1em 0; }
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hr:not(.top) { display: block; background: none; border: none; padding: 0; margin: 2em 0; height: auto; }
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dl, dd { margin-top: 0; margin-bottom: 0; }
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dt { margin-top: 0.75em; margin-bottom: 0.25em; clear: left; }
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dt + dt { margin-top: 0; }
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dd dt { margin-top: 0.25em; margin-bottom: 0; }
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dd p { margin-top: 0; }
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dd dl + p { margin-top: 1em; }
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dd table + p { margin-top: 1em; }
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p + * > li, dd li { margin: 1em 0; }
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dt, dfn { font-weight: bold; font-style: normal; }
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dt dfn { font-style: italic; }
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pre, code { font-size: inherit; font-family: monospace; font-variant: normal; }
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pre strong { color: black; font: inherit; font-weight: bold; background: yellow; }
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pre em { font-weight: bolder; font-style: normal; }
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@media screen { code { color: orangered; } code :link, code :visited { color: inherit; } }
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var sub { vertical-align: bottom; font-size: smaller; position: relative; top: 0.1em; }
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table { border-collapse: collapse; border-style: hidden hidden none hidden; }
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table thead, table tbody { border-bottom: solid; }
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table tbody th:first-child { border-left: solid; }
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table tbody th { text-align: left; }
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table td, table th { border-left: solid; border-right: solid; border-bottom: solid thin; vertical-align: top; padding: 0.2em; }
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blockquote { margin: 0 0 0 2em; border: 0; padding: 0; font-style: italic; }
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.bad, .bad *:not(.XXX) { color: gray; border-color: gray; background: transparent; }
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.matrix, .matrix td { border: none; text-align: right; }
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.matrix { margin-left: 2em; }
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.dice-example { border-collapse: collapse; border-style: hidden solid solid hidden; border-width: thin; margin-left: 3em; }
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.dice-example caption { width: 30em; font-size: smaller; font-style: italic; padding: 0.75em 0; text-align: left; }
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.dice-example td, .dice-example th { border: solid thin; width: 1.35em; height: 1.05em; text-align: center; padding: 0; }
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.toc dfn, h1 dfn, h2 dfn, h3 dfn, h4 dfn, h5 dfn, h6 dfn { font: inherit; }
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img.extra { float: right; }
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pre.idl { border: solid thin; background: #EEEEEE; color: black; padding: 0.5em 1em; }
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pre.idl :link, pre.idl :visited { color: inherit; background: transparent; }
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pre.css { border: solid thin; background: #FFFFEE; color: black; padding: 0.5em 1em; }
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pre.css:first-line { color: #AAAA50; }
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dl.domintro { color: green; margin: 2em 0 2em 2em; padding: 0.5em 1em; border: none; background: #DDFFDD; }
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hr + dl.domintro, div.impl + dl.domintro { margin-top: 2.5em; margin-bottom: 1.5em; }
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dl.domintro dt, dl.domintro dt * { color: black; text-decoration: none; }
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dl.domintro dd { margin: 0.5em 0 1em 2em; padding: 0; }
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dl.domintro dd p { margin: 0.5em 0; }
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dl.switch { padding-left: 2em; }
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dl.switch > dt { text-indent: -1.5em; }
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dl.switch > dt:before { content: '\21AA'; padding: 0 0.5em 0 0; display: inline-block; width: 1em; text-align: right; line-height: 0.5em; }
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dl.triple { padding: 0 0 0 1em; }
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dl.triple dt, dl.triple dd { margin: 0; display: inline }
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dl.triple dt:after { content: ':'; }
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dl.triple dd:after { content: '\A'; white-space: pre; }
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.diff-old { text-decoration: line-through; color: silver; background: transparent; }
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.diff-chg, .diff-new { text-decoration: underline; color: green; background: transparent; }
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a .diff-new { border-bottom: 1px blue solid; }
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h2 { page-break-before: always; }
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h1, h2, h3, h4, h5, h6 { page-break-after: avoid; }
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h1 + h2, hr + h2.no-toc { page-break-before: auto; }
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p > span:not([title=""]):not([class="XXX"]):not([class="impl"]):not([class="note"]),
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li > span:not([title=""]):not([class="XXX"]):not([class="impl"]):not([class="note"]), { border-bottom: solid #9999CC; }
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div.head { margin: 0 0 1em; padding: 1em 0 0 0; }
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div.head p { margin: 0; }
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div.head h1 { margin: 0; }
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div.head .logo { float: right; margin: 0 1em; }
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div.head .logo img { border: none } /* remove border from top image */
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div.head dl { margin: 1em 0; }
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div.head p.copyright, div.head p.alt { font-size: x-small; font-style: oblique; margin: 0; }
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body > .toc > li { margin-top: 1em; margin-bottom: 1em; }
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body > .toc.brief > li { margin-top: 0.35em; margin-bottom: 0.35em; }
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body > .toc > li > * { margin-bottom: 0.5em; }
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body > .toc > li > * > li > * { margin-bottom: 0.25em; }
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.toc, .toc li { list-style: none; }
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.brief { margin-top: 1em; margin-bottom: 1em; line-height: 1.1; }
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.brief li { margin: 0; padding: 0; }
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.brief li p { margin: 0; padding: 0; }
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.category-list { margin-top: -0.75em; margin-bottom: 1em; line-height: 1.5; }
