More text about creating new names for slots with '::slot()'.

Author: bert-github

css3-layout/new.src.html

@@ -1191,6 +1191,11 @@ <h2 id=positioning>
 		grammar</abbr>
   </table>
 
+<p>All content positioned into the same slot, whether positioned by
+name ('position: a'), by coordinates ('position: 2 3') or implicitly
+by flowing into the default slot, forms a single flow, with content in
+document order.
+
 <div class=issue>
 <p>css3-grid-align allows to define a position either by saying how
 many rows/columns it spans, or by saying  at which row and column
@@ -1270,7 +1275,8 @@ <h2 id=slot-pseudo>The ''::slot()'' pseudo-element</h2>
 </div>
 
 <p class=issue>The ''::slot()'' pseudo-element can also be used to
-create slots that overlap with other slots.
+create slots that overlap with other slots and to create alternative
+(alias) names for slots.
 
 <div class="example issue">
 <p>For example, the following creates a slot that overlaps two other
@@ -1285,6 +1291,15 @@ <h2 id=slot-pseudo>The ''::slot()'' pseudo-element</h2>
 </pre>
 </div>
 
+<p>If a '::slot()' pseudo-element refers to a name that already exists
+in the element's grid element, than any 'position' property on that
+pseudo-element is ignored.
+
+<p>If a '::slot()' pseudo-element defines a new slot that coincides
+exactly with another slot in the element's grid element, then it is in
+fact the same slot, and the new name is an alias for that
+slot. <span class=issue>Unless it has a different 'z-index'?</span>
+
 <p>The selector ''<var>E</var>::slot(<var>X</var>)'' selects the part
 of an element <var>E</var> that falls inside the slot with name
 <var>X</var> of a template <var>T</var>, where <var>T</var> is either