--- a/master/shapes.html	Mon Sep 23 15:15:48 2013 +1000
+++ b/master/shapes.html	Mon Sep 23 17:04:09 2013 +1000
@@ -106,133 +106,106 @@
 -->
 <edit:elementsummary name='rect'/>
 
-    <div class="adef-list">
-      <p><em>Attribute definitions:</em></p>
-      <dl>
-        <dt id="RectElementXAttribute"><span
-        class="adef">x</span> = "<span class="attr-value"><a
-        href="types.html#DataTypeLength">&lt;length&gt;</a></span>"</dt>
-        <dd>The x-axis coordinate of the side of the rectangle
-        which has the smaller x-axis coordinate value in the
-        current user coordinate system.<br />
-         If the attribute is not specified, the effect is as if a
-        value of "0" were specified.<br />
-         <span class="anim-target"><a
-        href="animate.html#Animatable">Animatable</a>:
-        yes.</span></dd>
-        <dt id="RectElementYAttribute"><span
-        class="adef">y</span> = "<span class="attr-value"><a
-        href="types.html#DataTypeLength">&lt;length&gt;</a></span>"</dt>
-        <dd>The y-axis coordinate of the side of the rectangle
-        which has the smaller y-axis coordinate value in the
-        current user coordinate system.<br />
-         If the attribute is not specified, the effect is as if a
-        value of "0" were specified.<br />
-         <span class="anim-target"><a
-        href="animate.html#Animatable">Animatable</a>:
-        yes.</span></dd>
-        <dt id="RectElementWidthAttribute"><span
-        class="adef">width</span> = "<span class="attr-value"><a
-        href="types.html#DataTypeLength">&lt;length&gt;</a></span>"</dt>
-        <dd>The width of the rectangle.<br />
-         A negative value is an error (see <a
-        href="implnote.html#ErrorProcessing">Error processing</a>).
-        A value of zero disables rendering of the element.<br />
-         <span class="anim-target"><a
-        href="animate.html#Animatable">Animatable</a>:
-        yes.</span></dd>
-        <dt id="RectElementHeightAttribute"><span
-        class="adef">height</span> = "<span class="attr-value"><a
-        href="types.html#DataTypeLength">&lt;length&gt;</a></span>"</dt>
-        <dd>The height of the rectangle.<br />
-         A negative value is an error (see <a
-        href="implnote.html#ErrorProcessing">Error processing</a>).
-        A value of zero disables rendering of the element.<br />
-         <span class="anim-target"><a
-        href="animate.html#Animatable">Animatable</a>:
-        yes.</span></dd>
-        <dt id="RectElementRXAttribute"><span
-        class="adef">rx</span> = "<span class="attr-value"><a
-        href="types.html#DataTypeLength">&lt;length&gt;</a></span>"</dt>
-        <dd>For rounded rectangles, the x-axis radius of the
-        ellipse used to round off the corners of the
-        rectangle.<br />
-         A negative value is an error (see <a
-        href="implnote.html#ErrorProcessing">Error
-        processing</a>).<br />
-         See the notes below about what happens if the attribute is
-        not specified.<br />
-         <span class="anim-target"><a
-        href="animate.html#Animatable">Animatable</a>:
-        yes.</span></dd>
-        <dt id="RectElementRYAttribute"><span
-        class="adef">ry</span> = "<span class="attr-value"><a
-        href="types.html#DataTypeLength">&lt;length&gt;</a></span>"</dt>
-        <dd>For rounded rectangles, the y-axis radius of the
-        ellipse used to round off the corners of the
-        rectangle.<br />
-         A negative value is an error (see <a
-        href="implnote.html#ErrorProcessing">Error
-        processing</a>).<br />
-         See the notes below about what happens if the attribute is
-        not specified.<br />
-         <span class="anim-target"><a
-        href="animate.html#Animatable">Animatable</a>:
-        yes.</span></dd>
-      </dl>
-    </div>
+<p><em>Attribute definitions:</em></p>
 
