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<H1>nondeterministic tree automaton</H1>
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(definition)
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<strong>Definition:</strong>
A <a href="nondtrmnstfa.html" tppabs="http://hissa.nist.gov/dads/HTML/nondtrmnstfa.html"><em>nondeterministic finite automaton</em></a> that accepts infinite <a href="tree.html" tppabs="http://hissa.nist.gov/dads/HTML/tree.html"><em>trees</em></a> rather than just <a href="string.html" tppabs="http://hissa.nist.gov/dads/HTML/string.html"><em>strings</em></a>. The tree <a href="node.html" tppabs="http://hissa.nist.gov/dads/HTML/node.html"><em>nodes</em></a> are marked with the letters of the <a href="alphabet.html" tppabs="http://hissa.nist.gov/dads/HTML/alphabet.html"><em>alphabet</em></a> of the automaton, and the transition function encodes the <a href="nextstate.html" tppabs="http://hissa.nist.gov/dads/HTML/nextstate.html"><em>next states</em></a> for each branch of the tree. The expressive power of such automata varies depending on the acceptance conditions of the trees.
<P><strong>See also</strong>
<a href="nondtrmnstcf.html" tppabs="http://hissa.nist.gov/dads/HTML/nondtrmnstcf.html"><em>nondeterministic finite tree automaton</em></a>.
<P>Author: <a href="terms.html#authorSKS" tppabs="http://hissa.nist.gov/dads/terms.html#authorSKS">SKS</a>
<H2>More information</H2>
<A HREF="javascript:if(confirm('http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.grappa.univ-lille3.fr/tata/ \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address. \n\nDo you want to open it from the server?'))window.location='http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.grappa.univ-lille3.fr/tata/'" tppabs="http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.grappa.univ-lille3.fr/tata/">Tree Automata Techniques and Applications</A> page.
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Entry modified Sat Sep 4 16:10:11 1999.<BR>
HTML page formatted Wed Dec 22 09:35:57 1999.
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