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degree-contribution Degree of Contribution

Answers the question: “Was this contributor a lead, a supporting player, or were all contributions equal?”
OPTIONAL on element: <role>
Value Meaning
Text, numbers, or special characters What level of role did this contributor play, such as “Supporting”.
Restriction @degree-contribution is an optional attribute; there is no default.

Suggested usage

Although the Tag Set does not enforce any values, to preserve what a publisher or other source has established, suggested values for this attribute, based on the CRediT role attributes, include:
lead
One of the leading contributors.
Supporting
One of the supporting contributors.
equal
Equal contribution by all contributors.
Tagged Sample

Identifying two contributors’ level of participation

...
<contrib-group>
 <contrib>
  <string-name><given-names>Barbara</given-names> <surname>Johnston</surname></string-name>
  <role vocab="CRediT" 
    vocab-identifier="https://casrai.org/credit"
    vocab-term="Conceptualization"
    degree-contribution="lead">study designer</role>
 </contrib>
 <contrib>
  <string-name><given-names>Brooke</given-names> <surname>Jackson</surname></string-name>
  <role vocab="CRediT" 
    vocab-identifier="https://casrai.org/credit"
    vocab-term="Writing &#8212; original draft"
    degree-contribution="lead">writer</role>
 </contrib>
</contrib-group>
...