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@@ -48,15 +48,13 @@
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         <optional>
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           <element name="dateCreated">
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             <a:documentation xml:lang="en">A date-time, indicating when the document was created.</a:documentation>
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-<!--            <data type="dateTime" /> -->
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-			<data type="string" />
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+            <ref name="rfc_822_opml_rx" />
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           </element>
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         </optional>
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         <optional>
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           <element name="dateModified">
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             <a:documentation xml:lang="en">A date-time, indicating when the document was last modified.</a:documentation>
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-			<!--            <data type="dateTime" /> -->
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-			<data type="string" />
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+            <ref name="rfc_822_opml_rx" />
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           </element>
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         </optional>
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         <optional>
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@@ -158,8 +156,7 @@
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     <optional>
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       <attribute name="created">
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         <a:documentation xml:lang="en">The date and time that the outline node was created. Follows RFC 822 (eg. "Sat, 09 Apr 2007 14:57:36 GMT").</a:documentation>
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-		<!--            <data type="dateTime" /> -->
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-		<data type="string" />
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+        <ref name="rfc_822_opml_rx" />
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       </attribute>
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     </optional>
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   </define>
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@@ -278,13 +275,13 @@
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       <optional>
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         <attribute name="whenFirstPlayed">
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           <a:documentation xml:lang="en">The time/date the song was played for the first time.</a:documentation>
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-          <data type="dateTime" />
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+          <ref name="rfc_822_opml_rx" />
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         </attribute>
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       </optional>
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     <optional>
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       <attribute name="whenLastPlayed">
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         <a:documentation xml:lang="en">The time/date that the song was played most recently.</a:documentation>
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-        <data type="dateTime" />
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+        <ref name="rfc_822_opml_rx" />
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       </attribute>
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     </optional>
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     <optional>
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@@ -298,4 +295,9 @@
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       <param name="pattern">[\-+]?(\d+|\d+(\.\d+)?%)(,\s?(\d+|\d+(\.\d+)?%))*</param>
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     </data>
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   </define>
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+  <define name="rfc_822_opml_rx">
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+    <data type="string">
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+      <param name="pattern">^((Mon|Tue|Wed|Thur|Fri|Sat|Sun), )?(\d+) (Jan|Feb|Mar|Apr|May|Jun|Jul|Aug|Sep|Oct|Nov|Dec) (\d{2,4}) (\d{2}):(\d{2})(:(\d{2})?) (\S{1,4}|(\+|\-)\d{4})$</param>
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+    </data>
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+  </define>
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 </grammar>