minor reformulation

Author: danielweck

css3-speech/Overview.html

@@ -2186,9 +2186,9 @@ <h3 id=voice-props-voice-pitch><span class=secno>10.3. </span>The &lsquo;<a
    <dt> <strong>absolute</strong>
 
    <dd>
-    <p> This keyword specifies that the provided frequency represents an
-     absolute value. If a negative frequency is specified, the computed
-     frequency will be zero.</p>
+    <p> If specified, this keyword indicates that the specified frequency
+     represents an absolute value. If a negative frequency is specified, the
+     computed frequency will be zero.</p>
 
    <dt> <strong>&lt;semitones&gt;</strong>
 
@@ -2327,8 +2327,8 @@ <h3 id=voice-props-voice-range><span class=secno>10.4. </span>The &lsquo;<a
    <dt> <strong>absolute</strong>
 
    <dd>
-    <p> This keyword specifies that the provided frequency is expressed as an
-     absolute, positive value. If a negative frequency is specified, the
+    <p> If specified, this keyword indicates that the specified frequency
+     represents an absolute value. If a negative frequency is specified, the
      computed frequency will be zero.</p>
 
    <dt> <strong>&lt;semitones&gt;</strong>

css3-speech/Overview.src.html

@@ -1733,8 +1733,8 @@ <h3 id="voice-props-voice-pitch">The 'voice-pitch' property</h3>
         <strong>absolute</strong>
       </dt>
       <dd>
-        <p> This keyword specifies that the provided frequency represents an absolute value. If a
-          negative frequency is specified, the computed frequency will be zero. </p>
+        <p> If specified, this keyword indicates that the specified frequency represents an absolute
+          value. If a negative frequency is specified, the computed frequency will be zero. </p>
       </dd>
       <dt>
         <strong>&lt;semitones&gt;</strong>
@@ -1868,7 +1868,7 @@ <h3 id="voice-props-voice-range">The 'voice-range' property</h3>
         <strong>absolute</strong>
       </dt>
       <dd>
-        <p> This keyword specifies that the provided frequency is expressed as an absolute, positive
+        <p> If specified, this keyword indicates that the specified frequency represents an absolute
           value. If a negative frequency is specified, the computed frequency will be zero.</p>
       </dd>
       <dt>