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|
<html>
<head>
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<title>Phrase Level Elements</title>
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</div>
<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="quickbook.syntax.phrase"></a>Phrase Level Elements</h2></div></div></div>
<div class="toc"><dl>
<dt><span class="section"><a href="phrase.html#quickbook.syntax.phrase.font_styles">Font Styles</a></span></dt>
<dt><span class="section"><a href="phrase.html#quickbook.syntax.phrase.replaceable">Replaceable</a></span></dt>
<dt><span class="section"><a href="phrase.html#quickbook.syntax.phrase.quotations">Quotations</a></span></dt>
<dt><span class="section"><a href="phrase.html#quickbook.syntax.phrase.simple_formatting">Simple formatting</a></span></dt>
<dt><span class="section"><a href="phrase.html#quickbook.syntax.phrase.inline_code">Inline code</a></span></dt>
<dt><span class="section"><a href="phrase.html#quickbook.syntax.phrase.code_blocks">Code blocks</a></span></dt>
<dt><span class="section"><a href="phrase.html#quickbook.syntax.phrase.source_mode">Source Mode</a></span></dt>
<dt><span class="section"><a href="phrase.html#quickbook.syntax.phrase.line_break">line-break</a></span></dt>
<dt><span class="section"><a href="phrase.html#quickbook.syntax.phrase.anchors">Anchors</a></span></dt>
<dt><span class="section"><a href="phrase.html#quickbook.syntax.phrase.links">Links</a></span></dt>
<dt><span class="section"><a href="phrase.html#quickbook.syntax.phrase.anchor_links">Anchor links</a></span></dt>
<dt><span class="section"><a href="phrase.html#quickbook.syntax.phrase.refentry_links">refentry links</a></span></dt>
<dt><span class="section"><a href="phrase.html#quickbook.syntax.phrase.code_links">Code Links</a></span></dt>
<dt><span class="section"><a href="phrase.html#quickbook.syntax.phrase.escape">Escape</a></span></dt>
<dt><span class="section"><a href="phrase.html#quickbook.syntax.phrase.single_char_escape">Single char
escape</a></span></dt>
<dt><span class="section"><a href="phrase.html#quickbook.syntax.phrase.unicode_escape">Unicode escape</a></span></dt>
<dt><span class="section"><a href="phrase.html#quickbook.syntax.phrase.images">Images</a></span></dt>
<dt><span class="section"><a href="phrase.html#quickbook.syntax.phrase.footnotes">Footnotes</a></span></dt>
<dt><span class="section"><a href="phrase.html#quickbook.syntax.phrase.macro_expansion">Macro Expansion</a></span></dt>
<dt><span class="section"><a href="phrase.html#quickbook.syntax.phrase.template_expansion">Template
Expansion</a></span></dt>
<dt><span class="section"><a href="phrase.html#quickbook.syntax.phrase.cond">Conditional Generation</a></span></dt>
</dl></div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="quickbook.syntax.phrase.font_styles"></a><a class="link" href="phrase.html#quickbook.syntax.phrase.font_styles" title="Font Styles">Font Styles</a>
</h3></div></div></div>
<pre class="programlisting">['italic], [*bold], [_underline], [^teletype], [-strikethrough]
</pre>
<p>
will generate:
</p>
<p>
<span class="emphasis"><em>italic</em></span>, <span class="bold"><strong>bold</strong></span>, <span class="underline">underline</span>, <code class="literal">teletype</code>, <span class="strikethrough">strikethrough</span>
</p>
<p>
Like all non-terminal phrase level elements, this can of course be nested:
</p>
<pre class="programlisting">[*['bold-italic]]
</pre>
<p>
will generate:
</p>
<p>
<span class="bold"><strong><span class="emphasis"><em>bold-italic</em></span></strong></span>
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="quickbook.syntax.phrase.replaceable"></a><a class="link" href="phrase.html#quickbook.syntax.phrase.replaceable" title="Replaceable">Replaceable</a>
</h3></div></div></div>
<p>
When you want content that may or must be replaced by the user, use the syntax:
</p>
<pre class="programlisting">[~replacement]
</pre>
<p>
This will generate:
</p>
<p>
<em class="replaceable"><code>replacement</code></em>
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="quickbook.syntax.phrase.quotations"></a><a class="link" href="phrase.html#quickbook.syntax.phrase.quotations" title="Quotations">Quotations</a>
</h3></div></div></div>
<pre class="programlisting">["A question that sometimes drives me hazy: am I or are the others crazy?]--Einstein
</pre>
<p>
will generate:
</p>
<p>
<span class="quote">“<span class="quote">A question that sometimes drives me hazy: am I or are the others crazy?</span>”</span>--Einstein
</p>
<p>
Note the proper left and right quote marks. Also, while you can simply use
ordinary quote marks like "quoted", our quotation, above, will
generate correct DocBook quotations (e.g. <quote>quoted</quote>).
