The DTD for the XML format

<!-- Root element -->
<!ELEMENT GenieGate (GroupDefinitions?,
					PropertyDefinitions?,
					Users?)>
					
<!ELEMENT GroupDefinitions (GroupDefinition*)>
<!ELEMENT GroupDefinition EMPTY>
<!ATTLIST GroupDefinition gid NMTOKEN #REQUIRED>
<!ATTLIST GroupDefinition name CDATA #IMPLIED>
<!-- Flag not used -->
<!ATTLIST GroupDefinition signup (Y|N) #IMPLIED>

<!ELEMENT PropertyDefinitions (PropertySection*)>
<!ELEMENT PropertySection (PropertyDefinition*)>
<!ATTLIST PropertySection id	NMTOKEN #REQUIRED>
<!ATTLIST PropertySection title CDATA #IMPLIED>

<!ELEMENT PropertyDefinition EMPTY >
<!ATTLIST PropertyDefinition property	NMTOKEN #REQUIRED>
<!ATTLIST PropertyDefinition title CDATA #IMPLIED>

<!-- Container for Users, this should be in another file.  -->
<!ELEMENT Users (User*) >

<!-- Container for a user. -->
<!ELEMENT User (Groups?,UserProperties*)>
<!ATTLIST User uid 	NMTOKEN #REQUIRED>
<!ATTLIST User email CDATA #REQUIRED>
<!ATTLIST User password CDATA #REQUIRED>
<!-- YYYY-MM-DD -->
<!ATTLIST User created NMTOKEN #IMPLIED>
<!ATTLIST User confirm (Y|U) #REQUIRED>
<!ATTLIST User name CDATA #IMPLIED>


<!-- Groups user is a member of. -->
<!ELEMENT Groups (Group*)>
<!ELEMENT Group EMPTY>
<!ATTLIST Group gid NMTOKEN #REQUIRED>

<!-- Properties grouped by a section. -->
<!ELEMENT UserProperties (UserProperty*)>
<!ATTLIST UserProperties section NMTOKEN #REQUIRED>

<!-- Only element that actually uses #PCDATA. (Since a property could
	 in theory contain multiple lines) -->
<!ELEMENT UserProperty (#PCDATA)>
<!ATTLIST UserProperty property NMTOKEN #REQUIRED>