Simplified 'object-position' to just use <bg-position>, like radial gradients.

Author: tabatkins

css3-images/Overview.html

@@ -1768,9 +1768,7 @@ <h3 id=object-position><span class=secno>6.5. </span> Positioning Objects:
     <tr>
      <th>Value:
 
-     <td>[ [ &lt;percentage> | &lt;length> | left | center | right ] [
-      &lt;percentage> | &lt;length> | top | center | bottom ]? ] | [ [ left |
-      center | right ] || [ top | center | bottom ] ]
+     <td>&lt;bg-position>
 
     <tr>
      <th>Initial:
@@ -1805,12 +1803,12 @@ <h3 id=object-position><span class=secno>6.5. </span> Positioning Objects:
 
   <p>The &lsquo;<a href="#object-position0"><code
    class=property>object-position</code></a>&rsquo; property determines the
-   alignment of the replaced element inside its box. The values have the same
-   meaning as the values for the <a
-   href="http://w3.org/TR/CSS21/colors.html#propdef-background-position">&lsquo;<code
-   class=property>background-position</code>&rsquo;</a> property, using the
-   image as the image and the content box as the positioning area. <a
-   href="#CSS21" rel=biblioentry>[CSS21]<!--{{!CSS21}}--></a>
+   alignment of the replaced element inside its box.
+   <code>&lt;bg-position></code> comes from the <a
+   href="http://dev.w3.org/csswg/css3-background/#ltbg-positiongt">Backgrounds
+   &amp; Borders Module</a>, and is resolved in the same way, using the image
+   as the image and the content box as the positioning area. <a href="#CSS21"
+   rel=biblioentry>[CSS21]<!--{{!CSS21}}--></a>
 
   <p class=note>Note that areas of the box not covered by the replaced
    element will show the element's background.

css3-images/Overview.src.html

@@ -1242,8 +1242,7 @@ <h3 id="object-position">
 			<td><dfn>object-position</dfn>
 		<tr>
 			<th>Value:
-			<td>[ [ &lt;percentage> | &lt;length> | left | center | right ] [ &lt;percentage> | &lt;length> | top | center | bottom ]? ] | [
-			[ left | center | right ] || [ top | center | bottom ] ]
+			<td>&lt;bg-position>
 		<tr>
 			<th>Initial:
 			<td>50% 50%
@@ -1264,11 +1263,7 @@ <h3 id="object-position">
 			<td>specified value
 	</table>
 
-	<p>The 'object-position' property determines the alignment of the replaced
-	element inside its box. The values have the same meaning as the values for
-	the <a href="http://w3.org/TR/CSS21/colors.html#propdef-background-position">'background-position'</a>
-	property, using the image as the image and the content box as the positioning
-	area. [[!CSS21]]</p>
+	<p>The 'object-position' property determines the alignment of the replaced element inside its box. <code>&lt;bg-position></code> comes from the <a href="http://dev.w3.org/csswg/css3-background/#ltbg-positiongt">Backgrounds &amp; Borders Module</a>, and is resolved in the same way, using the image as the image and the content box as the positioning area. [[!CSS21]]</p>
 
 	<p class="note">Note that areas of the box not covered by the replaced
 	element will show the element's background.</p>