--- a/master/masking.html	Tue Jul 31 15:59:28 2012 +0900
+++ b/master/masking.html	Tue Jul 31 16:18:20 2012 +0900
@@ -982,17 +982,17 @@
       <li>Create a new <a>'mask element'</a> element as a sibling of the
           paint server element.</li>
       <li>Let the <a>'maskUnits'</a> attribute be <span
-          class="attr-value">userSpaceOnUse</span>.</li>
+          class="attr-value">'userSpaceOnUse'</span>.</li>
       <li>Let the dimensions of the mask 
           (<a>'x'</a>, <a>'y'</a>, <a>'width'</a>, and <a>'height'</a>)
           match the dimensions of the decorated bounding box of the mask
           target.</li>
       <li>Let the <a>'maskContentUnits'</a> attribute be <span
-          class="attr-value">objectBoundingBox</span>.</li>
+          class="attr-value">'objectBoundingBox'</span>.</li>
       <li>Create a new <a>'rect'</a> element as a child of the newly
           created <a>'mask element'</a> element.</li>
       <li>Let both the width and the height of the <a>'rect'</a> element be
-          <span class="attr-value">100%</span>.</li>
+          <span class="attr-value">'100%'</span>.</li>
       <li>Let the <a>'fill'</a> property of the <a>'rect'</a> element
           refer to the paint server element.</li>
       <li>Use the newly created <a>'mask element'</a> as the mask source.</li>
@@ -1010,7 +1010,7 @@
       <li>Create a new <a>'mask element'</a> element as a sibling of the
           source element.</li>
       <li>Let the <a>'maskUnits'</a> attribute be <span
-          class="attr-value">userSpaceOnUse</span>.</li>
+          class="attr-value">'userSpaceOnUse'</span>.</li>
       <li>Let the dimensions of the mask 
           (<a>'x'</a>, <a>'y'</a>, <a>'width'</a>, and <a>'height'</a>)
           match the dimensions of the decorated bounding box of the mask