diff --git a/xep-0393.xml b/xep-0393.xml
index 051fb38c..1db8e336 100644
--- a/xep-0393.xml
+++ b/xep-0393.xml
@@ -164,12 +164,12 @@
     <di>
       <dt>Span</dt>
       <dd>
-        A group of text that is rendered inline and where the entire group is
-        rendered in the same manner.
+        A group of text that may be rendered inline alongside other spans.
         Spans may be either plain text with no formatting applied, or may be
         formatted text that is enclosed by two styling directives.
         Spans are always children of blocks and may not escape from their
         containing block.
+        Some spans may contain child spans.
         The following all contain spans marked by parenthesis:
         <ul>
           <li>(plain span)</li>
@@ -428,4 +428,7 @@
 <section1 topic='XML Schema' anchor='schema'>
   <p>This document does not define any new XML structure requiring a schema.</p>
 </section1>
+<section1 topic='Acknowledgements' anchor='ack'>
+  <p>The author wishes to thank Kevin Smith for his review and feedback.</p>
+</section1>
 </xep>