Update refs to the box model

Follow-up of w3c#3078.

Author: xfq

css-backgrounds-3/Overview.bs

@@ -1804,7 +1804,7 @@ the 'color' property. The fact that the
   <tr>
     <th>Percentages:
     <td>Refer to corresponding dimension of the
-        <a href="https://www.w3.org/TR/CSS2/box.html#box-dimensions">border box</a>.
+        <a>border box</a>.
   <tr>
     <th>Computed value:
     <td>two absolute <<length>> or percentages
@@ -1832,7 +1832,7 @@ the 'color' property. The fact that the
   <tr>
     <th>Percentages:
     <td>Refer to corresponding dimension of the
-        <a href="https://www.w3.org/TR/CSS2/box.html#box-dimensions">border box</a>.
+        <a>border box</a>.
   <tr>
     <th>Computed value:
     <td>see individual properties

css-break-3/Overview.bs

@@ -114,11 +114,7 @@ Fragmentation Model and Terminology</h2>
       A box in continuous flow always consists of only one fragment.
       A box in a fragmented flow consists of one or more fragments.
       Each fragment has its own share of the box’s border, padding, and margin,
-      and therefore has its own
-      <a href="https://www.w3.org/TR/CSS2/box.html#box-padding-area">padding area</a>,
-      <a href="https://www.w3.org/TR/CSS2/box.html#box-border-area">border area</a>,
-      and
-      <a href="https://www.w3.org/TR/CSS2/box.html#box-margin-area">margin area</a>.
+      and therefore has its own <a>padding area</a>, <a>border area</a>, and <a>margin area</a>.
       (See 'box-decoration-break', which controls how these are affected by fragmentation.)
     <dt><dfn>remaining fragmentainer extent</dfn></dt>
     <dd>

css-contain-1/Overview.bs

@@ -23,7 +23,6 @@ spec: css2; urlPrefix: https://www.w3.org/TR/CSS2/
 	type: value; for: content; url: generate.html#value-def-close-quote; text: close-quote
 	type: value; for: content; url: generate.html#value-def-no-open-quote; text: no-open-quote
 	type: value; for: content; url: generate.html#value-def-no-close-quote; text: no-close-quote
-	type: dfn; url: box.html#padding-edge; text: padding edge
 
 spec: css-backgrounds-3;
 	type: dfn; url: https://drafts.csswg.org/css-backgrounds-3/#corner-clipping; text: corner clipping

css-exclusions-1/Overview.bs

@@ -62,7 +62,7 @@ Terminology</h2>
     <dd>
       The area used for excluding inline flow content around an exclusion box. The
       <span>exclusion area</span> is equivalent to the
-      <a href="https://www.w3.org/TR/CSS2/box.html#box-dimensions">border box</a>
+      <a>border box</a>
       for an exclusion box.
 
       <p class="note">
@@ -88,8 +88,7 @@ Terminology</h2>
 
     <dt><dfn>Content area</dfn>
     <dd>
-      The <a href="https://www.w3.org/TR/CSS2/box.html#box-dimensions">content area</a>
-      is normally used for layout of the inline flow content of a box.
+      The <a>content area</a> is normally used for layout of the inline flow content of a box.
 
     <dt><dfn>Wrapping area</dfn>
     <dd>

css-page-3/Overview.bs

@@ -1035,9 +1035,7 @@ Page-Margin Box Layout Terminology</h4>
 			of the left and right page-margin boxes.
 
 		<dt><dfn>outer width</dfn>
-		<dd>The width of the
-			<a href="https://www.w3.org/TR/CSS21/box.html#outer-edge">outer edge</a>,
-			as defined in [[!CSS21]].
+		<dd>The width of the <a>outer edge</a>, as defined in [[!CSS-BOX-3]].
 
