Pivotal Entry-based Method index:0123456 ● Extend node(n11n2) Top3-Query: Esrajit 0∷(n11n2) 0 (S15] 2t6 11 Substitution: (n2 2 n3) a1,1](e22 Insertion:24t(n32n)r““r2r 13 Deletion: ff,(n2 3 n3) a 3,3](t4,4]a 18 25 10 19 26 D:1 D:2|D3D:4 D:5 D:6 2/2/2021 Topk Search(@ ICD E2013Pivotal Entry-based Method  Extend Node (n1 1 n2 ) Top3-Query: ε s r a j i t P0 : … (n1 1 n2 ) … P1 : ... 2/2/2021 TopkSearch @ ICDE2013 37/42 index: 0 1 2 3 4 5 6 Substitution: (n2 2 n3 ) Insertion: (n2 1 n3 ) (n3 2 n4 ) Deletion: (n1 2 n2 ) (n2 3 n3 ) …