Model

<!ENTITY % contrib-model
                        "(%contrib-id.class; | %name.class; |  
                          %degree.class; | %contrib-info.class; |  
                          %x.class;)* "                              >

Expanded Model

(contrib-id | anonymous | collab | collab-alternatives | name | name-alternatives | string-name | degrees | address | aff | aff-alternatives | author-comment | bio | email | etal | ext-link | fn | on-behalf-of | role | uri | xref | x)*