</p>
<p>
Like all phrase elements, quotations may be nested. Example:
</p>
<pre class="programlisting">["Here's the rule for bargains: ["Do other men, for they would do you.] That's
the true business precept.]
</pre>
<p>
will generate:
</p>
<p>
<span class="quote">“<span class="quote">Here's the rule for bargains: <span class="quote">‘<span class="quote">Do other men, for they would
do you.</span>’</span> That's the true business precept.</span>”</span>
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="quickbook.syntax.phrase.simple_formatting"></a><a class="link" href="phrase.html#quickbook.syntax.phrase.simple_formatting" title="Simple formatting">Simple formatting</a>
</h3></div></div></div>
<p>
Simple markup for formatting text, common in many applications, is now supported:
</p>
<pre class="programlisting">/italic/, *bold*, _underline_, =teletype=
</pre>
<p>
will generate:
</p>
<p>
<span class="emphasis"><em>italic</em></span>, <span class="bold"><strong>bold</strong></span>, <span class="underline">underline</span>, <code class="literal">teletype</code>
</p>
<p>
Unlike QuickBook's standard formatting scheme, the rules for simpler alternatives
are much stricter<sup>[<a name="quickbook.syntax.phrase.simple_formatting.f0" href="#ftn.quickbook.syntax.phrase.simple_formatting.f0" class="footnote">8</a>]</sup>.
</p>
<div class="itemizedlist"><ul class="itemizedlist" type="disc">
<li class="listitem">
Simple markups cannot nest. You can combine a simple markup with a nestable
markup.
</li>
<li class="listitem">
Simple markups cannot contain any other form of quickbook markup.
</li>
<li class="listitem">
A non-space character must follow the leading markup
</li>
<li class="listitem">
A non-space character must precede the trailing markup
</li>
<li class="listitem">
A space or a punctuation must follow the trailing markup
</li>
<li class="listitem">
If the matching markup cannot be found within a block, the formatting
will not be applied. This is to ensure that un-matched formatting markups,
which can be a common mistake, does not corrupt anything past a single
block. We do not want the rest of the document to be rendered bold just
because we forgot a trailing '*'. A single block is terminated by two
end of lines or the close bracket: ']'.
</li>
<li class="listitem">
A line starting with the star will be interpreted as an unordered list.
See <a class="link" href="block.html#quickbook.syntax.block.lists.unordered_lists" title="Unordered lists">Unordered
lists</a>.
