Bounded repairability for regular tree languages

We consider the problem of repairing unranked trees (e.g., XML documents) satisfying a given restriction specification R (e.g., a DTD) into unranked trees satisfying a given target specification T. Specifically, we focus on the question of whether one can get from any tree in a regular language R to some tree in another regular language T with a finite, uniformly bounded, number of edit operations (i.e., deletions and insertions of nodes). We give effective characterizations of the pairs of specifications R and T for which such a uniform bound exists, and we study the complexity of the problem under different representations of the regular tree languages (e.g., non-deterministic stepwise automata, deterministic stepwise automata, DTDs). Finally, we point out some connections with the analogous problem for regular languages of words, which was previously studied in [6]. Categories and Subject Descriptors H.2.m [Information Systems]: Database Management— Repair Keywords XML, ed...

• Type: Journal
• Year: 2012
• Where: ICDT
• Authors: Gabriele Puppis, Cristian Riveros, Slawek Staworko
• Keywords: Database, ICDT 2012, Subject Descriptors, Target, Tree Languages