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[css-values] Add IDs to avoid breaking links. Export functional notation.
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‎css-values/Overview.bs‎

Lines changed: 29 additions & 29 deletions
Original file line numberDiff line numberDiff line change
@@ -501,7 +501,7 @@ Quoted Strings: the <<string>> type</h3>
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Resource Locators: the <<url>> type</h3>
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A <dfn>URL</dfn> is a pointer to a resource
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and is a <a href="#functional-notation">functional notation</a>
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and is a <a>functional notation</a>
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denoted by <<url>>.
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The syntax of a <<url>> is:
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@@ -827,7 +827,7 @@ Font-relative lengths: the ''em'', ''ex'', ''ch'', ''rem'' units</h4>
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if the element has no parent).
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<dl export dfn-type=value dfn-for="<length>">
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<dt><dfn lt="em">em unit</dfn>
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<dt><dfn id="em" lt="em">em unit</dfn>
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<dd>
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Equal to the computed value of the 'font-size' property of the element on which it is used.
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@@ -846,7 +846,7 @@ Font-relative lengths: the ''em'', ''ex'', ''ch'', ''rem'' units</h4>
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will be 20% greater than the computed font size inherited by <code>h1</code> elements.
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</div>
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<dt><dfn lt="ex">ex unit</dfn>
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<dt><dfn id="ex" lt="ex">ex unit</dfn>
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<dd>
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Equal to the used x-height of the <a href="https://www.w3.org/TR/css3-fonts/#first-available-font">first available font</a> [[!CSS3-FONTS]].
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The x-height is so called because it is often equal to the height of the lowercase "x".
@@ -860,7 +860,7 @@ Font-relative lengths: the ''em'', ''ex'', ''ch'', ''rem'' units</h4>
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where it is impossible or impractical to determine the x-height,
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a value of 0.5em must be assumed.
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<dt><dfn lt="ch">ch unit</dfn>
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<dt><dfn id="ch" lt="ch">ch unit</dfn>
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<dd>
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Equal to the used <a>advance measure</a> of the "0" (ZERO, U+0030) glyph
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found in the font used to render it.
@@ -877,7 +877,7 @@ Font-relative lengths: the ''em'', ''ex'', ''ch'', ''rem'' units</h4>
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(i.e. 'writing-mode' is ''vertical-rl'' or ''vertical-lr''
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and 'text-orientation' is ''text-orientation/upright'').
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<dt><dfn lt="rem">rem unit</dfn>
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<dt><dfn id="rem" lt="rem">rem unit</dfn>
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<dd>
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Equal to the computed value of 'font-size' on the root element.
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When specified on the 'font-size' property of the root element,
@@ -909,7 +909,7 @@ Viewport-percentage lengths: the ''vw'', ''vh'', ''vmin'', ''vmax'' units</h4>
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is deferred to [[!CSS3PAGE]].
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<dl export dfn-type=value dfn-for="<length>">
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<dt><dfn lt="vw">vw unit</dfn>
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<dt><dfn id="vw" lt="vw">vw unit</dfn>
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<dd>
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Equal to 1% of the width of the initial containing block.
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@@ -921,15 +921,15 @@ Viewport-percentage lengths: the ''vw'', ''vh'', ''vmin'', ''vmax'' units</h4>
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<pre>h1 { font-size: 8vw }</pre>
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</div>
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<dt><dfn lt="vh">vh unit</dfn>
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<dt><dfn id="vh" lt="vh">vh unit</dfn>
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<dd>
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Equal to 1% of the height of the initial containing block.
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<dt><dfn lt="vmin">vmin unit</dfn>
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<dt><dfn id="vmin" lt="vmin">vmin unit</dfn>
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<dd>
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Equal to the smaller of ''vw'' or ''vh''.
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<dt><dfn lt="vmax">vmax unit</dfn>
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<dt><dfn id="vmax" lt="vmax">vmax unit</dfn>
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<dd>
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Equal to the larger of ''vw'' or ''vh''.
