<!ELEMENT plugin (extension+)>
<!ELEMENT extension (toc*,index?,configExtension*)>
<!ATTLIST extension point NMTOKEN #REQUIRED>
<!ELEMENT toc EMPTY>
<!ATTLIST toc file NMTOKEN #REQUIRED>
<!ATTLIST toc primary NMTOKEN #IMPLIED>
<!ELEMENT index EMPTY>
<!ATTLIST index path NMTOKEN #REQUIRED>
<!ELEMENT configExtension (#PCDATA)>
<!ATTLIST configExtension configId NMTOKEN #REQUIRED>
<!ATTLIST configExtension content CDATA #REQUIRED>