The XSL format allows you to add an external XML file and insert it wherever you want in the original XML file. The external XML file should begin with the <document> tag and end with the </document> tag. Here is an example (020105b.xml):
<document>
<summary>
<heading>MyDVD Rental Store</heading>
<subhead>Periodical Sales Report</subhead>
<description>Sales Report for January, February, and March of 2001</description>
</summary>
</document>
In the XSL file, you need to define the external XML file as a variable, like this:
<xsl:variable name="mydvd_header" select="document('020105b.xml')"/>
And then you place it somewhere, like here:
<H1><xsl:value-of select="$mydvd_header"/></H1>
The full XSL file is shown below. Let's assume that the original XML file is as follows (try it):
<?xml version="1.0"?>
<?xml-stylesheet type="text/xsl" href="020104a.xsl"?>
<sales>
<data>
<month>
<name>January 2001</name>
<week number="1" dvds_rented="12000" />
<week number="2" dvds_rented="15000" />
<week number="3" dvds_rented="18000" />
<week number="4" dvds_rented="11800" />
</month>
<month>
<name>February 2001</name>
<week number="1" dvds_rented="11500" />
<week number="2" dvds_rented="12390" />
<week number="3" dvds_rented="19050" />
<week number="4" dvds_rented="11200" />
</month>
<month>
<name>March 2001</name>
<week number="1" dvds_rented="15300" />
<week number="2" dvds_rented="12390" />
<week number="3" dvds_rented="10050" />
<week number="4" dvds_rented="11230" />
</month>
</data>
</sales>
The outcome of displaying this file in a browser is a combination of the external file (020105b.xml) with the original XML file (020105a.xml):
Here is the XSLT file:
<?xml version="1.0"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<xsl:output method="html"/>
<xsl:param name="forecast" select="50000"/>
<xsl:variable name="mydvd_header" select="document('020105b.xml')"/>
<xsl:param name="weekly_quota" select="12000"/>
<xsl:template match="/">
<HTML>
<HEAD>
<TITLE><xsl:value-of select="//summary/heading"/></TITLE>
</HEAD>
<BODY>
<H1><xsl:value-of select="$mydvd_header"/></H1>
<TABLE>
<TR>
<TH>Month\Week</TH>
<xsl:for-each select="//data/month[1]/week">
<TH>W<xsl:value-of select="@number"/></TH>
</xsl:for-each>
<TH>Total</TH>
<TH>Forecast</TH>
</TR>
<xsl:for-each select="//data/month">
<tr>
<th style="text-align:left"><xsl:value-of select="name"/></th>
<xsl:for-each select="week">
<td>
<xsl:attribute name="style">
<xsl:choose>
<xsl:when test="number(@dvds_rented <= $weekly_quota)">color:red;</xsl:when>
<xsl:otherwise>color:green;</xsl:otherwise>
</xsl:choose>
text-align:right;
</xsl:attribute>
<xsl:value-of select="format-number(@dvds_rented, '###,###')"/>
</td>
</xsl:for-each>
<td style="text-align:right;font-weight:bold">
<xsl:value-of select="format-number(sum(week/@dvds_rented), '###,###')"/>
</td>
<td style="text-align:right;font-weight:bold">
<xsl:value-of select="format-number($forecast, '###,###')"/>
</td>
</tr>
</xsl:for-each>
</TABLE>
</BODY>
</HTML>
</xsl:template>
</xsl:stylesheet>
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