</li>
</ul></div>
<div class="table">
<a name="quickbook.syntax.phrase.simple_formatting.more_formatting_samples"></a><p class="title"><b>Table 37.1. More Formatting Samples</b></p>
<div class="table-contents"><table class="table" summary="More Formatting Samples">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
Markup
</p>
</th>
<th>
<p>
Result
</p>
</th>
</tr></thead>
<tbody>
<tr>
<td>
<p>
<code class="computeroutput">*Bold*</code>
</p>
</td>
<td>
<p>
<span class="bold"><strong>Bold</strong></span>
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput">*Is bold*</code>
</p>
</td>
<td>
<p>
<span class="bold"><strong>Is bold</strong></span>
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput">* Not bold* *Not bold * * Not bold *</code>
</p>
</td>
<td>
<p>
* Not bold* *Not bold * * Not bold *
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput">This*Isn't*Bold (no bold)</code>
</p>
</td>
<td>
<p>
This*Isn't*Bold (no bold)
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput">(*Bold Inside*) (parenthesis not bold)</code>
</p>
</td>
<td>
<p>
(<span class="bold"><strong>Bold Inside</strong></span>) (parenthesis not
bold)
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput">*(Bold Outside)* (parenthesis bold)</code>
</p>
</td>
<td>
<p>
<span class="bold"><strong>(Bold Outside)</strong></span> (parenthesis bold)
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput">3*4*5 = 60 (no bold)</code>
</p>
</td>
<td>
<p>
3*4*5 = 60 (no bold)
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput">3 * 4 * 5 = 60 (no bold)</code>
</p>
</td>
<td>
<p>
3 * 4 * 5 = 60 (no bold)
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput">3 *4* 5 = 60 (4 is bold)</code>
</p>
</td>
<td>
<p>
3 <span class="bold"><strong>4</strong></span> 5 = 60 (4 is bold)
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput">*This is bold* this is not *but this is*</code>
</p>
</td>
<td>
<p>
<span class="bold"><strong>This is bold</strong></span> this is not <span class="bold"><strong>but this is</strong></span>
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput">*This is bold*.</code>
</p>
</td>
<td>
<p>
<span class="bold"><strong>This is bold</strong></span>.
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput">*B*. (bold B)</code>
</p>
</td>
<td>
<p>
<span class="bold"><strong>B</strong></span>. (bold B)
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput">['*Bold-Italic*]</code>
</p>
</td>
<td>
<p>
<span class="emphasis"><em><span class="bold"><strong>Bold-Italic</strong></span></em></span>
</p>
</td>
</tr>
<tr>
<td>
<p>
<code class="computeroutput">*side-by*/-side/</code>
</p>
</td>
<td>
<p>
<span class="bold"><strong>side-by</strong></span><span class="emphasis"><em>-side</em></span>
</p>
</td>
</tr>
</tbody>
</table></div>
</div>
<br class="table-break"><p>
As mentioned, simple markups cannot go past a single block. The text from
"have" to "full" in the following paragraph will be rendered
as bold:
</p>
<pre class="programlisting">Baa baa black sheep, *have you any wool?
Yes sir, yes sir, three bags full!*
One for the master, one for the dame,
And one for the little boy who lives down the lane.
</pre>
<p>
Baa baa black sheep, <span class="bold"><strong>have you any wool? Yes sir, yes
sir, three bags full!</strong></span> One for the master, one for the dame, And
one for the little boy who lives down the lane.
</p>
<p>
But in the following paragraph, bold is not applied:
</p>
<pre class="programlisting">Baa baa black sheep, *have you any wool?
Yes sir, yes sir, three bags full!
One for the master, one for the dame,
And one for the little boy who lives down the lane.
</pre>
<p>
Baa baa black sheep, *have you any wool? Yes sir, yes sir, three bags full!
One for the master, one for the dame, And one for the little boy who lives
down the lane.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="quickbook.syntax.phrase.inline_code"></a><a class="link" href="phrase.html#quickbook.syntax.phrase.inline_code" title="Inline code">Inline code</a>
</h3></div></div></div>
<p>
Inlining code in paragraphs is quite common when writing C++ documentation.
We provide a very simple markup for this. For example, this:
</p>
<pre class="programlisting">This text has inlined code `int main() { return 0; }` in it.
</pre>
<p>
will generate:
</p>
<p>
This text has inlined code <code class="computeroutput">int main() { return 0; }</code> in it. The
code will be syntax highlighted.
</p>
<div class="note"><table border="0" summary="Note">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td>
<th align="left">Note</th>
</tr>
<tr><td align="left" valign="top"><p>
We simply enclose the code with the tick: <code class="literal">"`"</code>,
not the single quote: <code class="computeroutput">"'"</code>. Note too that <code class="literal">`some
code`</code> is preferred over <code class="computeroutput">[^some code]</code>.
</p></td></tr>
</table></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="quickbook.syntax.phrase.code_blocks"></a><a class="link" href="phrase.html#quickbook.syntax.phrase.code_blocks" title="Code blocks">Code blocks</a>
</h3></div></div></div>
<p>
Preformatted code simply starts with a space or a tab (See <a class="link" href="block.html#quickbook.syntax.block.code" title="Code">Code</a>).
