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<! $Id: classes-format.5,v 1.2 2003/05/10 17:58:10 stolcke Exp $><HTML><HEADER><TITLE>classes-format</TITLE><BODY><H1>classes-format</H1><H2> NAME </H2>classes-format - File format for word class definitions<H2> SYNOPSIS </H2><I>class</I> [<I>p</I>] <I>word1</I> <I>word2</I> ...<H2> DESCRIPTION </H2>Various programs dealing with word classes use this format to definethe posssible expansions of classes and their respective probabilities.Each expansion appears on a separate line as in the synopsis, where<I> class </I>names a word class,<I> p </I>gives the probability for the class expansion, and<I> word1 word2 ... </I>defines the word string that the class expands to.If <I> p </I>is omitted it is assumed to be 1.(All expansion probabilities for a given class should sum to one,although this is not necessarily enforced by the software and wouldlead to improper models.)<P>Note that the concept of word class here is generalized to include``multi-words'', or phrases consisting of more than one word.All expansions must have at least one word.Certain models might impose more restrictive formats.<H2> SEE ALSO </H2><A HREF="ngram.html">ngram(1)</A>, <A HREF="ngram-class.html">ngram-class(1)</A>, <A HREF="disambig.html">disambig(1)</A>, <A HREF="training-scripts.html">training-scripts(1)</A>, <A HREF="pfsg-scripts.html">pfsg-scripts(5)</A>.<H2> AUTHOR </H2>Andreas Stolcke <stolcke@speech.sri.com>.<BR>Copyright 1999 SRI International</BODY></HTML>?? 快捷鍵說(shuō)明
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