Template:DTD 0.5/Relations

<!ELEMENT relation ((tag|member)*)>
<!ATTLIST relation id        CDATA #REQUIRED>
<!ATTLIST relation visible   CDATA #IMPLIED>
<!ATTLIST relation user      CDATA #IMPLIED>
<!ATTLIST relation timestamp CDATA #IMPLIED>

<!ELEMENT member EMPTY>
<!ATTLIST member type (way|node|relation) #REQUIRED>
<!ATTLIST member ref  CDATA  #REQUIRED>
<!ATTLIST member role CDATA  #IMPLIED>