<!ELEMENT o-ex:rights (o-ex:context, o-ex:agreement)>
<!ATTLIST o-ex:rights
	xmlns:o-ex CDATA #FIXED "http://odrl.net/1.1/ODRL-EX"
	xmlns:o-dd CDATA #FIXED "http://odrl.net/1.1/ODRL-DD"
	xmlns:ds CDATA #FIXED "http://www.w3.org/2000/09/xmldsig#/"
>
<!ELEMENT o-ex:context (o-dd:version?, o-dd:uid?)>
<!ELEMENT o-dd:version (#PCDATA)>
<!ELEMENT o-dd:uid (#PCDATA)>
<!ELEMENT o-ex:agreement (o-ex:asset, o-ex:permission)>
<!ELEMENT o-ex:asset (o-ex:context, ds:KeyInfo?)>
<!ELEMENT ds:KeyInfo (ds:KeyValue)>
<!ELEMENT ds:KeyValue (#PCDATA)>
<!ELEMENT o-ex:permission (o-dd:play?, o-dd:display?, o-dd:execute?, o-dd:print?)>
<!ELEMENT o-dd:play (o-ex:constraint?)>
<!ELEMENT o-dd:display (o-ex:constraint?)>
<!ELEMENT o-dd:execute (o-ex:constraint?)>
<!ELEMENT o-dd:print (o-ex:constraint?)>
<!ELEMENT o-ex:constraint (o-dd:count?, o-dd:datetime?, o-dd:interval?)>
<!ELEMENT o-dd:count (#PCDATA)>
<!ELEMENT o-dd:datetime (o-dd:start?, o-dd:end?)>
<!ELEMENT o-dd:start (#PCDATA)>
<!ELEMENT o-dd:end (#PCDATA)>
<!ELEMENT o-dd:interval (#PCDATA)>