Added an idea for duplicating elements.

Author: bert-github

css3-layout/Overview.src.html

@@ -2038,6 +2038,34 @@ <h3 id=flow>Flowing content into slots: 'flow'</h3>
 is ''max-content' and an element in the slot has 'height: 110%', there
 is a conflict&hellip;
 
+<div class=issue>
+<p>Allowing multiple values on 'flow' could be an easy way to
+duplicate elements. E.g., this style
+
+<pre>
+BODY {grid: "a.b.c."}
+H1 {flow: a, b, c}
+#art1 {flow: a}
+#art2 {flow: b}
+#art3 {flow: c}
+</pre>
+
+<p>with a document like
+
+<pre>
+...
+&lt;H1>Local news&lt;/H1>
+&lt;DIV ID=art1>...&lt;/DIV>
+&lt;DIV ID=art2>...&lt;/DIV>
+&lt;DIV ID=art3>...&lt;/DIV>
+</pre>
+
+<p>would repeat the H1 at the top of all three
+columns. With <a href="#region-based" >region-based styling,</a> the
+three instances could even be styled differently, e.g., with generated
+content: 'H1::flow(b)::before {content: "cont'd "}'
+</div>
+
 <!--=================================================================-->
 
 <h3>Absolute positioning using a grid: 'grid-position-x' and
@@ -3647,7 +3675,8 @@ <h4>Style the slots (pseudo-elements)</h4>
 
 <!--=================================================================-->
 
-<h4>Style the contents of slots (region-based styling)</h4>
+<h4 id=region-based>Style the contents of slots (region-based
+styling)</h4>
 
 <p>By means of a new pseudo-element, style could be applied to only
 the part of an element that is inside a certain slot (similar to how