Improved Double-Layer Structure Multilabel Classification Model via Optimal Sequence and Attention Mechanism

Algorithm 2

	Constructing the minimum spanning tree of labels based on Algorithm 1:
	Input: G (V, E)
	Output: MWT
(1)	MWT  {}
(2)	For   G, then V is:
(3)	Make the set ()
(4)	For (u, ) in G. E is ordered according to weight (u, ) via an increasing way:
(5)	If set(u)  set():
(6)	MST = MST  {(u, )}
(7)	Let it Union (u, )
(8)	Return MWT  MST