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.category-list::before { content: '\21D2\A0'; font-size: 1.2em; font-weight: 900; }
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.category-list li { display: inline; }
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.category-list li:not(:last-child)::after { content: ', '; }
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.category-list li > span, .category-list li > a { text-transform: lowercase; }
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.category-list li * { text-transform: none; } /* don't affect <code> nested in <a> */
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.XXX { color: #E50000; background: white; border: solid red; padding: 0.5em; margin: 1em 0; }
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.XXX > :first-child { margin-top: 0; }
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p .XXX { line-height: 3em; }
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.annotation { border: solid thin black; background: #0C479D; color: white; position: relative; margin: 8px 0 20px 0; }
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.annotation:before { position: absolute; left: 0; top: 0; width: 100%; height: 100%; margin: 6px -6px -6px 6px; background: #333333; z-index: -1; content: ''; }
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.annotation :link, .annotation :visited { color: inherit; }
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.annotation :link:hover, .annotation :visited:hover { background: transparent; }
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.annotation span { border: none ! important; }
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.note { color: green; background: transparent; font-family: sans-serif; }
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.warning { color: red; background: transparent; }
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.note, .warning { font-weight: bolder; font-style: italic; }
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p.note, div.note { padding: 0.5em 2em; }
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span.note { padding: 0 2em; }
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.note p:first-child, .warning p:first-child { margin-top: 0; }
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.note p:last-child, .warning p:last-child { margin-bottom: 0; }
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.warning:before { font-style: normal; }
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p.note:before { content: 'Note: '; }
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p.warning:before { content: '\26A0 Warning! '; }
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.bookkeeping:before { display: block; content: 'Bookkeeping details'; font-weight: bolder; font-style: italic; }
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.bookkeeping { font-size: 0.8em; margin: 2em 0; }
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.bookkeeping p { margin: 0.5em 2em; display: list-item; list-style: square; }
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.bookkeeping dt { margin: 0.5em 2em 0; }
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.bookkeeping dd { margin: 0 3em 0.5em; }
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h4 { position: relative; z-index: 3; }
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h4 + .element, h4 + div + .element { margin-top: -2.5em; padding-top: 2em; }
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.element {
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background: #EEEEFF;
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color: black;
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margin: 0 0 1em 0.15em;
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padding: 0 1em 0.25em 0.75em;
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border-left: solid #9999FF 0.25em;
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position: relative;
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z-index: 1;
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}
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.element:before {
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position: absolute;
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z-index: 2;
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top: 0;
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left: -1.15em;
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height: 2em;
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width: 0.9em;
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background: #EEEEFF;
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content: ' ';
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border-style: none none solid solid;
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border-color: #9999FF;
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border-width: 0.25em;
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}
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.example { display: block; color: #222222; background: #FCFCFC; border-left: double; margin-left: 2em; padding-left: 1em; }
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td > .example:only-child { margin: 0 0 0 0.1em; }
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ul.domTree, ul.domTree ul { padding: 0 0 0 1em; margin: 0; }
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ul.domTree li { padding: 0; margin: 0; list-style: none; position: relative; }
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ul.domTree li li { list-style: none; }
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ul.domTree li:first-child::before { position: absolute; top: 0; height: 0.6em; left: -0.75em; width: 0.5em; border-style: none none solid solid; content: ''; border-width: 0.1em; }
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ul.domTree li:not(:last-child)::after { position: absolute; top: 0; bottom: -0.6em; left: -0.75em; width: 0.5em; border-style: none none solid solid; content: ''; border-width: 0.1em; }
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ul.domTree span { font-style: italic; font-family: serif; }
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ul.domTree .t1 code { color: purple; font-weight: bold; }
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ul.domTree .t2 { font-style: normal; font-family: monospace; }
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ul.domTree .t2 .name { color: black; font-weight: bold; }
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ul.domTree .t2 .value { color: blue; font-weight: normal; }
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ul.domTree .t3 code, .domTree .t4 code, .domTree .t5 code { color: gray; }
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ul.domTree .t7 code, .domTree .t8 code { color: green; }
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ul.domTree .t10 code { color: teal; }
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body.dfnEnabled dfn { cursor: pointer; }
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.dfnPanel {
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display: inline;
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position: absolute;
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z-index: 10;
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height: auto;
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width: auto;
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padding: 0.5em 0.75em;
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font: small sans-serif, Droid Sans Fallback;
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background: #DDDDDD;
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color: black;
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border: outset 0.2em;
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}
