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sri-addressable-caching.html
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<!doctype html><html lang="en">
<head>
<meta content="text/html; charset=utf-8" http-equiv="Content-Type">
<title>Subresource Integrity Addressable Caching</title>
<meta content="width=device-width, initial-scale=1, shrink-to-fit=no" name="viewport">
<style data-fill-with="stylesheet">/******************************************************************************
* Style sheet for the W3C specifications *
*
* Special classes handled by this style sheet include:
*
* Indices
* - .toc for the Table of Contents (<ol class="toc">)
* + <span class="secno"> for the section numbers
* - #toc for the Table of Contents (<nav id="toc">)
* - ul.index for Indices (<a href="#ref">term</a><span>, in §N.M</span>)
* - table.index for Index Tables (e.g. for properties or elements)
*
* Structural Markup
* - table.data for general data tables
* -> use 'scope' attribute, <colgroup>, <thead>, and <tbody> for best results !
* -> use <table class='complex data'> for extra-complex tables
* -> use <td class='long'> for paragraph-length cell content
* -> use <td class='pre'> when manual line breaks/indentation would help readability
* - dl.switch for switch statements
* - ol.algorithm for algorithms (helps to visualize nesting)
* - .figure and .caption (HTML4) and figure and figcaption (HTML5)
* -> .sidefigure for right-floated figures
* - ins/del
*
* Code
* - pre and code
*
* Special Sections
* - .note for informative notes (div, p, span, aside, details)
* - .example for informative examples (div, p, pre, span)
* - .issue for issues (div, p, span)
* - .advisement for loud normative statements (div, p, strong)
* - .annoying-warning for spec obsoletion notices (div, aside, details)
*
* Definition Boxes
* - pre.def for WebIDL definitions
* - table.def for tables that define other entities (e.g. CSS properties)
* - dl.def for definition lists that define other entitles (e.g. HTML elements)
*
* Numbering
* - .secno for section numbers in .toc and headings (<span class='secno'>3.2</span>)
* - .marker for source-inserted example/figure/issue numbers (<span class='marker'>Issue 4</span>)
* - ::before styled for CSS-generated issue/example/figure numbers:
* -> Documents wishing to use this only need to add
* figcaption::before,
* .caption::before { content: "Figure " counter(figure); }
* .example::before { content: "Example " counter(example); }
* .issue::before { content: "Issue " counter(issue); }
*
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* - .copyright for the copyright
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* Miscellaneous
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* on its container, depending on the effect desired.
* Note that this styling basically doesn't help at all when printing,
* since A4 paper isn't much wider than the max-width here.
* It's better to design things to fit into a narrower measure if possible.
* - js-added ToC jump links (see fixup.js)
*
******************************************************************************/
/******************************************************************************/
/* Body */
/******************************************************************************/
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counter-reset: example figure issue;
/* Layout */
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/******************************************************************************/
/* Front Matter & Navigation */
/******************************************************************************/
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p.copyright,
p.copyright small { font-size: small }
/** Back to Top / ToC Toggle **************************************************/
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#toc-nav {
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/* Ideally this uses :focus-within on #toc-nav */
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/** ToC Sidebar ***************************************************************/
/* Floating sidebar */
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left: 0;
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max-width: 80%;
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padding: 0;
position: absolute;
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}
}
/* Hide main scroller when only the ToC is visible anyway */
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body.toc-sidebar {
overflow: hidden;
}
}
/* Sidebar with its own space */
@media screen and (min-width: 78em) {
body:not(.toc-inline) #toc {
position: fixed;
top: 0; bottom: 0;
left: 0;
width: 23.5em;
overflow: auto;
padding: 0 1em;
padding-left: 42px;
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background: inherit;
background-color: #f7f8f9;
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body:not(.toc-inline) #toc h2 {
margin-top: .8rem;
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font-variant: all-small-caps;
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color: gray;
color: hsla(203,20%,40%,.7);
}
body:not(.toc-inline) {
padding-left: 29em;
}
/* See also Overflow section at the bottom */
body:not(.toc-inline) #toc-jump:not(:focus) {
width: 0;
height: 0;
padding: 0;
position: absolute;
overflow: hidden;
}
}
@media screen and (min-width: 90em) {
body:not(.toc-inline) {
margin: 0 4em;
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/******************************************************************************/
/* Sectioning */
/******************************************************************************/
/** Headings ******************************************************************/
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/** Subheadings ***************************************************************/
h1 + h2,
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/* #subtitle is a subtitle in an H2 under the H1 */
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}
h2 + h3,
h3 + h4,
h4 + h5,
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margin: 1em auto;
