Categorial Grammars with Iterated Types form a Strict Hierarchy of k-Valued Languages [chapter]

Denis Béchet, Alexandre Dikovsky, Annie Foret
<span title="">2011</span> <i title="Springer Berlin Heidelberg"> <a target="_blank" rel="noopener" href="" style="color: black;">Lecture Notes in Computer Science</a> </i> &nbsp;
The notion of k-valued categorial grammars in which every word is associated to at most k types is often used in the field of lexicalized grammars as a fruitful constraint for obtaining interesting properties like the existence of learning algorithms. This constraint is reasonable only when the classes of kvalued grammars correspond to a real hierarchy of generated languages. Such a hierarchy has been established earlier for the classical categorial grammars. In this paper the hierarchy by the
more &raquo; ... -valued constraint is established in the class of categorial grammars extended with iterated types adapted to express the so called projective dependency structures.
<span class="external-identifiers"> <a target="_blank" rel="external noopener noreferrer" href="">doi:10.1007/978-3-642-22256-6_5</a> <a target="_blank" rel="external noopener" href="">fatcat:ubwaqz34ubfnjjeegxc6b65aby</a> </span>
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