The title or role of a contributor (such as an author) to a work, for example, “Editor-in-Chief”, “Contributor”, “Chief Scientist”, “Photographer”, “Research Associate”, etc.
Information on the role or type of contribution is collected in two places: in the contrib-type attribute on the <contrib> element, and in the <role> element (which is part of the contributor information inside a <contrib> element). For example, the <contrib> element’s contrib-type attribute might have a value of “editor”, whereas the content of the <role> element could be “Associate Editor”. As another example, the <contrib> element’s contrib-type attribute might be “author”, and the <role> element might contain “Principal Author”.
<!ELEMENT role (#PCDATA %role-elements;)* >
Any combination of:
...<contrib-group> <contrib contrib-type="author" rid="StLukes"> <name><surname>Johnson</surname> <given-names>John Jacob</given-names> </name> <role>research physiotherapist</role> </contrib> <contrib contrib-type="author" rid="RoyalInf"> <name><surname>Smithson</surname> <given-names>Sally B.</given-names></name> <role>consultant physician</role> <author-comment><p>in addition to her role as consulting physician on this project, Dr. Smithson owns trains the therapy dog used in the experiments</p></author-comment> </contrib> </contrib-group>...