-<!--
-<p>If a properly specified value is provided for <a>'rx'</a>
-but not for <a>'ry'</a>, then the user agent processes the
-<a>'rect'</a> element with the effective value for <a>'ry'</a> as
-equal to <a>'rx'</a>. If a properly specified value is provided for
-<a>'ry'</a> but not for <a>'rx'</a>, then the user agent processes
-the <a>'rect'</a> element with the effective value for <a>'rx'</a>
-as equal to <a>'ry'</a>. If neither <a>'rx'</a> nor <a>'ry'</a>
-has a properly specified value, then the user agent processes
-the <a>'rect'</a> element as if no rounding had been specified,
-resulting in square corners. If <a>'rx'</a> is greater than half
-of the width of the rectangle, then the user agent processes the
-<a>'rect'</a> element with the effective value for <a>'rx'</a> as
-half of the width of the rectangle. If <a>'ry'</a> is greater than
-half of the height of the rectangle, then the user agent processes
-the <a>'rect'</a> element with the effective value for <a>'ry'</a>
-as half of the height of the rectangle.</p>
--->
+<dl class="attrdef-list">
+  <dt>
+    <table class="propdef attrdef">
+      <tr>
+        <th>Name</th>
+        <th>Value</th>
+        <th>Lacuna value</th>
+        <th>Animatable</th>
+      </tr>
+      <tr>
+        <td><dfn id="RectElementXAttribute">x</dfn>, <dfn id="RectElementYAttribute">y</dfn></td>
+        <td><a>&lt;length&gt;</a></td>
+        <td>0</td>
+        <td>yes</td>
+      </tr>
+    </table>
+  </dt>
+  <dd>
+    The coordinates of the left and top edges of the rectangle, in the current
+    user coordinate system.
+  </dd>
+  <dt>
+    <table class="propdef attrdef">
+      <tr>
+        <th>Name</th>
+        <th>Value</th>
+        <th>Lacuna value</th>
+        <th>Animatable</th>
+      </tr>
+      <tr>
+        <td><dfn id="RectElementWidthAttribute">width</dfn>, <dfn id="RectElementHeightAttribute">height</dfn></td>
+        <td><a>&lt;length&gt;</a></td>
+        <td>0</td>
+        <td>yes</td>
+      </tr>
+    </table>
+  </dt>
+  <dd>
+    The width and height of the rectangle.  A negative value for either
+    attribute is an error (see <a href="implnote.html#ErrorProcessing">Error processing</a>).
+    A value of zero for either attribute disables rendering of the element.
+  </dd>
+  <dt>
+    <table class="propdef attrdef">
+      <tr>
+        <th>Name</th>
+        <th>Value</th>
+        <th>Lacuna value</th>
+        <th>Animatable</th>
+      </tr>
+      <tr>
+        <td><dfn id="RectElementRXAttribute">rx</dfn>, <dfn id="RectElementRYAttribute">ry</dfn></td>
+        <td><a>&lt;length&gt;</a></td>
+        <td>(see below)</td>
+        <td>yes</td>
+      </tr>
+    </table>
+  </dt>
+  <dd>
+    <p>For rounded rectangles, the x- and y-axis radii of the
+    ellipse used to round off the corners of the rectangle.
+    A negative value for either attribute is an error
+    (see <a href="implnote.html#ErrorProcessing">Error processing</a>).</p>
 
-<p>The values used for the x- and y-axis rounded corner radii are
-determined implicitly if the <a>'rx'</a> or <a>'ry'</a> attributes (or both)
-are not specified, or are specified but with invalid values.
-The values are also subject to clamping so that the lengths of
-the straight segments of the rectangle are never negative.  The
-effective values for <a>'rx'</a> and <a>'ry'</a> are determined by following
-these steps in order:</p>
-
-<ol>
-  <li>Let <var>rx</var> and <var>ry</var> be length values.</li>
-
-  <li>If neither <a>'rx'</a> nor <a>'ry'</a> are properly specified, then set both
-  <var>rx</var> and <var>ry</var> to 0.  (This will result in square corners.)</li>
+    <p>The values used for the x- and y-axis rounded corner radii are
+    determined implicitly if the <a>'rx'</a> or <a>'ry'</a> attributes (or both)
+    are not specified, or are specified but with invalid values.
+    The values are also subject to clamping so that the lengths of
+    the straight segments of the rectangle are never negative.  The
+    effective values for <a>'rx'</a> and <a>'ry'</a> are determined by following
+    these steps in order:</p>
 
