<!ELEMENT portlet-types (portlet-type*)>
<!ELEMENT portlet-type (name,definition,description,state,editable,extensions?)>
<!ELEMENT name         (#PCDATA)>
<!ELEMENT definition   (#PCDATA)>
<!ELEMENT description  (#PCDATA)>
<!ELEMENT state		     (#PCDATA)>
<!ELEMENT editable	   (#PCDATA)>
<!ELEMENT extensions (extension+)>
<!ELEMENT extension (#PCDATA)>
<!ATTLIST extension key CDATA #REQUIRED>