However, such a simple syntax cannot be used as phrase elements in lists
(See <a class="link" href="block.html#quickbook.syntax.block.lists.ordered_lists" title="Ordered lists">Ordered lists</a>
and <a class="link" href="block.html#quickbook.syntax.block.lists.unordered_lists" title="Unordered lists">Unordered
lists</a>), tables (See <a class="link" href="block.html#quickbook.syntax.block.tables" title="Tables">Tables</a>),
etc. Inline code (see above) can. The problem is, inline code does not allow
formatting with newlines, spaces, and tabs. These are lost.
</p>
<p>
We provide a phrase level markup that is a mix between the two. By using
the double-tick or triple-tick, instead of the single-tick, we are telling
QuickBook to use preformatted blocks of code. Example:
</p>
<pre class="programlisting">``
#include <iostream>
int main()
{
std::cout << "Hello, World!" << std::endl;
return 0;
}
``
</pre>
<p>
or:
</p>
<pre class="programlisting">```
#include <iostream>
int main()
{
std::cout << "Hello, World!" << std::endl;
return 0;
}
```
</pre>
<p>
will generate:
</p>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">iostream</span><span class="special">></span>
<span class="keyword">int</span> <span class="identifier">main</span><span class="special">()</span>
<span class="special">{</span>
<span class="identifier">std</span><span class="special">::</span><span class="identifier">cout</span> <span class="special"><<</span> <span class="string">"Hello, World!"</span> <span class="special"><<</span> <span class="identifier">std</span><span class="special">::</span><span class="identifier">endl</span><span class="special">;</span>
<span class="keyword">return</span> <span class="number">0</span><span class="special">;</span>
<span class="special">}</span>
</pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="quickbook.syntax.phrase.source_mode"></a><a class="link" href="phrase.html#quickbook.syntax.phrase.source_mode" title="Source Mode">Source Mode</a>
</h3></div></div></div>
<p>
If a document contains more than one type of source code then the source
mode may be changed dynamically as the document is processed. All QuickBook
documents are initially in C++ mode by default, though an alternative initial
value may be set in the <a class="link" href="structure.html#quickbook.syntax.structure.docinfo" title="Document Info">Document</a>
section.
</p>
<p>
To change the source mode, use the <code class="literal">[source-mode]</code> markup,
where <code class="literal">source-mode</code> is one of the supported modes. For example,
this:
</p>
<pre class="programlisting">Python's [python] `import` is rather like C++'s [c++] `#include`. A
C++ comment `// looks like this` whereas a Python comment [python]
`# looks like this`.
</pre>
<p>
will generate:
</p>
<p>
Python's <code class="computeroutput"><span class="keyword">import</span></code> is rather like
C++'s <code class="computeroutput"><span class="preprocessor">#include</span></code>. A C++ comment
<code class="computeroutput"><span class="comment">// looks like this</span></code> whereas a
Python comment <code class="computeroutput"><span class="comment">#looks like this</span></code>.
</p>
<div class="table">
<a name="quickbook.syntax.phrase.source_mode.supported_source_modes"></a><p class="title"><b>Table 37.2. Supported Source Modes</b></p>
<div class="table-contents"><table class="table" summary="Supported Source Modes">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
Mode
</p>
</th>
<th>
<p>
Source Mode Markup
</p>
</th>
</tr></thead>
<tbody>
<tr>
<td>
<p>
C++
</p>
</td>
<td>
<p>
<code class="literal">[c++]</code>
</p>
</td>
</tr>
<tr>
<td>
<p>
Python
</p>
</td>
<td>
<p>
<code class="literal">[python]</code>
</p>
</td>
</tr>
<tr>
<td>
<p>
Plain Text
</p>
</td>
<td>
<p>
<code class="literal">[teletype]</code>
</p>
</td>
</tr>
</tbody>
</table></div>
</div>
<br class="table-break"><div class="note"><table border="0" summary="Note">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Note]" src="../../../../doc/src/images/note.png"></td>
<th align="left">Note</th>
</tr>
<tr><td align="left" valign="top"><p>
The source mode strings are lowercase.
