Model "degree of contribution" as described in the FAQ?

[marijane]

From @marijane on December 9, 2016 9:3

Per the CRediT FAQ:
"When there are multiple people serving in the same role a ‘degree of contribution’ should be further specified as either ‘lead’, ‘equal’, or ‘supporting’. "

Should we include this concept in the ontology? How might we model it?

Copied from original issue: data2health/contributor-role-ontology#5

[mellybelly]

Lets use a small secondary root of qualifiers for this purpose. These can then be used in an annotation or to create post composed classes.

For example:
Contribution extent
--lead
--equal
--supporting

Though I don't love the last one, when would you ever use it? TBD but can implement above if you like.