REST api versioning (only version the representation, not the resource itself)

Question

I had a look at Best practices for API versioning?, but am not quite convinced of the answer, so I am question the versioning part again with a more specific example. I am h

Answer 1

Another approach could be to say that "one representation has multiple APIs":

http://xxx/user/123/api/1.json

And if you wish, you could return the representation using the latest API when requesting like this:

http://xxx/user/123.json

Personally I like other solutions better but this is another approach that I haven't seen suggested here yet.