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</dl>
@@ -960,25 +960,25 @@ Absolute lengths: the ''cm'', ''mm'', ''q'', ''in'', ''pt'', ''pc'', ''px'' unit
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<th>name
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<th>equivalence
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<tbody dfn-type=value dfn-for="<length>">
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<tr><th><dfn>cm</dfn>
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<tr><th><dfn id="cm">cm</dfn>
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<td>centimeters
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<td>1cm = 96px/2.54
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<tr><th><dfn>mm</dfn>
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<tr><th><dfn id="mm">mm</dfn>
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<td>millimeters
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<td>1mm = 1/10th of 1cm
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<tr><th><dfn>q</dfn>
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<tr><th><dfn id="q">Q</dfn>
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<td>quarter-millimeters
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<td>1q = 1/40th of 1cm
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<tr><th><dfn>in</dfn>
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<tr><th><dfn id="in">in</dfn>
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<td>inches
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<td>1in = 2.54cm = 96px
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<tr><th><dfn>pc</dfn>
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<tr><th><dfn id="pc">pc</dfn>
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<td>picas
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<td>1pc = 1/6th of 1in
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<tr><th><dfn>pt</dfn>
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<tr><th><dfn id="pt">pt</dfn>
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<td>points
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<td>1pt = 1/72th of 1in
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<tr><th><dfn lt="px|pixel unit">px</dfn>
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<tr><th><dfn id="px" lt="px|pixel unit">px</dfn>
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<td>pixels
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<td>1px = 1/96th of 1in
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</table>
@@ -1094,20 +1094,20 @@ Angle Units: the <<angle>> type and ''deg'', ''grad'', ''rad'', ''turn'' units</
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The angle unit identifiers are:
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<dl export dfn-type=value dfn-for="<angle>">
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<dt><dfn>deg</dfn>
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<dt><dfn id="deg">deg</dfn>
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<dd>
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Degrees. There are 360 degrees in a full circle.
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<dt><dfn>grad</dfn>
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<dt><dfn id="grad">grad</dfn>
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<dd>
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Gradians, also known as "gons" or "grades".
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There are 400 gradians in a full circle.
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<dt><dfn>rad</dfn>
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<dt><dfn id="rad">rad</dfn>
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<dd>
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Radians. There are 2&pi; radians in a full circle.
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<dt><dfn>turn</dfn>
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<dt><dfn id="turn">turn</dfn>
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<dd>
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Turns. There is 1 turn in a full circle.
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</dl>
@@ -1145,9 +1145,9 @@ Duration Units: the <<time>> type and ''s'', ''ms'' units</h3>
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The time unit identifiers are:
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<dl export dfn-type=value dfn-for="<time>">
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<dt><dfn>s</dfn>
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<dt><dfn id="s">s</dfn>
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<dd>Seconds.
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<dt><dfn>ms</dfn>
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<dt><dfn id="ms">ms</dfn>
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<dd>Milliseconds. There are 1000 milliseconds in a second.
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</dl>
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@@ -1172,9 +1172,9 @@ Frequency Units: the <<frequency>> type and ''Hz'', ''kHz'' units</h3>
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The frequency unit identifiers are:
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<dl export dfn-type=value dfn-for="<frequency>">
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<dt><dfn>Hz</dfn>
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<dt><dfn id="Hz">Hz</dfn>
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<dd>Hertz. It represents the number of occurrences per second.
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<dt><dfn>kHz</dfn>
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<dt><dfn id="kHz>kHz</dfn>
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<dd>KiloHertz. A kiloHertz is 1000 Hertz.
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</dl>
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@@ -1198,13 +1198,13 @@ Resolution Units: the <<resolution>> type and ''dpi'', ''dpcm'', ''dppx'' units<
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The resolution unit identifiers are:
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<dl export dfn-type=value dfn-for="<frequency>">
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<dt><dfn>dpi</dfn>
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<dt><dfn id="dpi">dpi</dfn>
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<dd>Dots per inch.
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<dt><dfn>dpcm</dfn>
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<dt><dfn id="dpcm">dpcm</dfn>
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<dd>Dots per centimeter.
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<dt><dfn>dppx</dfn>
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<dt><dfn id="dppx">dppx</dfn>
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<dd>Dots per ''px'' unit.
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</dl>
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@@ -1283,7 +1283,7 @@ Images: the <<image>> type</h3>
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<h2 id="functional-notations">
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Functional Notations</h2>
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A <dfn>functional notation</dfn> is a type of component value
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A <dfn export>functional notation</dfn> is a type of component value
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that can represent more complex types or invoke special processing.
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The syntax starts with the name of the function
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immediately followed by a left parenthesis
@@ -1295,7 +1295,7 @@ Functional Notations</h2>
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Functions can take multiple arguments,
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which are formatted similarly to a CSS property value.
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Some legacy functional notations, such as ''rgba()'', use commas unnecessarily,
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Some legacy <a>functional notations</a>, such as ''rgba()'', use commas unnecessarily,
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but generally commas are only used to separate items in a list,
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or pieces of a grammar that would be ambiguous otherwise.
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If a comma is used to separate arguments,

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