</p></td></tr>
</table></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="quickbook.syntax.phrase.line_break"></a><a name="ref-line-break"></a><a class="link" href="phrase.html#quickbook.syntax.phrase.line_break" title="line-break">line-break</a>
</h3></div></div></div>
<pre class="programlisting">[br]
</pre>
<div class="warning"><table border="0" summary="Warning">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Warning]" src="../../../../doc/src/images/warning.png"></td>
<th align="left">Warning</th>
</tr>
<tr><td align="left" valign="top"><p>
<code class="computeroutput">[br]</code> generates invalid docbook. It seems to mostly work okay
but there might be problems, especially when using an alternative docbook
processor.
</p></td></tr>
</table></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="quickbook.syntax.phrase.anchors"></a><a class="link" href="phrase.html#quickbook.syntax.phrase.anchors" title="Anchors">Anchors</a>
</h3></div></div></div>
<pre class="programlisting">[#named_anchor]
</pre>
<p>
A named anchor is a hook that can be referenced by a link elsewhere in the
document. You can then reference an anchor with <code class="computeroutput">[link named_anchor
Some link text]</code>. See <a class="link" href="phrase.html#quickbook.syntax.phrase.anchor_links" title="Anchor links">Anchor
links</a>, <a class="link" href="structure.html#quickbook.syntax.structure.section" title="Sections">Section</a>
and <a class="link" href="block.html#quickbook.syntax.block.headings" title="Headings">Heading</a>.
</p>
<p>
These anchors are global and can be accessed from anywhere in the quickbook
documentation. Be careful to avoid clashes with anchors in other sections.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="quickbook.syntax.phrase.links"></a><a class="link" href="phrase.html#quickbook.syntax.phrase.links" title="Links">Links</a>
</h3></div></div></div>
<pre class="programlisting">[@http://www.boost.org this is [*boost's] website....]
</pre>
<p>
will generate:
</p>
<p>
<a href="http://www.boost.org" target="_top">this is <span class="bold"><strong>boost's</strong></span>
website....</a>
</p>
<p>
URL links where the link text is the link itself is common. Example:
</p>
<pre class="programlisting">see http://spirit.sourceforge.net/
</pre>
<p>
so, when the text is absent in a link markup, the URL is assumed. Example:
</p>
<pre class="programlisting">see [@http://spirit.sourceforge.net/]
</pre>
<p>
will generate:
</p>
<p>
see <a href="http://spirit.sourceforge.net/" target="_top">http://spirit.sourceforge.net/</a>
</p>
<p>
Boostbook also support a custom url schema for linking to files within the
boost distribution:
</p>
<pre class="programlisting">[@boost:/libs/spirit/index.html the Boost.Spirit documentation]
</pre>
<p>
will generate: <a href="../../../../libs/spirit/index.html" target="_top">the Boost.Spirit
documentation</a>
</p>
<p>
Note that this is only available when using BoostBook, and only for links
- it can't be used for images.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="quickbook.syntax.phrase.anchor_links"></a><a class="link" href="phrase.html#quickbook.syntax.phrase.anchor_links" title="Anchor links">Anchor links</a>
</h3></div></div></div>
<p>
You can link within a document using:
</p>
<pre class="programlisting">[link document_id.section_id.normalized_header_text The link text]
</pre>
<p>
See sections <a class="link" href="structure.html#quickbook.syntax.structure.section" title="Sections">Section</a>
and <a class="link" href="block.html#quickbook.syntax.block.headings" title="Headings">Heading</a> for more
info.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="quickbook.syntax.phrase.refentry_links"></a><a class="link" href="phrase.html#quickbook.syntax.phrase.refentry_links" title="refentry links">refentry links</a>
</h3></div></div></div>
<p>
In addition, you can link internally to an XML refentry like:
</p>
<pre class="programlisting">[link xml.refentry The link text]
</pre>
<p>
This gets converted into <code class="literal"><link linkend="xml.refentry">The
link text</link></code>.
