diff --git a/xep-0166.xml b/xep-0166.xml
index 2297177b..854c137b 100644
--- a/xep-0166.xml
+++ b/xep-0166.xml
@@ -1597,7 +1597,7 @@ PENDING  o----------------------+   |
     <xs:sequence>
       <xs:element name='sid'
                   minOccurs='0'
-                  maxOcccurs='1'
+                  maxOccurs='1'
                   type='xs:NMTOKEN'/>
     </xs:sequence>
   </xs:complexType>
@@ -1607,11 +1607,11 @@ PENDING  o----------------------+   |
       <xs:any namespace='##other' minOccurs='0' maxOccurs='unbounded'/>
     </xs:sequence>
     <xs:attribute name='creator'
-                  use='required'
+                  use='optional'
                   default='initiator'>
       <xs:simpleType>
         <xs:restriction base='xs:NCName'>
-          <xs:enumeration value='initiator'>
+          <xs:enumeration value='initiator'/>
           <xs:enumeration value='responder'/>
         </xs:restriction>
       </xs:simpleType>
@@ -1628,9 +1628,9 @@ PENDING  o----------------------+   |
                   default='both'>
       <xs:simpleType>
         <xs:restriction base='xs:NCName'>
-          <xs:enumeration value='both'>
-          <xs:enumeration value='initiator'>
-          <xs:enumeration value='none'>
+          <xs:enumeration value='both'/>
+          <xs:enumeration value='initiator'/>
+          <xs:enumeration value='none'/>
           <xs:enumeration value='responder'/>
         </xs:restriction>
       </xs:simpleType>