-  <li>Otherwise, if a properly specified value is provided for <a>'rx'</a>, but
-  not for <a>'ry'</a>, then set both <var>rx</var> and <var>ry</var> to the value of <a>'rx'</a>.</li>
-
-  <li>Otherwise, if a properly specified value is provided for <a>'ry'</a>, but
-  not for <a>'rx'</a>, then set both <var>rx</var> and <var>ry</var> to the value of <a>'ry'</a>.</li>
-
-  <li>Otherwise, both <a>'rx'</a> and <a>'ry'</a> were specified properly.  Set <var>rx</var> to
-  the value of <a>'rx'</a> and <var>ry</var> to the value of <a>'ry'</a>.</li>
+    <ol>
+      <li>Let <var>rx</var> and <var>ry</var> be length values.</li>
 
-  <li>If <var>rx</var> is greater than half of <a>'width'</a>, then set
-  <var>rx</var> to half of <a>'width'</a>.</li>
+      <li>If neither <a>'rx'</a> nor <a>'ry'</a> are properly specified, then set both
+      <var>rx</var> and <var>ry</var> to 0.  (This will result in square corners.)</li>
 
-  <li>If <var>ry</var> is greater than half of <a>'height'</a>, then set
-  <var>ry</var> to half of <a>'height'</a>.</li>
+      <li>Otherwise, if a properly specified value is provided for <a>'rx'</a>, but
+      not for <a>'ry'</a>, then set both <var>rx</var> and <var>ry</var> to the value of <a>'rx'</a>.</li>
 
-  <li>The effective values of <a>'rx'</a> and <a>'ry'</a> are <var>rx</var> and
-  <var>ry</var>, respectively.</li>
-</ol>
+      <li>Otherwise, if a properly specified value is provided for <a>'ry'</a>, but
+      not for <a>'rx'</a>, then set both <var>rx</var> and <var>ry</var> to the value of <a>'ry'</a>.</li>
+
+      <li>Otherwise, both <a>'rx'</a> and <a>'ry'</a> were specified properly.  Set <var>rx</var> to
+      the value of <a>'rx'</a> and <var>ry</var> to the value of <a>'ry'</a>.</li>
+
+      <li>If <var>rx</var> is greater than half of <a>'width'</a>, then set
+      <var>rx</var> to half of <a>'width'</a>.</li>
+
+      <li>If <var>ry</var> is greater than half of <a>'height'</a>, then set
+      <var>ry</var> to half of <a>'height'</a>.</li>
+
+      <li>The effective values of <a>'rx'</a> and <a>'ry'</a> are <var>rx</var> and
+      <var>ry</var>, respectively.</li>
+    </ol>
+  </dd>
+</dl>
 
 <p>Mathematically, a <a>'rect'</a> element can be mapped to an
 equivalent <a>'path'</a> element as follows: (Note: all coordinate and
@@ -307,41 +280,48 @@
 
 <edit:elementsummary name='circle'/>
 
-    <div class="adef-list">
-      <p><em>Attribute definitions:</em></p>
-      <dl>
-        <dt id="CircleElementCXAttribute"><span
-        class="adef">cx</span> = "<span class="attr-value"><a
-        href="types.html#DataTypeLength">&lt;length&gt;</a></span>"</dt>
-        <dd>The x-axis coordinate of the center of the
-        circle.<br />
-         If the attribute is not specified, the effect is as if a
-        value of "0" were specified.<br />
-         <span class="anim-target"><a
-        href="animate.html#Animatable">Animatable</a>:
-        yes.</span></dd>
-        <dt id="CircleElementCYAttribute"><span
-        class="adef">cy</span> = "<span class="attr-value"><a
-        href="types.html#DataTypeLength">&lt;length&gt;</a></span>"</dt>
-        <dd>The y-axis coordinate of the center of the
-        circle.<br />
-         If the attribute is not specified, the effect is as if a
-        value of "0" were specified.<br />
-         <span class="anim-target"><a
-        href="animate.html#Animatable">Animatable</a>:
-        yes.</span></dd>
-        <dt id="CircleElementRAttribute"><span
-        class="adef">r</span> = "<span class="attr-value"><a
-        href="types.html#DataTypeLength">&lt;length&gt;</a></span>"</dt>
-        <dd>The radius of the circle.<br />
-         A negative value is an error (see <a
-        href="implnote.html#ErrorProcessing">Error processing</a>).
-        A value of zero disables rendering of the element.<br />
-         <span class="anim-target"><a
-        href="animate.html#Animatable">Animatable</a>:
-        yes.</span></dd>
-      </dl>
-    </div>
+<p><em>Attribute definitions:</em></p>
+
+<dl class="attrdef-list">
+  <dt>
+    <table class="propdef attrdef">
+      <tr>
+        <th>Name</th>
+        <th>Value</th>
+        <th>Lacuna value</th>
+        <th>Animatable</th>
+      </tr>
+      <tr>
+        <td><dfn id="CircleElementCXAttribute">cx</dfn>, <dfn id="CircleElementCYAttribute">cy</dfn></td>
+        <td><a>&lt;length&gt;</a></td>
+        <td>0</td>
+        <td>yes</td>
+      </tr>
+    </table>
+  </dt>
+  <dd>
+    The coordinates of the center of the circle.
+  </dd>
+  <dt>
+    <table class="propdef attrdef">
+      <tr>
+        <th>Name</th>
+        <th>Value</th>
+        <th>Lacuna value</th>
+        <th>Animatable</th>
+      </tr>
+      <tr>
+        <td><dfn id="RectElementRAttribute">r</dfn></td>
+        <td><a>&lt;length&gt;</a></td>
+        <td>0</td>
+        <td>yes</td>
+      </tr>
+    </table>
+  </dt>
+  <dd>The radius of the circle.  A negative value is an error (see
+  <a href="implnote.html#ErrorProcessing">Error processing</a>).
+  A value of zero disables rendering of the element.</dd>
+</dl>
 