 		<dt><dfn>min-content width</dfn>
 		<dd>Whichever of <a spec=css-sizing>min-content block size</a>

css-regions-1/Overview.bs

@@ -1269,7 +1269,7 @@ The Region interface</h3>
 		<dd>
 			The region's flow fragment content
 			fits into the region's
-			<a href="https://www.w3.org/TR/CSS21/box.html#box-dimensions">content box</a>.
+			<a>content box</a>.
 			If the region is the <a>last usable region</a>
 			in the <a>region chain</a>,
 			it means that the content

css-shapes-1/Overview.bs

@@ -114,7 +114,7 @@ Terminology</h3>
 	to determine where content flows.
 	By default,
 	the <a>float area</a> is the float element's
-	<a href="https://www.w3.org/TR/CSS2/box.html#box-dimensions">margin box</a>
+	<a>margin box</a>
 	(note this can be different than
 	the <a>float area</a> produced
 	by the ''margin-box'' value,

css-shapes-2/Overview.bs

@@ -66,7 +66,7 @@ Terminology</h2>
 	around an exclusion box.
 	The <span>exclusion area</span>
 	is equivalent to the
-	<a href="https://www.w3.org/TR/CSS2/box.html#box-dimensions">border box</a>
+	<a>border box</a>
 	for an exclusion box.
 	This specification's 'shape-outside' property
 	can be used to define arbitrary,
@@ -84,14 +84,14 @@ Terminology</h2>
 	By default,
 	the float area is
 	the float element's
-	<a href="https://www.w3.org/TR/CSS2/box.html#box-dimensions">margin box</a>.
+	<a>margin box</a>.
 	This specification's 'shape-outside' property
 	can be used to define arbitrary,
 	non-rectangular float areas.
 
 	<dfn>Content area</dfn>
 
-	The <a href="https://www.w3.org/TR/CSS2/box.html#box-dimensions">content area</a>
+	The <a>content area</a>
 	is normally used for layout of the inline flow content of a box.
 
 
@@ -143,14 +143,14 @@ Supported Shapes</h3>
 					or ''evenodd''.
 					Default value when omitted is ''nonzero''.</li>
 				<li>
-					The <string> represents an 
-					<a href="https://www.w3.org/TR/SVG11/paths.html#PathData">SVG Path data string</a>. 
-					The path data string must be conform 
-					to the grammar and parsing rules of SVG 1.1. 
-					The initial position is defined 
-					by the first “move to” argument 
-					in the path string. 
-					For the initial direction follow SVG 1.1. 
+					The <string> represents an
+					<a href="https://www.w3.org/TR/SVG11/paths.html#PathData">SVG Path data string</a>.
+					The path data string must be conform
+					to the grammar and parsing rules of SVG 1.1.
+					The initial position is defined
+					by the first “move to” argument
+					in the path string.
+					For the initial direction follow SVG 1.1.
 				</li>
 			</ul>
 		</dd>
@@ -339,8 +339,8 @@ The 'shape-inside' Property</h4>
 	<dl>
 		<dt><dfn for=shape-inside>''outside-shape''</dfn></dt>
 		<dd>
-			The shape is computed based on 
-			the shape defined by the shape-outside 
+			The shape is computed based on
+			the shape defined by the shape-outside
 			and shape-margin properties.
 		</dd>
 	</dl>
@@ -391,8 +391,8 @@ The 'shape-inside' Property</h4>
 	by 'shape-inside' and 'shape-padding'
 	(as well as any other exclusion areas
 	in the element's wrapping context).
-	In other words, 
-	overflow continues outside 
+	In other words,
+	overflow continues outside
 	the rectangular bounds of the element.</p>
 
 	<div class='figure'>
@@ -408,7 +408,7 @@ The 'shape-inside' Property</h4>
 		</p>
 	</div>
 
-	Issue: improve the illustration above, 
+	Issue: improve the illustration above,
 	using text to show overflow instead of greeked boxes.
 
