⳨(abc) means 'a permutation of THE SET OF OBJECTS IN BRACKETS'. So, 4312 = ⳨(1234) means 4312 is a permutation of 1234 ie. 4312 is a rearrangement of the associated (by being identically the same) parts of 1234.
Whether or not a ⳨ relationship between two sets is meaningful - in the sense that it has been deliberately engineered - is something that is often up for debate and is an important quality in Qu. Every object in Qu has a set of qualities. For a relationship, the quality Meaningful is either true or false. QualityMeaningful(Relationship r) = True implies the involvement of an ID. Whether this is a human or non-human designer is another follow on quality of (potentially) great importance.