Definition 4.3 (pq-Gram) For p > 0 and q > 0, a pq-gram of a tree T is defined as a subtree of the extended tree Tpq that is isomorphic to the pq-gram pattern.
Definition 4.3 (pq-Gram) For p > 0 and q > 0, a pq-gram of a tree T is defined as a subtree of the extended tree Tpq that is isomorphic to the pq-gram pattern.
the PQGram to retrieve all subtrees of
all subtrees of the PQGram