</p>
<p>
Like URLs, the link text is optional. If this is not present, the link text
will automatically be the refentry. Example:
</p>
<pre class="programlisting">[link xml.refentry]
</pre>
<p>
This gets converted into <code class="literal"><link linkend="xml.refentry">xml.refentry</link></code>.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="quickbook.syntax.phrase.code_links"></a><a class="link" href="phrase.html#quickbook.syntax.phrase.code_links" title="Code Links">Code Links</a>
</h3></div></div></div>
<p>
If you want to link to a function, class, member, enum, concept, global,
or header in the reference section, you can use:
</p>
<pre class="programlisting">[funcref fully::qualified::function_name The link text]
[classref fully::qualified::class_name The link text]
[memberref fully::qualified::member_name The link text]
[enumref fully::qualified::enum_name The link text]
[macroref MACRO_NAME The link text]
[conceptref ConceptName The link text]
[headerref path/to/header.hpp The link text]
[globalref fully::qualified::global The link text]
</pre>
<p>
Again, the link text is optional. If this is not present, the link text will
automatically be the function, class, member, enum, macro, concept, global,
or header name. Example:
</p>
<pre class="programlisting">[classref boost::bar::baz]
</pre>
<p>
would have "boost::bar::baz" as the link text.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="quickbook.syntax.phrase.escape"></a><a class="link" href="phrase.html#quickbook.syntax.phrase.escape" title="Escape">Escape</a>
</h3></div></div></div>
<p>
The escape mark-up is used when we don't want to do any processing.
</p>
<pre class="programlisting">'''
escape (no processing/formatting)
'''
</pre>
<p>
Escaping allows us to pass XML markup to <a href="http://www.boost.org/doc/html/boostbook.html" target="_top">BoostBook</a>
or <a href="http://www.docbook.org/" target="_top">DocBook</a>. For example:
</p>
<pre class="programlisting">'''
<emphasis role="bold">This is direct XML markup</emphasis>
'''
</pre>
<p>
<span class="bold"><strong>This is direct XML markup</strong></span>
</p>
<div class="important"><table border="0" summary="Important">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Important]" src="../../../../doc/src/images/important.png"></td>
<th align="left">Important</th>
</tr>
<tr><td align="left" valign="top"><p>
Be careful when using the escape. The text must conform to <a href="http://www.boost.org/doc/html/boostbook.html" target="_top">BoostBook</a>/<a href="http://www.docbook.org/" target="_top">DocBook</a> syntax.
</p></td></tr>
</table></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="quickbook.syntax.phrase.single_char_escape"></a><a class="link" href="phrase.html#quickbook.syntax.phrase.single_char_escape" title="Single char escape">Single char
escape</a>
</h3></div></div></div>
<p>
The backslash may be used to escape a single punctuation character. The punctuation
immediately after the backslash is passed without any processing. This is
useful when we need to escape QuickBook punctuations such as <code class="computeroutput">[</code>
and <code class="computeroutput">]</code>. For example, how do you escape the triple quote? Simple:
<code class="literal">\'\'\'</code>
</p>
<p>
<code class="computeroutput">\n</code> has a special meaning. It is used to generate line breaks.
</p>
<div class="warning"><table border="0" summary="Warning">
<tr>
<td rowspan="2" align="center" valign="top" width="25"><img alt="[Warning]" src="../../../../doc/src/images/warning.png"></td>
<th align="left">Warning</th>
</tr>
<tr><td align="left" valign="top"><p>
<code class="computeroutput">\n</code> is now deprecated, use <a class="link" href="phrase.html#ref-line-break"><code class="computeroutput">[br]</code></a>
instead. Although, use it sparingly as it can generated invalid docbook
</p></td></tr>
</table></div>
<p>
The escaped space: <code class="computeroutput">\ </code> also has a special meaning. The escaped
space is removed from the output.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="quickbook.syntax.phrase.unicode_escape"></a><a class="link" href="phrase.html#quickbook.syntax.phrase.unicode_escape" title="Unicode escape">Unicode escape</a>
</h3></div></div></div>
<p>
You can enter any 16-bit unicode character by using <code class="computeroutput">\u</code> followed
by its 4 digit hexadecimal code, or a 32-bit character by using <code class="computeroutput">\U</code>
followed by an 8 digit hexadecimal code. eg.
