<!ATTLIST string xml:space (default|preserve) 'preserve'>
<!ELEMENT matrix (double,double,double,double)>
<!ELEMENT bool (#PCDATA)>
-<!ELEMENT charset (#PCDATA)>
-<!ATTLIST charset xml:space (default|preserve) 'preserve'>
+<!ELEMENT charset (int|range)*>
+<!ELEMENT range (int,int)>
<!ELEMENT name (#PCDATA)>
<!ATTLIST name xml:space (default|preserve) 'preserve'>
<!ELEMENT const (#PCDATA)>