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.dfnPanel * { margin: 0; padding: 0; font: inherit; text-indent: 0; }
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.dfnPanel :link, .dfnPanel :visited { color: black; }
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.dfnPanel p { font-weight: bolder; }
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.dfnPanel * + p { margin-top: 0.25em; }
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.dfnPanel li { list-style-position: inside; }
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#configUI { position: absolute; z-index: 20; top: 10em; right: 1em; width: 11em; font-size: small; }
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#configUI p { margin: 0.5em 0; padding: 0.3em; background: #EEEEEE; color: black; border: inset thin; }
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#configUI p label { display: block; }
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#configUI #updateUI, #configUI .loginUI { text-align: center; }
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#configUI input[type=button] { display: block; margin: auto; }
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fieldset { margin: 1em; padding: 0.5em 1em; }
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fieldset > legend + * { margin-top: 0; }
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fieldset > :last-child { margin-bottom: 0; }
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fieldset p { margin: 0.5em 0; }
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.stability {
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position: fixed;
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bottom: 0;
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left: 0; right: 0;
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margin: 0 auto 0 auto !important;
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z-index: 1000;
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width: 50%;
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background: maroon; color: yellow;
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-webkit-border-radius: 1em 1em 0 0;
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-moz-border-radius: 1em 1em 0 0;
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border-radius: 1em 1em 0 0;
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-moz-box-shadow: 0 0 1em #500;
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-webkit-box-shadow: 0 0 1em #500;
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box-shadow: 0 0 1em red;
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padding: 0.5em 1em;
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text-align: center;
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}
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.stability strong {
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display: block;
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}
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.stability input {
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appearance: none; margin: 0; border: 0; padding: 0.25em 0.5em; background: transparent; color: black;
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position: absolute; top: -0.5em; right: 0; font: 1.25em sans-serif; text-align: center;
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}
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.stability input:hover {
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color: white;
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text-shadow: 0 0 2px black;
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}
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.stability input:active {
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padding: 0.3em 0.45em 0.2em 0.55em;
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}
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.stability :link, .stability :visited,
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.stability :link:hover, .stability :visited:hover {
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background: transparent;
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color: white;
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}
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</style><link href="data:text/css,.impl%20%7B%20display:%20none;%20%7D%0Ahtml%20%7B%20border:%20solid%20yellow;%20%7D%20.domintro:before%20%7B%20display:%20none;%20%7D" id="author" rel="alternate stylesheet" title="Author documentation only"><link href="data:text/css,.impl%20%7B%20background:%20%23FFEEEE;%20%7D%20.domintro:before%20%7B%20background:%20%23FFEEEE;%20%7D" id="highlight" rel="alternate stylesheet" title="Highlight implementation
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requirements"><link href="http://www.w3.org/StyleSheets/TR/W3C-WD" rel="stylesheet" type="text/css"><style type="text/css">
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.applies thead th > * { display: block; }
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.applies thead code { display: block; }
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.applies tbody th { whitespace: nowrap; }
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.applies td { text-align: center; }
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.applies .yes { background: yellow; }
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.matrix, .matrix td { border: hidden; text-align: right; }
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.matrix { margin-left: 2em; }
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.dice-example { border-collapse: collapse; border-style: hidden solid solid hidden; border-width: thin; margin-left: 3em; }
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.dice-example caption { width: 30em; font-size: smaller; font-style: italic; padding: 0.75em 0; text-align: left; }
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.dice-example td, .dice-example th { border: solid thin; width: 1.35em; height: 1.05em; text-align: center; padding: 0; }
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td.eg { border-width: thin; text-align: center; }
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#table-example-1 { border: solid thin; border-collapse: collapse; margin-left: 3em; }
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#table-example-1 * { font-family: "Essays1743", serif; line-height: 1.01em; }
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#table-example-1 caption { padding-bottom: 0.5em; }
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#table-example-1 thead, #table-example-1 tbody { border: none; }
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#table-example-1 th, #table-example-1 td { border: solid thin; }
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#table-example-1 th { font-weight: normal; }
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#table-example-1 td { border-style: none solid; vertical-align: top; }
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#table-example-1 th { padding: 0.5em; vertical-align: middle; text-align: center; }
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#table-example-1 tbody tr:first-child td { padding-top: 0.5em; }
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#table-example-1 tbody tr:last-child td { padding-bottom: 1.5em; }
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#table-example-1 tbody td:first-child { padding-left: 2.5em; padding-right: 0; width: 9em; }
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#table-example-1 tbody td:first-child::after { content: leader(". "); }
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#table-example-1 tbody td { padding-left: 2em; padding-right: 2em; }
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#table-example-1 tbody td:first-child + td { width: 10em; }
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#table-example-1 tbody td:first-child + td ~ td { width: 2.5em; }
