|  |  | 
|  | <!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) > |