 <p>The arc of a <a>'circle'</a> element begins at the "3 o'clock" point
 on the radius and progresses towards the "9 o'clock" point. The starting
@@ -371,51 +351,51 @@
 
 <edit:elementsummary name='ellipse'/>
 
-    <div class="adef-list">
-      <p><em>Attribute definitions:</em></p>
-      <dl>
-        <dt id="EllipseElementCXAttribute"><span
-        class="adef">cx</span> = "<span class="attr-value"><a
-        href="types.html#DataTypeLength">&lt;length&gt;</a></span>"</dt>
-        <dd>The x-axis coordinate of the center of the
-        ellipse.<br />
-         If the attribute is not specified, the effect is as if a
-        value of "0" were specified.<br />
-         <span class="anim-target"><a
-        href="animate.html#Animatable">Animatable</a>:
-        yes.</span></dd>
-        <dt id="EllipseElementCYAttribute"><span
-        class="adef">cy</span> = "<span class="attr-value"><a
-        href="types.html#DataTypeLength">&lt;length&gt;</a></span>"</dt>
-        <dd>The y-axis coordinate of the center of the
-        ellipse.<br />
-         If the attribute is not specified, the effect is as if a
-        value of "0" were specified.<br />
-         <span class="anim-target"><a
-        href="animate.html#Animatable">Animatable</a>:
-        yes.</span></dd>
-        <dt id="EllipseElementRXAttribute"><span
-        class="adef">rx</span> = "<span class="attr-value"><a
-        href="types.html#DataTypeLength">&lt;length&gt;</a></span>"</dt>
-        <dd>The x-axis radius of the ellipse.<br />
-         A negative value is an error (see <a
-        href="implnote.html#ErrorProcessing">Error processing</a>).
-        A value of zero disables rendering of the element.<br />
-         <span class="anim-target"><a
-        href="animate.html#Animatable">Animatable</a>:
-        yes.</span></dd>
-        <dt id="EllipseElementRYAttribute"><span
-        class="adef">ry</span> = "<span class="attr-value"><a
-        href="types.html#DataTypeLength">&lt;length&gt;</a></span>"</dt>
-        <dd>The y-axis radius of the ellipse.<br />
-         A negative value is an error (see <a
-        href="implnote.html#ErrorProcessing">Error processing</a>).
-        A value of zero disables rendering of the element.<br />
-         <span class="anim-target"><a
-        href="animate.html#Animatable">Animatable</a>:
-        yes.</span></dd>
-      </dl>
-    </div>
+<p><em>Attribute definitions:</em></p>
+
+<dl class="attrdef-list">
+  <dt>
+    <table class="propdef attrdef">
+      <tr>
+        <th>Name</th>
+        <th>Value</th>
+        <th>Lacuna value</th>
+        <th>Animatable</th>
+      </tr>
+      <tr>
+        <td><dfn id="EllipseElementCXAttribute">cx</dfn>, <dfn id="EllipseElementCYAttribute">cy</dfn></td>
+        <td><a>&lt;length&gt;</a></td>
+        <td>0</td>
+        <td>yes</td>
+      </tr>
+    </table>
+  </dt>
+  <dd>
+    The coordinates of the center of the ellipse.
+  </dd>
+  <dt>
+    <table class="propdef attrdef">
+      <tr>
+        <th>Name</th>
+        <th>Value</th>
+        <th>Lacuna value</th>
+        <th>Animatable</th>
+      </tr>
+      <tr>
+        <td><dfn id="EllipseElementRXAttribute">rx</dfn>, <dfn id="EllipseElementRYAttribute">ry</dfn></td>
+        <td><a>&lt;length&gt;</a></td>
+        <td>0</td>
+        <td>yes</td>
+      </tr>
+    </table>
+  </dt>
+  <dd>
+    The x- and y-axis radii of the ellipse.  A negative value for
+    either attribute is an error (see
+    <a href="implnote.html#ErrorProcessing">Error processing</a>).
+    A value of zero disables rendering of the element.
+  </dd>
+</dl>
 