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#table-example-1 tbody td:first-child + td + td + td ~ td { width: 1.25em; }
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.apple-table-examples { border: none; border-collapse: separate; border-spacing: 1.5em 0em; width: 40em; margin-left: 3em; }
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.apple-table-examples * { font-family: "Times", serif; }
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.apple-table-examples td, .apple-table-examples th { border: none; white-space: nowrap; padding-top: 0; padding-bottom: 0; }
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.apple-table-examples tbody th:first-child { border-left: none; width: 100%; }
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.apple-table-examples thead th:first-child ~ th { font-size: smaller; font-weight: bolder; border-bottom: solid 2px; text-align: center; }
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.apple-table-examples tbody th::after, .apple-table-examples tfoot th::after { content: leader(". ") }
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.apple-table-examples tbody th, .apple-table-examples tfoot th { font: inherit; text-align: left; }
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.apple-table-examples td { text-align: right; vertical-align: top; }
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.apple-table-examples.e1 tbody tr:last-child td { border-bottom: solid 1px; }
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.apple-table-examples.e1 tbody + tbody tr:last-child td { border-bottom: double 3px; }
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.apple-table-examples.e2 th[scope=row] { padding-left: 1em; }
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.apple-table-examples sup { line-height: 0; }
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.details-example img { vertical-align: top; }
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#base64-table {
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white-space: nowrap;
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font-size: 0.6em;
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column-width: 6em;
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column-count: 5;
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column-gap: 1em;
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-moz-column-width: 6em;
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-moz-column-count: 5;
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-moz-column-gap: 1em;
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-webkit-column-width: 6em;
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-webkit-column-count: 5;
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-webkit-column-gap: 1em;
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}
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#base64-table thead { display: none; }
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#base64-table * { border: none; }
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#base64-table tbody td:first-child:after { content: ':'; }
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#base64-table tbody td:last-child { text-align: right; }
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#named-character-references-table {
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white-space: nowrap;
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font-size: 0.6em;
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column-width: 30em;
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column-gap: 1em;
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-moz-column-width: 30em;
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-moz-column-gap: 1em;
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-webkit-column-width: 30em;
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-webkit-column-gap: 1em;
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}
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#named-character-references-table > table > tbody > tr > td:first-child + td,
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#named-character-references-table > table > tbody > tr > td:last-child { text-align: center; }
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#named-character-references-table > table > tbody > tr > td:last-child:hover > span { position: absolute; top: auto; left: auto; margin-left: 0.5em; line-height: 1.2; font-size: 5em; border: outset; padding: 0.25em 0.5em; background: white; width: 1.25em; height: auto; text-align: center; }
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#named-character-references-table > table > tbody > tr#entity-CounterClockwiseContourIntegral > td:first-child { font-size: 0.5em; }
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.glyph.control { color: red; }
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@font-face {
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font-family: 'Essays1743';
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src: url('http://www.whatwg.org/specs/web-apps/current-work/fonts/Essays1743.ttf');
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}
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@font-face {
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font-family: 'Essays1743';
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font-weight: bold;
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src: url('http://www.whatwg.org/specs/web-apps/current-work/fonts/Essays1743-Bold.ttf');
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}
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@font-face {
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font-family: 'Essays1743';
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font-style: italic;
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src: url('http://www.whatwg.org/specs/web-apps/current-work/fonts/Essays1743-Italic.ttf');
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}
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@font-face {
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font-family: 'Essays1743';
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font-style: italic;
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font-weight: bold;
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|
src: url('http://www.whatwg.org/specs/web-apps/current-work/fonts/Essays1743-BoldItalic.ttf');
|
|
}
|
|
|
|
</style><style type="text/css">
|
|
.domintro:before { display: table; margin: -1em -0.5em -0.5em auto; width: auto; content: 'This box is non-normative. Implementation requirements are given below this box.'; color: black; font-style: italic; border: solid 2px; background: white; padding: 0 0.25em; }
|
|
</style><script type="text/javascript">
|
|
function getCookie(name) {
|
|
var params = location.search.substr(1).split("&");
|
|
for (var index = 0; index < params.length; index++) {
|
|
if (params[index] == name)
|
|
return "1";
|
|
var data = params[index].split("=");
|
|
if (data[0] == name)
|
|
return unescape(data[1]);
|
|
}
|
|
var cookies = document.cookie.split("; ");
|
|
for (var index = 0; index < cookies.length; index++) {
|
|
var data = cookies[index].split("=");
|
|
if (data[0] == name)
|
|
return unescape(data[1]);
|
|
}
|
|
return null;
|
|
}
|
|
</script>
|
|
<script src="link-fixup.js" type="text/javascript"></script>
|
|
<link href="style.css" rel="stylesheet"><link href="obsolete.html" title="11 Obsolete features" rel="prev">
|
|
<link href="spec.html#contents" title="Table of contents" rel="index">
|
|
<link href="index.html" title="Index" rel="next">
|
|
</head><body><div class="head" id="head">
|
|
<div id="multipage-common">
|
|
<p class="stability" id="wip"><strong>This is a work in
|
|
progress!</strong> For the latest updates from the HTML WG, possibly
|
|
including important bug fixes, please look at the <a href="http://dev.w3.org/html5/spec/Overview.html">editor's draft</a> instead.
