<?xml version="1.0"?>
 <!-- Comment -->
  <!ATTLIST Toolbar
    name CDATA #REQUIRED
    background CDATA "&white;"
    visible (true | false) #IMPLIED
  >
  %includeOther;
  <!ATTLIST Item 
    name CDATA #FIXED "unnamed&amp;unknown"
  >
  <!ATTLIST OherItem
    %sharedAttributes;
  >
error
