Top-down tree transducers with regular look-ahead
نویسندگان
چکیده
منابع مشابه
Look-Ahead Removal for Top-Down Tree Transducers
Top-down tree transducers are a convenient formalism for describing tree transformations. They can be equipped with regular look-ahead, which allows them to inspect a subtree before processing it. In certain cases, such a look-ahead can be avoided and the transformation can be realized by a transducer without look-ahead. Removing the look-ahead from a transducer, if possible, is technically hig...
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We study the problem of how to learn tree transformations on a given regular tree domain from a finite sample of input-output examples. We assume that the target tree transformation can be defined by a deterministic top-down tree transducer with regular domain inspection (DTopIreg). An rpni style learning algorithm that solves this problem in polynomial time and with polynomially many examples ...
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For a top-down tree transducer with regular look-ahead we introduce the notion of difference bound, which is a number bounding the difference in output height for any two look-ahead states of the transducer. We present an algorithm that, for a given transducer with a known difference bound, decides whether it is equivalent to a transducer without regular look-ahead, and constructs such a transd...
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A composition procedure for linear and nondeleting extended top-down tree transducers is presented. It is demonstrated that the new procedure is more widely applicable than the existing methods. In general, the result of the composition is an extended top-down tree transducer that is no longer linear or nondeleting, but in a number of cases these properties can easily be recovered by a post-pro...
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ژورنال
عنوان ژورنال: DAIMI Report Series
سال: 1975
ISSN: 2245-9316,0105-8517
DOI: 10.7146/dpb.v4i49.6468