<!ELEMENT dia:diagram (dia:diagramdata, (dia:layer)*) >
<!ATTLIST dia:diagram
   xmlns:dia CDATA #FIXED "http://www.lysator.liu.se/~alla/dia/">

<!ELEMENT dia:diagramdata (dia:attribute)* >

<!ELEMENT dia:layer (dia:object | dia:group)*>
<!ATTLIST dia:layer
   name CDATA #REQUIRED
   visible (true|false) #REQUIRED 
   active (true|false) #IMPLIED>

<!ELEMENT dia:object ((dia:attribute)*, dia:connections?)>
<!ATTLIST dia:object
   type CDATA #REQUIRED
   version NMTOKEN #REQUIRED
   id ID #REQUIRED >

<!ELEMENT dia:connections (dia:connection)*>

<!ELEMENT dia:connection EMPTY>
<!ATTLIST dia:connection
   handle NMTOKEN #REQUIRED
   to IDREF #REQUIRED
   connection NMTOKEN #REQUIRED>

<!ELEMENT dia:group (dia:object | dia:group)*>

<!ELEMENT dia:attribute (dia:composite | dia:int | dia:enum | dia:real |
		    dia:boolean | dia:color | dia:point | dia:rectangle | 
		    dia:string | dia:font)*>
<!ATTLIST dia:attribute  name CDATA #REQUIRED >

<!ELEMENT dia:composite (dia:attribute|dia:composite)*>
<!ATTLIST dia:composite  type CDATA #IMPLIED>

<!ELEMENT  dia:int EMPTY>
<!ATTLIST  dia:int  val NMTOKEN #REQUIRED>

<!ELEMENT  dia:enum EMPTY>
<!ATTLIST  dia:enum  val NMTOKEN #REQUIRED>

<!ELEMENT  dia:real EMPTY>
<!ATTLIST  dia:real  val CDATA #REQUIRED>

<!ELEMENT  dia:boolean EMPTY>
<!ATTLIST  dia:boolean  val (true|false) #REQUIRED>

<!ELEMENT  dia:color EMPTY>
<!ATTLIST dia:color  val CDATA #REQUIRED>

<!ELEMENT dia:point EMPTY>
<!ATTLIST dia:point  val CDATA #REQUIRED>

<!ELEMENT dia:rectangle EMPTY>
<!ATTLIST dia:rectangle  val CDATA #REQUIRED>

<!ELEMENT dia:string (#PCDATA)>

<!ELEMENT dia:font EMPTY>
<!ATTLIST dia:font 
  name CDATA #REQUIRED
  style CDATA #IMPLIED
  family CDATA #IMPLIED>