 	When a shape-inside has a definite size

css-ui-3/Overview.bs

@@ -81,7 +81,6 @@ spec:css2; type:property; text:background-image
 <!-- Some of the following definitions have existing exported defintions from other specs,
 but not from specs that are OK to link to from a CR -->
 <pre class="anchors">
-url: https://www.w3.org/TR/CSS2/box.html#border-edge; type: dfn; spec: CSS2; text: border edge
 url: https://www.w3.org/TR/CSS2/visufx.html#propdef-overflow
     type: property; spec: CSS2; text: overflow
     type: value; spec: CSS2; text: visible; for: overflow
@@ -142,14 +141,14 @@ this specification links directly to these terms where relevant.
 
 <h3 id="box-sizing" caniuse="css3-boxsizing">Changing the Box Model: the 'box-sizing' property</h3>
 
-<pre class="propdef"> 
-Name: box-sizing 
+<pre class="propdef">
+Name: box-sizing
 Value: content-box | border-box
-Initial: content-box 
-Applies to: all elements that accept width or height 
-Inherited: no 
-Percentages: N/A 
-Computed value: specified value 
+Initial: content-box
+Applies to: all elements that accept width or height
+Inherited: no
+Percentages: N/A
+Computed value: specified value
 </pre>
 
 <dl dfn-type=value dfn-for=box-sizing>
@@ -292,55 +291,55 @@ The rendering of applying transforms to outlines is left explicitly undefined in
 
 <h3 id="outline">Outlines Shorthand: the 'outline' property</h3>
 
-<pre class="propdef"> 
-Name: outline 
+<pre class="propdef">
+Name: outline
 Value: [ <<'outline-color'>> || <<'outline-style'>> || <<'outline-width'>> ]
-Initial: see individual properties 
-Applies to: all elements 
-Inherited: no 
-Percentages: N/A 
-Computed value: see individual properties 
-Animation type: see individual properties 
+Initial: see individual properties
+Applies to: all elements
+Inherited: no
+Percentages: N/A
+Computed value: see individual properties
+Animation type: see individual properties
 </pre>
 
 <h3 id="outline-width">Outline Thickness: the 'outline-width' property</h3>
 
-<pre class="propdef"> 
-Name: outline-width 
+<pre class="propdef">
+Name: outline-width
 Value: <<line-width>>
-Initial: medium 
-Applies to: all elements 
-Inherited: no 
-Percentages: N/A 
+Initial: medium
+Applies to: all elements
+Inherited: no
+Percentages: N/A
 Computed value: absolute length; ''0'' if the outline style is ''border-style/none''.
 Animation type: <a href="https://drafts.csswg.org/css3-transitions/#animtype-length">length</a>
 </pre>
 
 <h3 id="outline-style">Outline Patterns: the 'outline-style' property</h3>
 
-<pre class="propdef"> 
-Name: outline-style 
-Value: auto | <'border-style'> 
-Initial: none 
-Applies to: all elements 
-Inherited: no 
-Percentages: N/A 
+<pre class="propdef">
+Name: outline-style
+Value: auto | <'border-style'>
+Initial: none
+Applies to: all elements
+Inherited: no
+Percentages: N/A
 Computed value: as specified
 </pre>
 
 <h3 id="outline-color">Outline Colors: the 'outline-color' property</h3>
 
-<pre class="propdef"> 
-Name: outline-color 
-Value: <<color>> | invert 
-Initial: invert 
-Applies to: all elements 
-Inherited: no 
-Percentages: N/A 
+<pre class="propdef">
+Name: outline-color
+Value: <<color>> | invert
+Initial: invert
+Applies to: all elements
+Inherited: no
+Percentages: N/A
 Computed value: The computed value for ''outline-color/invert'' is ''outline-color/invert'';
 	the computed value of ''outline-color/currentColor'' is ''outline-color/currentColor'' (See [[CSS-COLOR-3/#currentColor]]);
 	see the 'color' property for other <<color>> values.
-Animation Type: <a href="https://drafts.csswg.org/css3-transitions/#animtype-color">color</a> 
+Animation Type: <a href="https://drafts.csswg.org/css3-transitions/#animtype-color">color</a>
 </pre>
 
 The outline created with the outline properties is drawn "over" a box,
@@ -460,15 +459,15 @@ it may well overlap other elements on the page.
 By default, the outline is drawn starting just outside the <a>border edge</a>.
 However, it is possible to offset the outline and draw it beyond the <a>border edge</a>.
 
