| xsl:sort |
Used to sort elements. It is used within
xsl:for-each and xsl:apply-templates.
It sorts the elements selected by the select attribute
of xsl:for-each or xsl:apply-templates.
Its select attribute specifies the key to be used
for sorting. Example:
|
<![CDATA[
<UL>
<xsl:for-each select="author">
<xsl:sort select="last"/>
<LI>
<xsl:value-of select="last"/>,
<xsl:value-of select="first"/>.
</LI>
</xsl:for-each>
</UL>
]]>
|
The example
lists last name, a comma, first name, and a period,
as an HTML bullet list, sorted by last name.
Something similar may be accomplished as follows:
|
<![CDATA[
<xsl:template match="authorlist">
<UL>
<xsl:apply-templates select="author">
<xsl:sort select="last"/>
</xsl:apply-templates>
</UL>
</xsl:template>
<xsl:template match="author">
<LI>
<xsl:value-of select="last"/>,
<xsl:value-of select="first"/>.
</LI>
</xsl:template>
]]>
|
|
Lab 4E (advanced/optional) |
| xsl:for-each |
Applies a template to each occurrence of an element.
For example:
|
<![CDATA[
<xsl:for-each select="writers/author">
<LI><xsl:value-of select="."/></LI>
</xsl:for-each>
]]>
|
loops through each author element within all
writers elements and outputs its contents as
HTML list items.
|
Lab 4F (advanced/optional) |
| { } |
Generates text for use in an attribute in the
result tree. For example, given this XML data as input:
|
<![CDATA[
<picture>
<href>pretty.jpg</href>
<size width="400"/>
</picture>
]]>
|
We could use the following XSL code to produce an HTML IMG
element:
|
<![CDATA[
<xsl:template match="picture">
<IMG SRC="{href}" WIDTH="{size/@width}"/>
</xsl:template>
]]>
|
This would produce the following element in the result tree:
|
<![CDATA[
<IMG SRC="pretty.jpg" WIDTH="400">
]]>
|
|
Lab 4G (advanced/optional) |
| xsl:variable |
For temporarily storing local data.
In this example, a large string is assembled
by concatenating several small ones into a variable.
XML input data:
|
<![CDATA[
<keywords>
<keyword>literature</keyword>
<keyword>Latin America</keyword>
<keyword>modern classics</keyword>
</keywords>
]]>
|
The following XSL code produces a meta
tag for search engines:
|
<![CDATA[
<xsl:variable name="keywordlist">
<xsl:apply-templates select="keywords" />
</xsl:variable>
<meta name="keywords" content="{$keywordlist}" />
<xsl:template match="keywords">
<xsl:apply-templates select="keyword" />
</xsl:template>
<xsl:template match="keyword">
<xsl:apply-templates />
<xsl:text>, </xsl:text>
</xsl:template>
]]>
|
Output:
|
<![CDATA[
<meta name="keywords" content="literature, Latin America, modern classics, " />
]]>
|
|
