Union types are used when a Query or Field can return a union of different data types. In the Sanctuary Health API this notably is used from Post to the relevant media, represented as a MediaUnion and from Course to the relevant standalone content, represented as a CourseItemContentUnion.
Access union data
The syntax for accessing union type data is the same as to the syntax for fragments, just apply a fragment for the attributes you want for each union type.
For the case of union types you can also specify these fragments inline by skipping the
fragment keyword and the fragment name.