As described in https://cloud.google.com/apis/design/design_patterns#get_uni...:
//calendar.googleapis.com/users/-/events/123 //calendar.googleapis.com/users/-/events/123But it doesn't cover the case I'm referring to; in their example you MUST return the fully-qualified URL:
> shelves/shelf713/books/book8141, not shelves/-/books/book8141
This precludes there being multiple shelves with the same book (sensible in their example, since a book has only one shelf, but not in the example above).