"stored elsewhere" doesn't make sense to me. Arrays are part of the tuple as much as any other attribute type. You can store anything in an array that you can

"stored elsewhere" doesn't make sense to me. Arrays are part of the tuple as much as any other attribute type. You can store anything in an array that you can store as an attribute of a row. There may be some edge cases I don't know about, but generally anything that can be a column can be an array element.