part_of's multiple definitions in Change Discovery 1.0?

[azaroth42]

In Change Discovery 1.0 we use part_of on the Ordered Collection to allow the stream to list the registries or other streams-of-streams that this stream is part of, and thus needs to be an array. However, in Ordered Collection Page, we use part_of to refer to the stream that the page is part of, which can only be in one, and is thus just the json object.

So independently these are correct ... but holistically should both be arrays to keep the definition the same? Given this would be a breaking change, it would have to be in 2.0.