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| author | Karl Berry <karl@freefriends.org> | 2005-12-29 00:31:48 +0000 |
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| committer | Karl Berry <karl@freefriends.org> | 2005-12-29 00:31:48 +0000 |
| commit | a9d59a2d83b345581f2eb0c6b7f08c091f5622f0 (patch) | |
| tree | 00fba7fbf3f00c16be8699398c6e4c2a256c68ac /Master/texmf-doc/doc/english/FAQ-en/html/FAQ-atsigns.html | |
| parent | 89caab08d62b22519b44acf582a5fc3d302cbd60 (diff) | |
doc/english/F-ca
git-svn-id: svn://tug.org/texlive/trunk@19 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/texmf-doc/doc/english/FAQ-en/html/FAQ-atsigns.html')
| -rw-r--r-- | Master/texmf-doc/doc/english/FAQ-en/html/FAQ-atsigns.html | 44 |
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diff --git a/Master/texmf-doc/doc/english/FAQ-en/html/FAQ-atsigns.html b/Master/texmf-doc/doc/english/FAQ-en/html/FAQ-atsigns.html new file mode 100644 index 00000000000..732a14f49ea --- /dev/null +++ b/Master/texmf-doc/doc/english/FAQ-en/html/FAQ-atsigns.html @@ -0,0 +1,44 @@ +<head> +<title>UK TeX FAQ -- question label atsigns</title> +</head><body> +<h3><code>\</code><code>@</code> and <code>@</code> in macro names</h3> +<p>Macro names containing <code>@</code> are <em>internal</em> to LaTeX, and +without special treatment just don't work in ordinary use. An +exemplar of the problems caused is discussed in +"<a href="FAQ-atvert.html"><code>\</code><code>@</code> in vertical mode</a>". +<p>The problems users see are caused by copying bits of a class (<code>.cls</code> file) or +package (<code>.sty</code> file) into a document, or by including a class or +package file into a LaTeX document by some means other than +<code>\</code><code>documentclass</code> or <code>\</code><code>usepackage</code>. LaTeX defines internal +commands whose names contain the character <code>@</code> to +avoid clashes between its internal names and names that we would +normally use in our documents. In order that these commands may work +at all, <code>\</code><code>documentclass</code> and <code>\</code><code>usepackage</code> play around with the +meaning of <code>@</code>. +<p>If you've included a file wrongly, you solve the problem by using the +correct command. +<p>If you're using a fragment of a package or class, you may well feel +confused: books such as <a href="FAQ-books.html"><em>The LaTeX Companion</em></a> +are full of fragments of packages as examples for you to employ. +<p>For example, there's a lengthy section in <em>The Companion</em> about +<code>\</code><code>@startsection</code> and how to use it to control the appearance of +section titles. Page 15 discusses the problem; and +suggests that you make such changes in the document preamble, between +<code>\</code><code>makeatletter</code> and <code>\</code><code>makeatother</code>. So the redefinition of +<code>\</code><code>subsection</code> on page 26 could be: +<blockquote> +<pre> +\makeatletter +\renewcommand{\subsection}{\@startsection + {subsection}% % name + ... + {\normalfont\normalsize\itshape}}% style +\makeatother +</pre> +</blockquote> +<p>The alternative is to treat all these fragments as a package proper, +bundling them up into a <code>.sty</code> file and including them with +<code>\</code><code>usepackage</code>. (This approach is marginally preferable, from the +LaTeX purist's point of view.) +<p><p>This question on the Web: <a href="http://www.tex.ac.uk/cgi-bin/texfaq2html?label=atsigns">http://www.tex.ac.uk/cgi-bin/texfaq2html?label=atsigns</a> +</body> |