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+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>Chapter 9. Other commands</title><link rel="stylesheet" type="text/css" href="docbook.css" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="home" href="index.html" title="Matita V0.99.5 User Manual (rev. 0.99.5 )" /><link rel="up" href="index.html" title="Matita V0.99.5 User Manual (rev. 0.99.5 )" /><link rel="prev" href="tac_bydone.html" title="done" /><link rel="next" href="command_check.html" title="check" /></head><body><a xmlns="" href="../../../"><div class="matita_logo"><img src="figures/matita.png" alt="Tiny Matita logo" /><span>Matita Home</span></div></a><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter 9. Other commands</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="tac_bydone.html">Prev</a> </td><th width="60%" align="center"> </th><td width="20%" align="right"> <a accesskey="n" href="command_check.html">Next</a></td></tr></table><hr /></div><div class="chapter"><div class="titlepage"><div><div><h1 class="title"><a id="sec_commands"></a>Chapter 9. Other commands</h1></div></div></div><div class="toc"><p><strong>Table of Contents</strong></p><dl class="toc"><dt><span class="sect1"><a href="sec_commands.html#command_alias">alias</a></span></dt><dt><span class="sect1"><a href="command_check.html">check</a></span></dt><dt><span class="sect1"><a href="command_coercion.html">coercion</a></span></dt><dt><span class="sect1"><a href="command_include.html">include</a></span></dt><dt><span class="sect1"><a href="command_include_alias.html">include alias</a></span></dt><dt><span class="sect1"><a href="command_qed.html">qed</a></span></dt><dt><span class="sect1"><a href="command_qed_minus.html">qed-</a></span></dt><dt><span class="sect1"><a href="command_unification_hint.html">unification hint</a></span></dt><dt><span class="sect1"><a href="command_universe_constraints.html">universe constraint</a></span></dt></dl></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a id="command_alias"></a>alias</h2></div></div></div><p><strong class="userinput"><code>alias id "s" = "def"</code></strong></p><p><strong class="userinput"><code>alias symbol "s" (instance n) = "def"</code></strong></p><p><strong class="userinput"><code>alias num (instance n) = "def"</code></strong></p><p>
+ </p><div class="variablelist"><dl class="variablelist"><dt><span class="term">Synopsis:</span></dt><dd><p><span class="bold"><strong>alias</strong></span>
+ [<span class="bold"><strong>id</strong></span> <span class="emphasis"><em><a class="link" href="sec_terms.html#grammar.qstring">qstring</a></em></span> <span class="bold"><strong>=</strong></span> <span class="emphasis"><em><a class="link" href="sec_terms.html#grammar.qstring">qstring</a></em></span>
+ | <span class="bold"><strong>symbol</strong></span> <span class="emphasis"><em><a class="link" href="sec_terms.html#grammar.qstring">qstring</a></em></span> [<span class="bold"><strong>(instance</strong></span> <span class="emphasis"><em><a class="link" href="sec_terms.html#grammar.nat">nat</a></em></span><span class="bold"><strong>)</strong></span>] <span class="bold"><strong>=</strong></span> <span class="emphasis"><em><a class="link" href="sec_terms.html#grammar.qstring">qstring</a></em></span>
+ | <span class="bold"><strong>num</strong></span> [<span class="bold"><strong>(instance</strong></span> <span class="emphasis"><em><a class="link" href="sec_terms.html#grammar.nat">nat</a></em></span><span class="bold"><strong>)</strong></span>] <span class="bold"><strong>=</strong></span> <span class="emphasis"><em><a class="link" href="sec_terms.html#grammar.qstring">qstring</a></em></span>
+ ]
+ </p></dd><dt><span class="term">Action:</span></dt><dd><p>Used to give an hint to the disambiguating parser.
+ When the parser is faced to the identifier (or symbol)
+ <span class="command"><strong>s</strong></span> or to any number, it will prefer
+ interpretations that "map <span class="command"><strong>s</strong></span> (or the
+ number) to <span class="command"><strong>def</strong></span>". For identifiers,
+ "def" is the URI of the interpretation.
+ E.g.: <span class="command"><strong>cic:/matita/nat/nat.ind#xpointer(1/1/1)</strong></span>
+ for the first constructor of the first inductive type defined
+ in the block of inductive type(s)
+ <span class="command"><strong>cic:/matita/nat/nat.ind</strong></span>.
+ For symbols and numbers, "def" is the label used to
+ mark the wanted
+ <a class="link" href="ch05s02.html#interpretation">interpretation</a>.
+ </p><p>When a symbol or a number occurs several times in the
+ term to be parsed, it is possible to give an hint only for the
+ instance <span class="command"><strong>n</strong></span>. When the instance is omitted,
+ the hint is valid for every occurrence.
+ </p><p>
+ Hints are automatically inserted in the script by Matita every
+ time the user is interactively asked a question to disambiguate
+ a term. This way the user won't be posed the same question twice
+ when the script will be executed again.</p></dd></dl></div><p>
+ </p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="tac_bydone.html">Prev</a> </td><td width="20%" align="center"> </td><td width="40%" align="right"> <a accesskey="n" href="command_check.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">done </td><td width="20%" align="center"><a accesskey="h" href="index.html">Home</a></td><td width="40%" align="right" valign="top"> check</td></tr></table></div></body></html>
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