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:not(.head) > hr::before {
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/******************************************************************************/
/* Paragraphs and Lists */
/******************************************************************************/
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dl dd {
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dl.switch > dd > ol.algorithm,
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/******************************************************************************/
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vertical-align: super;
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/******************************************************************************/
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/******************************************************************************/
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/* Do something nice. */
/******************************************************************************/
/* Links */
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color: #034575;
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/* Backout above styling for W3C logo */
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/******************************************************************************/
/* Images */
/******************************************************************************/
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.caption::before, figcaption::before { content: "Figure " counter(figure) ". "; }
*/
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padding: .5em;
border: .5em;
border-left-style: solid;
page-break-inside: avoid;
}
span.issue, span.note {
padding: .1em .5em .15em;
border-right-style: solid;
}
.issue,
.note,
.example,
.advisement,
blockquote {
margin: 1em auto;
}
.note > p:first-child,
.issue > p:first-child,
blockquote > :first-child {
margin-top: 0;
}
blockquote > :last-child {
margin-bottom: 0;
}
/** Blockquotes ***************************************************************/
blockquote {
border-color: silver;
}
/** Open issue ****************************************************************/
.issue {
border-color: #E05252;
background: #FBE9E9;
counter-increment: issue;
overflow: auto;
}
.issue::before, .issue > .marker {
text-transform: uppercase;
color: #AE1E1E;
padding-right: 1em;
text-transform: uppercase;
}
/* Add .issue::before { content: "Issue " counter(issue); } for autogen numbers,
or use class="marker" to mark up the issue number in source. */
/** Example *******************************************************************/
.example {
border-color: #E0CB52;
background: #FCFAEE;
counter-increment: example;
overflow: auto;
clear: both;
}
.example::before, .example > .marker {
text-transform: uppercase;
color: #827017;
min-width: 7.5em;
display: block;
}
/* Add .example::before { content: "Example " counter(example); } for autogen numbers,
or use class="marker" to mark up the example number in source. */
/** Non-normative Note ********************************************************/
.note {
border-color: #52E052;
background: #E9FBE9;
overflow: auto;
}
.note::before, .note > .marker,
details.note > summary::before,
details.note > summary > .marker {
text-transform: uppercase;
display: block;
color: hsl(120, 70%, 30%);
}
/* Add .note::before { content: "Note"; } for autogen label,
or use class="marker" to mark up the label in source. */
details.note > summary {
display: block;
color: hsl(120, 70%, 30%);
}
details.note[open] > summary {
border-bottom: 1px silver solid;
}
/** Advisement Box ************************************************************/
/* for attention-grabbing normative statements */
.advisement {
border-color: orange;
border-style: none solid;
background: #FFEECC;
}
strong.advisement {
display: block;
text-align: center;
}
.advisement > .marker {
color: #B35F00;
}
/** Spec Obsoletion Notice ****************************************************/
/* obnoxious obsoletion notice for older/abandoned specs. */
details {
display: block;
}
summary {
font-weight: bolder;
}
.annoying-warning:not(details),
details.annoying-warning:not([open]) > summary,
details.annoying-warning[open] {
background: #fdd;
color: red;
font-weight: bold;
padding: .75em 1em;
border: thick red;
border-style: solid;
border-radius: 1em;
}
.annoying-warning :last-child {
margin-bottom: 0;
}
@media not print {
details.annoying-warning[open] {
position: fixed;
left: 1em;
right: 1em;
bottom: 1em;
z-index: 1000;
}
}
details.annoying-warning:not([open]) > summary {
text-align: center;
}
/** Entity Definition Boxes ***************************************************/
.def {
padding: .5em 1em;
background: #DEF;
margin: 1.2em 0;
border-left: 0.5em solid #8CCBF2;
}
/******************************************************************************/
/* Tables */
/******************************************************************************/
th, td {
text-align: left;
text-align: start;
}
/** Property/Descriptor Definition Tables *************************************/
table.def {
/* inherits .def box styling, see above */
width: 100%;
border-spacing: 0;
}
table.def td,
table.def th {
padding: 0.5em;
vertical-align: baseline;
border-bottom: 1px solid #bbd7e9;
}
table.def > tbody > tr:last-child th,
table.def > tbody > tr:last-child td {
border-bottom: 0;
}
table.def th {
font-style: italic;
font-weight: normal;
padding-left: 1em;
width: 3em;
}
/* For when values are extra-complex and need formatting for readability */
table td.pre {
white-space: pre-wrap;
}
/* A footnote at the bottom of a def table */
table.def td.footnote {
padding-top: 0.6em;
}
table.def td.footnote::before {
content: " ";
display: block;
height: 0.6em;
width: 4em;
border-top: thin solid;
}
/** Data tables (and properly marked-up index tables) *************************/
/*
<table class="data"> highlights structural relationships in a table
when correct markup is used (e.g. thead/tbody, th vs. td, scope attribute)
Use class="complex data" for particularly complicated tables --
(This will draw more lines: busier, but clearer.)
