A fundamental characteristic of knowledge is the degree to which it is shared. If I decide this character"}" means the quantity 5 and no one else is aware of that, my } is absolutely worthless/devoid of meaning. If however I have cooperatively agreed with the members of a project team that WE've decided to use } in the quantity of 5 capacity for some actionable reason, then } becomes meaningful information; knowledge (for us).

IMHO, all knowledge is by definition "co-created," as the act of acquiring the information into one's own personally held construct of meaning is an act of creation for them. Their creative act is by it's similarity then, "shared" with whomever else has also created the same/similar meaning for themselves, even if it was done 1000 years earlier. This is the essence of what "knowledge" truly IS!