<!ELEMENT configuration (length, start, indent, changes+) >
<!ELEMENT length (#PCDATA) >
<!ELEMENT start (#PCDATA) >
<!ELEMENT indent (#PCDATA) >
<!ELEMENT changes (title, length,
bugfix, feature, change, workaround,
(month, month, month, month, month, month,
month, month, month, month, month, month)?) >
<!ATTLIST changes lang ( ru | en) #REQUIRED>
<!ELEMENT title (#PCDATA) >
<!ELEMENT bugfix (#PCDATA) >
<!ELEMENT feature (#PCDATA) >
<!ELEMENT change (#PCDATA) >
<!ELEMENT workaround (#PCDATA) >
<!ELEMENT month (#PCDATA) >