|
|
There may also be a more
|
|
<a href="http://www.w3.org/TR/html5">up-to-date Working Draft</a>
|
|
with changes based on resolution of Last Call issues.
|
|
<input onclick="closeWarning(this.parentNode)" type="button" value="╳⃝"></p>
|
|
<script type="text/javascript">
|
|
function closeWarning(element) {
|
|
element.parentNode.removeChild(element);
|
|
var date = new Date();
|
|
date.setDate(date.getDate()+4);
|
|
document.cookie = 'hide-obsolescence-warning=1; expires=' + date.toGMTString();
|
|
}
|
|
if (getCookie('hide-obsolescence-warning') == '1')
|
|
setTimeout(function () { document.getElementById('wip').parentNode.removeChild(document.getElementById('wip')); }, 2000);
|
|
</script></div>
|
|
|
|
<p><a href="http://www.w3.org/"><img alt="W3C" height="48" src="http://www.w3.org/Icons/w3c_home" width="72"></a></p>
|
|
|
|
<h1>HTML5</h1>
|
|
</div><div>
|
|
<a href="obsolete.html" class="prev">11 Obsolete features</a> –
|
|
<a href="spec.html#contents">Table of contents</a> –
|
|
<a href="index.html" class="next">Index</a>
|
|
<ol class="toc"><li><a href="iana.html#iana"><span class="secno">12 </span>IANA considerations</a>
|
|
<ol><li><a href="iana.html#text-html"><span class="secno">12.1 </span><code>text/html</code></a></li><li><a href="iana.html#text-html-sandboxed"><span class="secno">12.2 </span><code>text/html-sandboxed</code></a></li><li><a href="iana.html#application-xhtml-xml"><span class="secno">12.3 </span><code>application/xhtml+xml</code></a></li><li><a href="iana.html#text-cache-manifest"><span class="secno">12.4 </span><code>text/cache-manifest</code></a></li></ol></li></ol></div>
|
|
|
|
<h2 id="iana"><span class="secno">12 </span>IANA considerations</h2><h3 id="text-html"><span class="secno">12.1 </span><dfn><code>text/html</code></dfn></h3><p>This registration is for community review and will be submitted
|
|
to the IESG for review, approval, and registration with IANA.</p><dl><dt>Type name:</dt>
|
|
<dd>text</dd>
|
|
<dt>Subtype name:</dt>
|
|
<dd>html</dd>
|
|
<dt>Required parameters:</dt>
|
|
<dd>No required parameters</dd>
|
|
<dt>Optional parameters:</dt>
|
|
<dd>
|
|
<dl><dt><code title="">charset</code></dt>
|
|
<dd>
|
|
<p>The <code title="">charset</code> parameter may be provided
|
|
to definitively specify the <a href="dom.html#document-s-character-encoding">document's character
|
|
encoding</a>, overriding any <a href="semantics.html#character-encoding-declaration" title="character encoding
|
|
declaration">character encoding declarations</a> in the
|
|
document. The parameter's value must be the name of the
|
|
character encoding used to serialize the file, must be a valid
|
|
character encoding name, and must be an <a href="infrastructure.html#ascii-case-insensitive">ASCII
|
|
case-insensitive</a> match for the <a href="infrastructure.html#preferred-mime-name">preferred MIME
|
|
name</a> for that encoding. <a href="references.html#refsIANACHARSET">[IANACHARSET]</a></p>
|
|
</dd>
|
|
</dl></dd>
|
|
<dt>Encoding considerations:</dt>
|
|
<dd>See the section on <a href="semantics.html#character-encoding-declaration" title="character encoding
|
|
declaration">character encoding declarations</a>.</dd>
|
|
<dt>Security considerations:</dt>
|
|
<dd>
|
|
|
|
<p>Entire novels have been written about the security
|
|
considerations that apply to HTML documents. Many are listed in
|
|
this document, to which the reader is referred for more
|
|
details. Some general concerns bear mentioning here, however:</p>
|
|
|
|
<p>HTML is scripted language, and has a large number of APIs (some
|
|
of which are described in this document). Script can expose the
|
|
user to potential risks of information leakage, credential
|
|
leakage, cross-site scripting attacks, cross-site request
|
|
forgeries, and a host of other problems. While the designs in this
|
|
specification are intended to be safe if implemented correctly, a
|
|
full implementation is a massive undertaking and, as with any
|
|
software, user agents are likely to have security bugs.</p>
|
|
|
|
<p>Even without scripting, there are specific features in HTML
|
|
which, for historical reasons, are required for broad
|
|
compatibility with legacy content but that expose the user to
|
|
unfortunate security problems. In particular, the <code><a href="embedded-content-1.html#the-img-element">img</a></code>
|
|
element can be used in conjunction with some other features as a
|
|
way to effect a port scan from the user's location on the
|
|
Internet. This can expose local network topologies that the
|
|
attacker would otherwise not be able to determine.</p>
|
|
|
|
<p>HTML relies on a compartmentalization scheme sometimes known as
|
|
the <i>same-origin policy</i>. An <a href="origin-0.html#origin">origin</a> in most
|
|
cases consists of all the pages served from the same host, on the
|
|
same port, using the same protocol.</p>
|
|
|
|
<p>It is critical, therefore, to ensure that any untrusted content
|
|
that forms part of a site be hosted on a different
|
|
<a href="origin-0.html#origin">origin</a> than any sensitive content on that site.
