Change marker-pattern grammar to disallow consecutive lengths/percent…

…ages.

master/definitions.xml

@@ -1202,7 +1202,9 @@
   <symbol name='list' href='types.html#DataTypeList'/>
   <symbol name='list-of-family-names' href='types.html#DataTypeListOfFamilyNames'/>
   <symbol name='list-of-strings' href='types.html#DataTypeListOfStrings'/>
+  <symbol name='marker-gap' href="painting.html#DataTypeMarkerGap"/>
   <symbol name='marker-ref' href='painting.html#DataTypeMarkerRef'/>
+  <symbol name='marker-ref-group' href="painting.html#DataTypeMarkerRefGroup"/>
   <symbol name="name" href="types.html#DataTypeName"/>
   <symbol name='number' href='http://www.w3.org/TR/css3-values/#numbers'/>
   <symbol name='number-optional-number' href='types.html#DataTypeNumberOptionalNumber'/>

master/painting.html

@@ -4457,7 +4457,7 @@ <h3 id="RepeatingMarkers">Repeating markers: the <span class="property">'marker-
   </tr>
   <tr>
     <th>Value:</th>
-    <td>[ none | <a>&lt;length&gt;</a> | <a>&lt;percentage&gt;</a> | <a>&lt;marker-ref&gt;</a> ]+</td>
+    <td><a>&lt;marker-gap&gt;</a>? <a>&lt;marker-ref-group&gt;</a> [ <a>&lt;marker-gap&gt;</a> <a>&lt;marker-ref-group&gt;</a> ]* <a>&lt;marker-gap&gt;</a>?</td>
   </tr>
   <tr>
     <th>Initial:</th>
@@ -4490,6 +4490,18 @@ <h3 id="RepeatingMarkers">Repeating markers: the <span class="property">'marker-
   </tr>
 </table>
 
+<p>where:</p>
+
+<div class="definition">
+  <dfn id="DataTypeMarkerGap">&lt;marker-gap&gt;</dfn> =
+  <div style="margin-left: 4em"><a>&lt;length&gt;</a> | <a>&lt;percentage&gt;</a></div>
+</div>
+
+<div class="definition">
+  <dfn id="DataTypeMarkerRefGroup">&lt;marker-ref-group&gt;</dfn> =
+  <div style="margin-left: 4em">none | <a>&lt;marker-ref&gt;</a>+</div>
+</div>
+
 <p class="note">New in SVG 2.  Added to allow markers to be placed along a path
 at positions unrelated to the segments used to form the path.</p>
 
@@ -4502,16 +4514,14 @@ <h3 id="RepeatingMarkers">Repeating markers: the <span class="property">'marker-
   <dd>Indicates that no marker will be painted at the current
   position along the path.</dd>
 
-  <dt><span class="prop-value"><a>&lt;length&gt;</a></span></dt>
-  <dt><span class="prop-value"><a>&lt;percentage&gt;</a></span></dt>
+  <dt><span class="prop-value"><a>&lt;marker-gap&gt;</a></span></dt>
   <dd>Indicates the length of a gap in the repeated
   pattern of markers.</dd>
 
   <dt><span class="prop-value"><a>&lt;marker-ref&gt;</a></span></dt>
-  <dd>A reference to a <a>'marker element'</a> that will be
-  placed at the current position along the path.
-  If the reference is not valid, then no marker will be drawn at the
-  current position.</dd>
+  <dd>A reference to a <a>'marker element'</a> that will be placed at the
+  current position along the path.  If the reference is not valid, then no
+  marker for that <a>&lt;marker-ref&gt;</a> will be painted.</dd>
 </dl>
 
 <p>If a value other than <span class="prop-value">none</span> is given,