 <p id="ExampleEllipse01">The arc of an <a>'ellipse'</a> element begins
 at the "3 o'clock" point on the radius and progresses towards the "9
@@ -444,47 +424,48 @@
 
 <edit:elementsummary name='line'/>
 
-    <div class="adef-list">
-      <p><em>Attribute definitions:</em></p>
-      <dl>
-        <dt id="LineElementX1Attribute"><span
-        class="adef">x1</span> = "<span class="attr-value"><a
-        href="types.html#DataTypeLength">&lt;length&gt;</a></span>"</dt>
-        <dd>The x-axis coordinate of the start of the line.<br />
-         If the attribute is not specified, the effect is as if a
-        value of "0" were specified.<br />
-         <span class="anim-target"><a
-        href="animate.html#Animatable">Animatable</a>:
-        yes.</span></dd>
-        <dt id="LineElementY1Attribute"><span
-        class="adef">y1</span> = "<span class="attr-value"><a
-        href="types.html#DataTypeLength">&lt;length&gt;</a></span>"</dt>
-        <dd>The y-axis coordinate of the start of the line.<br />
-         If the attribute is not specified, the effect is as if a
-        value of "0" were specified.<br />
-         <span class="anim-target"><a
-        href="animate.html#Animatable">Animatable</a>:
-        yes.</span></dd>
-        <dt id="LineElementX2Attribute"><span
-        class="adef">x2</span> = "<span class="attr-value"><a
-        href="types.html#DataTypeLength">&lt;length&gt;</a></span>"</dt>
-        <dd>The x-axis coordinate of the end of the line.<br />
-         If the attribute is not specified, the effect is as if a
-        value of "0" were specified.<br />
-         <span class="anim-target"><a
-        href="animate.html#Animatable">Animatable</a>:
-        yes.</span></dd>
-        <dt id="LineElementY2Attribute"><span
-        class="adef">y2</span> = "<span class="attr-value"><a
-        href="types.html#DataTypeLength">&lt;length&gt;</a></span>"</dt>
-        <dd>The y-axis coordinate of the end of the line.<br />
-         If the attribute is not specified, the effect is as if a
-        value of "0" were specified.<br />
-         <span class="anim-target"><a
-        href="animate.html#Animatable">Animatable</a>:
-        yes.</span></dd>
-      </dl>
-    </div>
+<p><em>Attribute definitions:</em></p>
+
+<dl class="attrdef-list">
+  <dt>
+    <table class="propdef attrdef">
+      <tr>
+        <th>Name</th>
+        <th>Value</th>
+        <th>Lacuna value</th>
+        <th>Animatable</th>
+      </tr>
+      <tr>
+        <td><dfn id="LineElementX1Attribute">x1</dfn>, <dfn id="EllipseElementY1Attribute">y1</dfn></td>
+        <td><a>&lt;length&gt;</a></td>
+        <td>0</td>
+        <td>yes</td>
+      </tr>
+    </table>
+  </dt>
+  <dd>
+    The x- and y-axis coordinates of the start of the line.
+  </dd>
+  <dt>
+    <table class="propdef attrdef">
+      <tr>
+        <th>Name</th>
+        <th>Value</th>
+        <th>Lacuna value</th>
+        <th>Animatable</th>
+      </tr>
+      <tr>
+        <td><dfn id="LineElementX2Attribute">x2</dfn>, <dfn id="EllipseElementY2Attribute">y2</dfn></td>
+        <td><a>&lt;length&gt;</a></td>
+        <td>0</td>
+        <td>yes</td>
+      </tr>
+    </table>
+  </dt>
+  <dd>
+    The x- and y-axis coordinates of the end of the line.
+  </dd>
+</dl>
 