|
|
Untrusted content can easily spoof any other page on the same
|
|
origin, read data from that origin, cause scripts in that origin
|
|
to execute, submit forms to and from that origin even if they are
|
|
protected from cross-site request forgery attacks by unique
|
|
tokens, and make use of any third-party resources exposed to or
|
|
rights granted to that origin.</p>
|
|
|
|
</dd>
|
|
<dt>Interoperability considerations:</dt>
|
|
<dd>
|
|
Rules for processing both conforming and non-conforming content
|
|
are defined in this specification.
|
|
</dd>
|
|
<dt>Published specification:</dt>
|
|
<dd id="authors-using-html">
|
|
This document is the relevant specification. Labeling a resource
|
|
with the <code><a href="#text-html">text/html</a></code> type asserts that the resource is
|
|
an <a href="dom.html#html-documents" title="HTML documents">HTML document</a> using
|
|
<a href="syntax.html#syntax">the HTML syntax</a>.
|
|
</dd>
|
|
<dt>Applications that use this media type:</dt>
|
|
<dd>
|
|
Web browsers, tools for processing Web content, HTML authoring
|
|
tools, search engines, validators.
|
|
</dd>
|
|
<dt>Additional information:</dt>
|
|
<dd>
|
|
<dl><dt>Magic number(s):</dt>
|
|
<dd>No sequence of bytes can uniquely identify an HTML
|
|
document. More information on detecting HTML documents is
|
|
available in the Media Type Sniffing specification. <a href="references.html#refsMIMESNIFF">[MIMESNIFF]</a></dd>
|
|
<dt>File extension(s):</dt>
|
|
<dd>"<code title="">html</code>" and "<code title="">htm</code>"
|
|
are commonly, but certainly not exclusively, used as the
|
|
extension for HTML documents.</dd>
|
|
<dt>Macintosh file type code(s):</dt>
|
|
<dd><code title="">TEXT</code></dd>
|
|
</dl></dd>
|
|
<dt>Person & email address to contact for further information:</dt>
|
|
<dd>Ian Hickson <ian@hixie.ch></dd>
|
|
<dt>Intended usage:</dt>
|
|
<dd>Common</dd>
|
|
<dt>Restrictions on usage:</dt>
|
|
<dd>No restrictions apply.</dd>
|
|
<dt>Author:</dt>
|
|
<dd>Ian Hickson <ian@hixie.ch></dd>
|
|
<dt>Change controller:</dt>
|
|
<dd>W3C</dd>
|
|
</dl><p>Fragment identifiers used with <code><a href="#text-html">text/html</a></code> resources
|
|
refer to <a href="history.html#the-indicated-part-of-the-document">the indicated part of the document</a>.</p><h3 id="text-html-sandboxed"><span class="secno">12.2 </span><dfn><code>text/html-sandboxed</code></dfn></h3><p>This registration is for community review and will be submitted
|
|
to the IESG for review, approval, and registration with IANA.</p><dl><dt>Type name:</dt>
|
|
<dd>text</dd>
|
|
<dt>Subtype name:</dt>
|
|
<dd>html-sandboxed</dd>
|
|
<dt>Required parameters:</dt>
|
|
<dd>No required parameters</dd>
|
|
<dt>Optional parameters:</dt>
|
|
<dd>Same as for <code><a href="#text-html">text/html</a></code></dd>
|
|
<dt>Encoding considerations:</dt>
|
|
<dd>Same as for <code><a href="#text-html">text/html</a></code></dd>
|
|
<dt>Security considerations:</dt>
|
|
<dd>
|
|
<p>The purpose of the <code><a href="#text-html-sandboxed">text/html-sandboxed</a></code> MIME type
|
|
is to provide a way for content providers to indicate that they
|
|
want the file to be interpreted in a manner that does not give the
|
|
file's contents access to the rest of the site. This is achieved
|
|
by assigning the <code><a href="infrastructure.html#document">Document</a></code> objects generated from
|
|
resources labeled as <code><a href="#text-html-sandboxed">text/html-sandboxed</a></code> unique
|
|
origins.</p>
|
|
<p>To avoid having legacy user agents treating resources labeled
|
|
as <code><a href="#text-html-sandboxed">text/html-sandboxed</a></code> as regular
|
|
<code><a href="#text-html">text/html</a></code> files, authors should avoid using the <code title="">.html</code> or <code title="">.htm</code> extensions for
|
|
resources labeled as <code><a href="#text-html-sandboxed">text/html-sandboxed</a></code>.</p>
|
|