</p>
<pre class="programlisting">\u03B1 + \u03B2
</pre>
<p>
will generate:
</p>
<div class="blockquote"><blockquote class="blockquote"><p>
α + β
</p></blockquote></div>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="quickbook.syntax.phrase.images"></a><a class="link" href="phrase.html#quickbook.syntax.phrase.images" title="Images">Images</a>
</h3></div></div></div>
<pre class="programlisting">[$image.jpg]
</pre>
<p>
From version 1.5, you can also use <a href="http://www.docbook.org/tdg/en/html/imagedata.html" target="_top">DocBook
imagedata attributes</a>:
</p>
<pre class="programlisting">[$image.jpg [width 200in] [height 200in]]
</pre>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="quickbook.syntax.phrase.footnotes"></a><a class="link" href="phrase.html#quickbook.syntax.phrase.footnotes" title="Footnotes">Footnotes</a>
</h3></div></div></div>
<p>
As of version 1.3, QuickBook supports footnotes. Just put the text of the
footnote in a <code class="computeroutput">[footnote]</code> block, and the text will be put at
the bottom of the current page. For example, this:
</p>
<pre class="programlisting">[footnote A sample footnote]
</pre>
<p>
will generate this<sup>[<a name="quickbook.syntax.phrase.footnotes.f0" href="#ftn.quickbook.syntax.phrase.footnotes.f0" class="footnote">9</a>]</sup>.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="quickbook.syntax.phrase.macro_expansion"></a><a class="link" href="phrase.html#quickbook.syntax.phrase.macro_expansion" title="Macro Expansion">Macro Expansion</a>
</h3></div></div></div>
<pre class="programlisting">__a_macro_identifier__
</pre>
<p>
See <a class="link" href="block.html#quickbook.syntax.block.macros" title="Macros">Macros</a> for details.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="quickbook.syntax.phrase.template_expansion"></a><a class="link" href="phrase.html#quickbook.syntax.phrase.template_expansion" title="Template Expansion">Template
Expansion</a>
</h3></div></div></div>
<pre class="programlisting">[a_template_identifier]
</pre>
<p>
See <a class="link" href="block.html#quickbook.syntax.block.templates" title="Templates">Templates</a> for
details.
</p>
</div>
<div class="section">
<div class="titlepage"><div><div><h3 class="title">
<a name="quickbook.syntax.phrase.cond"></a><a class="link" href="phrase.html#quickbook.syntax.phrase.cond" title="Conditional Generation">Conditional Generation</a>
</h3></div></div></div>
<p>
Like C++ <code class="computeroutput">#ifdef</code>, you can generate phrases depending on the presence
of a macro. Example:
</p>
<pre class="programlisting">[? __to_be__ To be or not to be]
</pre>
<p>
Here, the phrase "To be or not to be" will only be generated if
the macro symbol <code class="computeroutput">__to_be__</code> has been previously defined. The
phrase above will not do anything since we haven't defined <code class="computeroutput">__to_be__</code>.
Now, let's define the symbol:
</p>
<pre class="programlisting">[def __to_be__]
</pre>
<p>
And try again:
</p>
<p>
To be or not to be
</p>
<p>
Yes!
</p>
</div>
<div class="footnotes">
<br><hr width="100" align="left">
<div class="footnote"><p><sup>[<a id="ftn.quickbook.syntax.phrase.simple_formatting.f0" href="#quickbook.syntax.phrase.simple_formatting.f0" class="para">8</a>] </sup>
Thanks to David Barrett, author of <a href="http://quinthar.com/qwikiwiki/index.php?page=Home" target="_top">Qwiki</a>,
for sharing these samples and teaching me these obscure formatting rules.
I wasn't sure at all if <a href="http://spirit.sourceforge.net" target="_top">Spirit</a>,
being more or less a formal EBNF parser, can handle the context sensitivity
and ambiguity.
</p></div>
<div class="footnote"><p><sup>[<a id="ftn.quickbook.syntax.phrase.footnotes.f0" href="#quickbook.syntax.phrase.footnotes.f0" class="para">9</a>] </sup>
A sample footnote
</p></div>
</div>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2002, 2004, 2006 Joel de Guzman,
Eric Niebler<br>Copyright © 2010, 2011 Daniel James<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
</p>
</div></td>
</tr></table>
<hr>
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