在上一篇xml/xsl(1)，我们知道可以使用XSL来显示XML文档内容。
这被称为数据和显示格式分离，这非常好，当我们想要改变风格，主要换一个XSL就行了，并不需要重新添加一份数据。
但是有的时候也是有特例的，比如我们就有这个奇怪的需求---将XML/XSL写到一个文件。百度后，没有结果；忽然灵机一动，不是有一个很热门的问答网站（stackoverflow）吗！
我就去搜索了一下，果然有个仁兄给出了一个很NICE的答案。我先列出来，后面有时间写个自己修改后的版本。
地址：http://stackoverflow.com/questions/9523174/embed-xsl-in-xml-for-display-in-web-browser-what-am-i-doing-wrong/9530410
<?xml version="1.0" encoding="ISO-8859-1"?>
<?xml-stylesheet type="text/xsl" href="#stylesheet"?>
<!DOCTYPE doc [
<!ATTLIST xsl:stylesheet
id ID #REQUIRED>
]>
<doc>
<!--Start XSL-->
<xsl:stylesheet id="stylesheet"
version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform" >
<xsl:template match="xsl:stylesheet" />
<!--Variables-->
<xsl:variable name="a" select="/doc/list/movie/seen[@value ='Yes']" />
<xsl:variable name="b" select="/doc/list/movie/seen" />
<xsl:variable name="c" select="sum(/doc/list/movie/rating/@value)" />
<xsl:variable name="d" select="$c div count($a)" />
<xsl:variable name="e" select="count($a) div count($b)" />
<xsl:variable name="f" select="/doc/list/movie/seen[@value ='No']" />
<xsl:variable name="g" select="/doc/list/movie/seen[@value ='Prior']" />
<xsl:variable name="h" select="count($f) div count($b)" />
<xsl:variable name="j" select="count($g) div count($b)" />
<xsl:variable name="minutes_total" select="sum(/doc/list/movie/length[@value ='y'])" />
<xsl:variable name="minutes" select="$minutes_total mod 60" />
<xsl:variable name="hours" select="floor($minutes_total div 60) mod 24" />
<xsl:variable name="hours2" select="floor($minutes_total div 60)" />
<xsl:variable name="days" select="floor($hours2 div 24)" />
<!--End Variables-->
<xsl:decimal-format name="percent" />
<xsl:decimal-format name="average" decimal-separator="." />
<xsl:template match="/doc">
<html>
<head>
<style>
h2{
font-family: Courier,Courier New,monospace;
font-size: 32px;
text-decoration: underline;
}
body{
font-family: Courier New,monospace;
}
p{
font-size: 16px;
}
table{
font-size: 14px;
}
.title{
text-align:left;
}
.release{
text-align:center;
}
.seen{
text-align:center;
}
.rating{
text-align:right;
}
.length{
text-align:center;
}
</style>
</head>
<body>
<h2>My Movie List</h2>
<p>Movies seen so far: <xsl:value-of select="count($a)" />/<xsl:value-of select="count($b)" /> = <xsl:value-of select="format-number($e,'#%','percent')" /><br />
Movies yet to see: <xsl:value-of select="count($f)" />/<xsl:value-of select="count($b)" /> = <xsl:value-of select="format-number($h,'percent')" /><br />
Movies seen prior to making list: <xsl:value-of select="count($g)" />/<xsl:value-of select="count($b)" /> = <xsl:value-of select="format-number($j,'percent')" /><br />
Total time watched: <xsl:value-of select="format-number($days,'#0')" /> days,<xsl:value-of select="format-number($hours,'#0')" /> hours,<xsl:value-of select="format-number($minutes,'#0')" /> minutes<br />
Average rating: <xsl:value-of select="format-number($d,'#.000','average')" /> stars out of 5</p>
<br />
<table border="1">
<tr>
<th>#</th>
<th>Title</th>
<th>Release Date</th>
<th>Length</th>
<th>Seen</th>
<th>Rating</th>
</tr>
<xsl:for-each select="list/movie">
<xsl:choose>
<xsl:when test='seen = "Yes"'>
<tr style="background-color:#666; color:#fff">
<td> <xsl:number /></td>
<td class="title"><xsl:value-of select="title"/></td>
<td class="release"><xsl:value-of select="release"/></td>
<td class="length"><xsl:value-of select="length" /> minutes</td>
<td class="seen"><xsl:value-of select="seen"/></td>
<td class="rating"><xsl:value-of select="rating"/></td>
</tr>
</xsl:when>
<xsl:when test='seen = "Seen prior to making list"'>
<tr style="background-color:#999; color:#000">
<td> <xsl:number /></td>
<td class="title"><xsl:value-of select="title"/></td>
<td class="release"><xsl:value-of select="release"/></td>
<td class="length"><xsl:value-of select="length"/> minutes</td>
<td class="seen"><xsl:value-of select="seen"/></td>
<td class="rating"><xsl:value-of select="rating"/></td>
</tr>
</xsl:when>
<xsl:otherwise>
<tr style="background-color:#fff;">
<td> <xsl:number /></td>
<td class="title"><xsl:value-of select="title"/></td>
<td class="release"><xsl:value-of select="release"/></td>
<td class="length"><xsl:value-of select="length" /> minutes</td>
<td class="seen"><xsl:value-of select="seen"/></td>
<td class="rating"><xsl:value-of select="rating"/></td>
</tr>
</xsl:otherwise>
</xsl:choose>
</xsl:for-each>
</table>
</body>
</html>
</xsl:template>
</xsl:stylesheet>
<!--Start XML-->
<list>
<movie>
<title>2001: A Space Odyssey</title>
<release>1968</release>
<seen value="No">No</seen>
<rating>N/A</rating>
<length value="n">141</length>
</movie>
<movie>
<title>28 Days Later</title>
<release>2002</release>
<seen value="No">No</seen>
<rating>N/A</rating>
<length value="n">113</length>
</movie>
<movie>
<title>28 Weeks Later</title>
<release>2007</release>
<seen value="No">No</seen>
<rating>N/A</rating>
<length value="n">100</length>
</movie>
<movie>
<title>A Clockwork Orange</title>
<release>1971</release>
<seen value="Yes">Yes</seen>
<rating value="2">☆☆☆★★</rating>
<length value="y">136</length>
</movie>
<!--Rest of XML-->
</list>
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