Use class="long" on table cells with paragraph-like contents
(This will adjust text alignment accordingly.)
Alternately use class="longlastcol" on tables, to have the last column assume "long".
*/
table {
word-wrap: normal;
overflow-wrap: normal;
hyphens: manual;
}
table.data,
table.index {
margin: 1em auto;
border-collapse: collapse;
border: hidden;
width: 100%;
}
table.data caption,
table.index caption {
max-width: 50em;
margin: 0 auto 1em;
}
table.data td, table.data th,
table.index td, table.index th {
padding: 0.5em 1em;
border-width: 1px;
border-color: silver;
border-top-style: solid;
}
table.data thead td:empty {
padding: 0;
border: 0;
}
table.data thead,
table.index thead,
table.data tbody,
table.index tbody {
border-bottom: 2px solid;
}
table.data colgroup,
table.index colgroup {
border-left: 2px solid;
}
table.data tbody th:first-child,
table.index tbody th:first-child {
border-right: 2px solid;
border-top: 1px solid silver;
padding-right: 1em;
}
table.data th[colspan],
table.data td[colspan] {
text-align: center;
}
table.complex.data th,
table.complex.data td {
border: 1px solid silver;
text-align: center;
}
table.data.longlastcol td:last-child,
table.data td.long {
vertical-align: baseline;
text-align: left;
}
table.data img {
vertical-align: middle;
}
/*
Alternate table alignment rules
table.data,
table.index {
text-align: center;
}
table.data thead th[scope="row"],
table.index thead th[scope="row"] {
text-align: right;
}
table.data tbody th:first-child,
table.index tbody th:first-child {
text-align: right;
}
Possible extra rowspan handling
table.data tbody th[rowspan]:not([rowspan='1']),
table.index tbody th[rowspan]:not([rowspan='1']),
table.data tbody td[rowspan]:not([rowspan='1']),
table.index tbody td[rowspan]:not([rowspan='1']) {
border-left: 1px solid silver;
}
table.data tbody th[rowspan]:first-child,
table.index tbody th[rowspan]:first-child,
table.data tbody td[rowspan]:first-child,
table.index tbody td[rowspan]:first-child{
border-left: 0;
border-right: 1px solid silver;
}
*/
/******************************************************************************/
/* Indices */
/******************************************************************************/
/** Table of Contents *********************************************************/
.toc a {
/* More spacing; use padding to make it part of the click target. */
padding-top: 0.1rem;
/* Larger, more consistently-sized click target */
display: block;
/* Reverse color scheme */
color: black;
border-color: #3980B5;
}
.toc a:visited {
border-color: #054572;
}
.toc a:not(:focus):not(:hover) {
/* Allow colors to cascade through from link styling */
border-bottom-color: transparent;
}
.toc, .toc ol, .toc ul, .toc li {
list-style: none; /* Numbers must be inlined into source */
/* because generated content isn't search/selectable and markers can't do multilevel yet */
margin: 0;
padding: 0;
line-height: 1.1rem; /* consistent spacing */
}
/* ToC not indented until third level, but font style & margins show hierarchy */
.toc > li { font-weight: bold; }
.toc > li li { font-weight: normal; }
.toc > li li li { font-size: 95%; }
.toc > li li li li { font-size: 90%; }
.toc > li li li li li { font-size: 85%; }
.toc > li { margin: 1.5rem 0; }
.toc > li li { margin: 0.3rem 0; }
.toc > li li li { margin-left: 2rem; }
/* Section numbers in a column of their own */
.toc .secno {
float: left;
width: 4rem;
white-space: nowrap;
}
.toc > li li li li .secno {
font-size: 85%;
}
.toc > li li li li li .secno {
font-size: 100%;
}
:not(li) > .toc { margin-left: 5rem; }
.toc .secno { margin-left: -5rem; }
.toc > li li li .secno { margin-left: -7rem; }
.toc > li li li li .secno { margin-left: -9rem; }
.toc > li li li li li .secno { margin-left: -11rem; }
/* Tighten up indentation in narrow ToCs */
@media (max-width: 30em) {
:not(li) > .toc { margin-left: 4rem; }
.toc .secno { margin-left: -4rem; }
.toc > li li li { margin-left: 1rem; }
.toc > li li li .secno { margin-left: -5rem; }