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Node Query Preservation for Deterministic Linear Top-Down Tree Transducers
2013
Electronic Proceedings in Theoretical Computer Science
This paper discusses the decidability of node query preservation problems for XML document transformations. We assume a transformation given by a deterministic linear top-down data tree transducer (abbreviated as DLT^V) and an n-ary query based on runs of a tree automaton. We say that a DLT^V Tr strongly preserves a query Q if there is a query Q' such that for every document t, the answer set of Q' for Tr(t) is equal to the answer set of Q for t. Also we say that Tr weakly preserves Q if there
doi:10.4204/eptcs.134.4
fatcat:rljnbnajljaiblaqoulbizqk64