Is 'choice' and 'group' in UNO possible?

[Stephan Bergmann]

On 4/5/23 18:47, Regina Henschel wrote:
> In RELAX NG (used for ODF file format) the structure below is possible. 
> Is something similar possible for to define an "enhanced-color" for API? 
> I mean, to have two members, where the data type of the second depends 
> on the value of the first.

UNO does not support sum types.  So you'd need to resort to something 
more ugly, like a struct type with a discriminating member (e.g. an 
enum) plus two further members (of which one or the other would be 
ignored) or (probably more idiomatic) an ANY.