-<pre class="propdef"> 
-Name: outline-offset 
-Value: <<length>> 
-Initial: 0 
-Applies to: all elements 
-Inherited: no 
-Percentages: N/A 
-Computed value: <<length>> value in absolute units (px or physical). 
-Animation Type: <a href="https://drafts.csswg.org/css3-transitions/#animtype-length">length</a> 
+<pre class="propdef">
+Name: outline-offset
+Value: <<length>>
+Initial: 0
+Applies to: all elements
+Inherited: no
+Percentages: N/A
+Computed value: <<length>> value in absolute units (px or physical).
+Animation Type: <a href="https://drafts.csswg.org/css3-transitions/#animtype-length">length</a>
 </pre>
 
 If the computed value of 'outline-offset'
@@ -513,14 +512,14 @@ The 'resize' property allows the author
 to specify whether or not an element is resizable by the user,
 and if so, along which axis/axes.
 
-<pre class="propdef"> 
-Name: resize 
-Value: none | both | horizontal | vertical 
-Initial: none 
+<pre class="propdef">
+Name: resize
+Value: none | both | horizontal | vertical
+Initial: none
 Applies to: elements with 'overflow' other than visible,
- and optionally replaced elements such as images, videos, and iframes 
-Inherited: no 
-Percentages: N/A 
+ and optionally replaced elements such as images, videos, and iframes
+Inherited: no
+Percentages: N/A
 Computed value: as specified
 </pre>
 
@@ -918,8 +917,8 @@ While the content is being scrolled, implementations may adjust their rendering
 <h3 id="pointer-interaction">Pointer interaction</h3>
 
 <h4 id="cursor" caniuse="css3-cursors">Styling the Cursor: the 'cursor' property</h4>
-<pre class="propdef"> 
-Name: cursor 
+<pre class="propdef">
+Name: cursor
 Value: [ [<<url>> [&lt;x&gt; &lt;y&gt;]?,]* <br>
  [ auto | default | none |<br>
  context-menu | help | pointer | progress | wait | <br>
@@ -930,12 +929,12 @@ Value: [ [<<url>> [&lt;x&gt; &lt;y&gt;]?,]* <br>
  col-resize | row-resize |
  all-scroll |<br>
  zoom-in | zoom-out <br>
- ] ] 
-Initial: auto 
-Applies to: all elements 
-Inherited: yes 
-Percentages: N/A 
-Computed value: as specified, except with any relative URLs converted to absolute 
+ ] ]
+Initial: auto
+Applies to: all elements
+Inherited: yes
+Percentages: N/A
+Computed value: as specified, except with any relative URLs converted to absolute
 </pre>
 
 This property specifies the type of cursor to be displayed for the pointing device
@@ -1238,17 +1237,17 @@ boxes are generated for it and its cursor is used for the canvas.
 <h3 id="insertion-caret">Insertion caret</h3>
 
 <h4 id="caret-color" caniuse="css-caret-color">Coloring the Insertion Caret: the 'caret-color' property</h4>
-<pre class="propdef"> 
-Name: caret-color 
-Value: auto | <<color>> 
-Initial: auto 
+<pre class="propdef">
+Name: caret-color
+Value: auto | <<color>>
+Initial: auto
 Applies to: all elements
-Inherited: yes 
-Percentages: N/A 
+Inherited: yes
+Percentages: N/A
 Computed value: The computed value for ''caret-color/auto'' is ''caret-color/auto'';
 	the computed value of ''caret-color/currentColor'' is ''cart-color/currentColor'' (See [[CSS-COLOR-3/#currentColor]]);
 	see the 'color' property for other <<color>> values.
-Animation Type: <a href="https://drafts.csswg.org/css3-transitions/#animtype-color">color</a> 
+Animation Type: <a href="https://drafts.csswg.org/css3-transitions/#animtype-color">color</a>
 </pre>
 
 <dl>