 <p>Mathematically, a <a>'line'</a> element can be mapped to an
 equivalent <a>'path'</a> element as follows: (Note: all coordinate and
@@ -526,23 +507,33 @@
 
 <edit:elementsummary name='polyline'/>
 
-    <div class="adef-list">
-      <p><em>Attribute definitions:</em></p>
-      <dl>
-        <dt id="PolylineElementPointsAttribute"><span
-        class="adef">points</span> = "<span class="attr-value"><a
-        href="shapes.html#PointsBNF">&lt;list-of-points&gt;</a></span>"</dt>
-        <dd>The points that make up the polyline. All coordinate
-        values are in the user coordinate system.<br />
-         <span class="anim-target"><a
-        href="animate.html#Animatable">Animatable</a>:
-        yes.</span></dd>
-      </dl>
-    </div>
+<p><em>Attribute definitions:</em></p>
 
-<p>If an odd number of coordinates is provided, then the element is in
-error, with the same user agent behavior as occurs with an incorrectly
-specified <a>'path'</a> element.</p>
+<dl class="attrdef-list">
+  <dt>
+    <table class="propdef attrdef">
+      <tr>
+        <th>Name</th>
+        <th>Value</th>
+        <th>Lacuna value</th>
+        <th>Animatable</th>
+      </tr>
+      <tr>
+        <td><dfn id="PolylineElementPointsAttribute">points</dfn></td>
+        <td><a href="shapes.html#PointsBNF">&lt;list-of-points&gt;</a></td>
+        <td>(none)</td>
+        <td>yes</td>
+      </tr>
+    </table>
+  </dt>
+  <dd>
+    <p>The points that make up the polyline. All coordinate
+    values are in the user coordinate system.</p>
+    <p>If an odd number of coordinates is provided, then the element is in
+    error, with the same user agent behavior as occurs with an incorrectly
+    specified <a>'path'</a> element.</p>
+  </dd>
+</dl>
 
 <p>Mathematically, a <a>'polyline'</a> element can be mapped to an
 equivalent <a>'path'</a> element as follows:</p>
@@ -573,23 +564,33 @@
 
 <edit:elementsummary name='polygon'/>
 
-    <div class="adef-list">
-      <p><em>Attribute definitions:</em></p>
-      <dl>
-        <dt id="PolygonElementPointsAttribute"><span
-        class="adef">points</span> = "<span class="attr-value"><a
-        href="shapes.html#PointsBNF">&lt;list-of-points&gt;</a></span>"</dt>
-        <dd>The points that make up the polygon. All coordinate
-        values are in the user coordinate system.<br />
-         <span class="anim-target"><a
-        href="animate.html#Animatable">Animatable</a>:
-        yes.</span></dd>
-      </dl>
-    </div>
+<p><em>Attribute definitions:</em></p>
 
-<p>If an odd number of coordinates is provided, then the element is in
-error, with the same user agent behavior as occurs with an incorrectly
-specified <a>'path'</a> element.</p>
+<dl class="attrdef-list">
+  <dt>
+    <table class="propdef attrdef">
+      <tr>
+        <th>Name</th>
+        <th>Value</th>
+        <th>Lacuna value</th>
+        <th>Animatable</th>
+      </tr>
+      <tr>
+        <td><dfn id="PolygonElementPointsAttribute">points</dfn></td>
+        <td><a href="shapes.html#PointsBNF">&lt;list-of-points&gt;</a></td>
+        <td>(none)</td>
+        <td>yes</td>
+      </tr>
+    </table>
+  </dt>
+  <dd>
+    <p>The points that make up the polygon. All coordinate
+    values are in the user coordinate system.</p>
+    <p>If an odd number of coordinates is provided, then the element is in
+    error, with the same user agent behavior as occurs with an incorrectly
+    specified <a>'path'</a> element.</p>
+  </dd>
+</dl>
 
 <p>Mathematically, a <a>'polygon'</a> element can be mapped to an
 equivalent <a>'path'</a> element as follows:</p>