<p>Furthermore, since the <code><a href="#text-html-sandboxed">text/html-sandboxed</a></code> MIME
|
|
type impacts the origin security model, authors should be careful
|
|
to prevent tampering with the MIME type labeling mechanism itself
|
|
when documents are labeled as <code><a href="#text-html-sandboxed">text/html-sandboxed</a></code>. If
|
|
an attacker can cause a file to be served as
|
|
<code><a href="#text-html">text/html</a></code> instead of
|
|
<code><a href="#text-html-sandboxed">text/html-sandboxed</a></code>, then the sandboxing will not
|
|
take effect and a cross-site scripting attack will become
|
|
possible.</p>
|
|
<p>Beyond this, the type is identical to <code><a href="#text-html">text/html</a></code>,
|
|
and the same considerations apply.</p>
|
|
</dd>
|
|
<dt>Interoperability considerations:</dt>
|
|
<dd>Same as for <code><a href="#text-html">text/html</a></code></dd>
|
|
<dt>Published specification:</dt>
|
|
<dd>
|
|
This document is the relevant specification. Labeling a resource
|
|
with the <code><a href="#text-html-sandboxed">text/html-sandboxed</a></code> type asserts that the
|
|
resource is an <a href="dom.html#html-documents" title="HTML documents">HTML document</a>
|
|
using <a href="syntax.html#syntax">the HTML syntax</a>.
|
|
</dd>
|
|
<dt>Applications that use this media type:</dt>
|
|
<dd>Same as for <code><a href="#text-html">text/html</a></code></dd>
|
|
<dt>Additional information:</dt>
|
|
<dd>
|
|
<dl><dt>Magic number(s):</dt>
|
|
<dd>Documents labeled as <code><a href="#text-html-sandboxed">text/html-sandboxed</a></code> are
|
|
heuristically indistinguishable from those labeled as
|
|
<code><a href="#text-html">text/html</a></code>.</dd>
|
|
<dt>File extension(s):</dt>
|
|
<dd>"<code title="">sandboxed</code>"</dd>
|
|
<dt>Macintosh file type code(s):</dt>
|
|
<dd><code title="">TEXT</code></dd>
|
|
</dl></dd>
|
|
<dt>Person & email address to contact for further information:</dt>
|
|
<dd>Ian Hickson <ian@hixie.ch></dd>
|
|
<dt>Intended usage:</dt>
|
|
<dd>Common</dd>
|
|
<dt>Restrictions on usage:</dt>
|
|
<dd>No restrictions apply.</dd>
|
|
<dt>Author:</dt>
|
|
<dd>Ian Hickson <ian@hixie.ch></dd>
|
|
<dt>Change controller:</dt>
|
|
<dd>W3C</dd>
|
|
</dl><p>Fragment identifiers used with <code><a href="#text-html-sandboxed">text/html-sandboxed</a></code>
|
|
resources refer to <a href="history.html#the-indicated-part-of-the-document">the indicated part of the
|
|
document</a>.</p><h3 id="application-xhtml-xml"><span class="secno">12.3 </span><dfn><code>application/xhtml+xml</code></dfn></h3><p>This registration is for community review and will be submitted
|
|
to the IESG for review, approval, and registration with IANA.</p><dl><dt>Type name:</dt>
|
|
<dd>application</dd>
|
|
<dt>Subtype name:</dt>
|
|
<dd>xhtml+xml</dd>
|
|
<dt>Required parameters:</dt>
|
|
<dd>Same as for <code>application/xml</code> <a href="references.html#refsRFC3023">[RFC3023]</a></dd>
|
|
<dt>Optional parameters:</dt>
|
|
<dd>Same as for <code>application/xml</code> <a href="references.html#refsRFC3023">[RFC3023]</a></dd>
|
|
<dt>Encoding considerations:</dt>
|
|
<dd>Same as for <code>application/xml</code> <a href="references.html#refsRFC3023">[RFC3023]</a></dd>
|
|
<dt>Security considerations:</dt>
|
|
<dd>Same as for <code>application/xml</code> <a href="references.html#refsRFC3023">[RFC3023]</a></dd>
|
|
<dt>Interoperability considerations:</dt>
|
|
<dd>Same as for <code>application/xml</code> <a href="references.html#refsRFC3023">[RFC3023]</a></dd>
|
|
<dt id="authors-using-xhtml">Published specification:</dt>
|
|
<dd>
|
|
Labeling a resource with the <code><a href="#application-xhtml-xml">application/xhtml+xml</a></code>
|
|
type asserts that the resource is an XML document that likely has
|
|
a root element from the <a href="namespaces.html#html-namespace-0">HTML namespace</a>. As such, the
|
|
relevant specifications are the XML specification, the Namespaces
|
|
