Variants of top-down tree transducers with look-ahead

The Equivalence of Bottom-Up and Top-Dow

The Equivalence of Bottom-Up and Top-Down Tree-to-Graph Transducers

✍ Joost Engelfriet; Heiko Vogler 📂 Article 📅 1998 🏛 Elsevier Science 🌐 English ⚖ 979 KB

We introduce the bottom-up tree-to-graph transducer, which is very similar to the usual (total deterministic) bottom-up tree transducer except that it translates trees into hypergraphs rather than trees, using hypergraph substitution instead of tree substitution. If every output hypergraph of the tr