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<HTML><HEAD><TITLE>HOL/Lex/README</TITLE></HEAD>
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<H1>A Simplified Scanner Generator</H1>
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This directory contains the theories for the functional scanner generator
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described
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<A HREF="http://www4.informatik.tu-muenchen.de/~nipkow/pubs/tphols98.html">
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here</A>.
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<br>
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Overview:
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<dl>
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<dt>Automata</dt>
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<dd>AutoProj, NA, NAe, DA, Automata</dd>
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<dt>Regular expressions and their conversion to automata</dt>
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<dd>RegSet, RegExp, RegExp2NAe</dd>
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<dt>Scanning</dt>
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<dd>Prefix, MaxPrefix, MaxChop, AutoMaxChop, Scanner</dd>
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</dl>
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In addition there are some bits and pieces:
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<ul>
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<li> Regset_of_nat_DA describes the translation of deterministic automata
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into regular sets. Should be completed to translate finite automata
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into regular expressions.
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<li> Chopper, AutoChopper and AutoChopper1 are old versions of the scanner
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(excluding regular expressions). Mainly of historic interest.
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</ul>
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