Datasheet

Williams c01.tex V3 - 07/31/2009 2:53pm Page 9
Chapter 1: First Steps with XSLT
<xsl:template match = "p">
<p><xsl:apply-templates/></p>
</xsl:template>
In the next template you match the XML source < attr> (attribute) and < element> names using the
XPath union operator
"|" , and output a containing <code> literal result element. The union operator
performs a logical
OR , matching either of the source element names:
<xsl:template match = "attr | element">
<code>
<xsl:value-of select
= "."/>
</code>
</xsl:template>
The output for an element name will look like this:
<p>An element occurring as a child of the
<code>xsl:stylesheet</code> element is called a
declaration. These top-level elements are all optional, and may
occur zero or more times.
</p>
Copying Content
When content in both the source and the output should be identical, you can simply copy the source
nodes to the result. With the <
xsl:copy> instruction, you copy the source <code> element name and its
content to the output:
<xsl:template match = "code">
<xsl:copy>
<xsl:apply-templates/>
</xsl:copy>
</xsl:template>
Here is the schema definition:
<xs:element name = "copy" substitutionGroup = "xsl:instruction">
<xs:complexType>
<xs:complexContent mixed
= "true">
<xs:extension base
= "xsl:sequence-constructor">
<xs:attribute name
= "copy-namespaces" type = "xsl:yes-or-no" default = "yes"/>
<xs:attribute name
= "inherit-namespaces" type = "xsl:yes-or-no" default =
"yes"/>
<xs:attribute name
= "use-attribute-sets" type = "xsl:QNames" default = ""/>
<xs:attribute name
= "type" type = "xsl:QName"/>
<xs:attribute name
= "validation" type = "xsl:validation-type"/>
</xs:extension>
</xs:complexContent>
</xs:complexType>
</xs:element>
There are two copy instructions in XSLT. The <xsl:copy> instruction is a shallow copy,andcopies
only the context node, but nothing under it. You specify the output in the sequence constructor inside
<xsl:copy>. This instruction is most useful when copying element nodes.
9