It is correct that only a single OntoUML stereotype must be used in a decoratable element (classes, relationships, etc.). However, it is not a problem to have one OntoUML stereotype plus other non-OntoUML stereotypes (e.g., domain stereotypes).
The ontouml-schema allows the addition of multiple stereotypes as it defines its stereotypes field as A non-empty array of non-empty strings representing stereotypes of its container object. Nullable..
It is correct that only a single OntoUML stereotype must be used in a decoratable element (classes, relationships, etc.). However, it is not a problem to have one OntoUML stereotype plus other non-OntoUML stereotypes (e.g., domain stereotypes).
The ontouml-schema allows the addition of multiple stereotypes as it defines its
stereotypes
field asA non-empty array of non-empty strings representing stereotypes of its container object. Nullable.
.