<?xml encoding="US-ASCII"?>

<!ELEMENT main (#PCDATA | nothing | preserve | preserve2)* >

<!ELEMENT preserve (#PCDATA | nothing | space-default)* >
<!ATTLIST preserve xml:space (default|preserve) 'preserve'>

<!ELEMENT preserve2 (#PCDATA | nothing | space-default)* >
<!ATTLIST preserve2 xml:space NMTOKEN #FIXED "preserve">

<!ELEMENT space-default (#PCDATA| nothing | preserve)*>
<!ATTLIST space-default xml:space (default|preserve) 'default'>

<!ELEMENT nothing (#PCDATA) >