Optimal Probabilistic Generation of XML Documents

Serge Abiteboul, Yael Amsterdamer, Daniel Deutch*, Tova Milo, P. Senellart

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We study the problem of, given a corpus of XML documents and its schema, finding an optimal (generative) probabilistic model, where optimality here means maximizing the likelihood of the particular corpus to be generated. Focusing first on the structure of documents, we present an efficient algorithm for finding the best generative probabilistic model, in the absence of constraints. We further study the problem in the presence of integrity constraints, namely key, inclusion, and domain constraints. We study in this case two different kinds of generators. First, we consider a continuation-test generator that performs, while generating documents, tests of schema satisfiability; these tests prevent from generating a document violating the constraints but, as we will see, they are computationally expensive. We also study a restart generator that may generate an invalid document and, when this is the case, restarts and tries again. Finally, we consider the injection of data values into the structure, to obtain a full XML document. We study different approaches for generating these values.

Original languageEnglish
Pages (from-to)806-842
Number of pages37
JournalTheory of Computing Systems
Volume57
Issue number4
DOIs
StatePublished - 1 Nov 2015

Funding

FundersFunder number
Advanced European Research Council291071, 226513
European Research Council
Israel Ministry of Science
United States-Israel Binational Science Foundation
United States-Israel Binational Science Foundation

    Keywords

    • Constraints
    • Generator
    • Probabilistic model
    • Schema
    • XML

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