in XML specification, and this specification. <a href="references.html#refsXML">[XML]</a> <a href="references.html#refsXMLNS">[XMLNS]</a>
|
|
</dd>
|
|
<dt>Applications that use this media type:</dt>
|
|
<dd>Same as for <code>application/xml</code> <a href="references.html#refsRFC3023">[RFC3023]</a></dd>
|
|
<dt>Additional information:</dt>
|
|
<dd>
|
|
<dl><dt>Magic number(s):</dt>
|
|
<dd>Same as for <code>application/xml</code> <a href="references.html#refsRFC3023">[RFC3023]</a></dd>
|
|
<dt>File extension(s):</dt>
|
|
<dd>"<code title="">xhtml</code>" and "<code title="">xht</code>"
|
|
are sometimes used as extensions for XML resources that have a
|
|
root element from the <a href="namespaces.html#html-namespace-0">HTML namespace</a>.</dd>
|
|
<dt>Macintosh file type code(s):</dt>
|
|
<dd><code title="">TEXT</code></dd>
|
|
</dl></dd>
|
|
<dt>Person & email address to contact for further information:</dt>
|
|
<dd>Ian Hickson <ian@hixie.ch></dd>
|
|
<dt>Intended usage:</dt>
|
|
<dd>Common</dd>
|
|
<dt>Restrictions on usage:</dt>
|
|
<dd>No restrictions apply.</dd>
|
|
<dt>Author:</dt>
|
|
<dd>Ian Hickson <ian@hixie.ch></dd>
|
|
<dt>Change controller:</dt>
|
|
<dd>W3C</dd>
|
|
</dl><p>Fragment identifiers used with <code><a href="#application-xhtml-xml">application/xhtml+xml</a></code>
|
|
resources have the same semantics as with any <a href="infrastructure.html#xml-mime-type">XML MIME
|
|
type</a>. <a href="references.html#refsRFC3023">[RFC3023]</a></p><h3 id="text-cache-manifest"><span class="secno">12.4 </span><dfn><code>text/cache-manifest</code></dfn></h3><p>This registration is for community review and will be submitted
|
|
to the IESG for review, approval, and registration with IANA.</p><dl><dt>Type name:</dt>
|
|
<dd>text</dd>
|
|
<dt>Subtype name:</dt>
|
|
<dd>cache-manifest</dd>
|
|
<dt>Required parameters:</dt>
|
|
<dd>No parameters</dd>
|
|
<dt>Optional parameters:</dt>
|
|
<dd>No parameters</dd>
|
|
<dt>Encoding considerations:</dt>
|
|
<dd>Always UTF-8.</dd>
|
|
<dt>Security considerations:</dt>
|
|
<dd>
|
|
<p>Cache manifests themselves pose no immediate risk unless
|
|
sensitive information is included within the
|
|
manifest. Implementations, however, are required to follow
|
|
specific rules when populating a cache based on a cache manifest,
|
|
to ensure that certain origin-based restrictions are
|
|
honored. Failure to correctly implement these rules can result in
|
|
information leakage, cross-site scripting attacks, and the
|
|
like.</p>
|
|
</dd>
|
|
<dt>Interoperability considerations:</dt>
|
|
<dd>
|
|
Rules for processing both conforming and non-conforming content
|
|
are defined in this specification.
|
|
</dd>
|
|
<dt>Published specification:</dt>
|
|
<dd>
|
|
This document is the relevant specification.
|
|
</dd>
|
|
<dt>Applications that use this media type:</dt>
|
|
<dd>
|
|
Web browsers.
|
|
</dd>
|
|
<dt>Additional information:</dt>
|
|
<dd>
|
|
<dl><dt>Magic number(s):</dt>
|
|
<dd>Cache manifests begin with the string "<code title="">CACHE
|
|
MANIFEST</code>", followed by either a U+0020 SPACE character, a
|
|
U+0009 CHARACTER TABULATION (tab) character, a U+000A LINE FEED
|
|
(LF) character, or a U+000D CARRIAGE RETURN (CR) character.</dd>
|
|
<dt>File extension(s):</dt>
|
|
<dd>"<code title="">appcache</code>"</dd>
|
|
<dt>Macintosh file type code(s):</dt>
|
|
<dd>No specific Macintosh file type codes are recommended for this type.</dd>
|
|
</dl></dd>
|
|
<dt>Person & email address to contact for further information:</dt>
|
|
<dd>Ian Hickson <ian@hixie.ch></dd>
|
|
<dt>Intended usage:</dt>
|
|
<dd>Common</dd>
|
|
<dt>Restrictions on usage:</dt>
|
|
<dd>No restrictions apply.</dd>
|
|
<dt>Author:</dt>
|
|
<dd>Ian Hickson <ian@hixie.ch></dd>
|
|
<dt>Change controller:</dt>
|
|
<dd>W3C</dd>
|
|
</dl><p>Fragment identifiers have no meaning with
|
|
<code><a href="#text-cache-manifest">text/cache-manifest</a></code> resources.</p></body></html>
|