XSLT Value of

The xsl:value-of element can be used to compute generated text,within a template. for example by inserting the value of a variable or by extracting text from the source tree. The xsl:value-of element does this with an Expression that is specified as the value of the select attribute. Expressions also be used inside attribute values of literal result elements by enclosing the expression in curly braces ({}).

Generating Text: xsl:value-of

< value-of
select= string-expression
disable-output-escaping= >
<-- Content: -->
< /value-of>

The xsl:value-of tag is instantiated to create a text node in the result tree. The select attribute is an Expression; this expression is evaluated and the resulting object is converted to a string as if by a call to the string function.The string specifies the string-value of the created text node.No text node will be created, if the string is empty. The created text node will be merged with any adjacent text nodes.

without converting it to a string the xsl:copy-of element can be used to copy a node-set over to the result tree.

The following example creates an HTML paragraph from a person element with given-name and family-name attributes.The paragraph will contain the value of family-name attribute of the current node and the given-name attribute of the current node followed by a space.

<xsl:template match="person">
<p>
<xsl:value-of select="@given-name"/>
<xsl:text> </xsl:text>
<xsl:value-of select="@family-name"/>
</p>
</xsl:template>

The following example creates an HTML paragraph from a person element with given-name and family-name children elements. The paragraph will contain the string-value of the first given-name child element of the current node followed by a space and the string-value of the first family-name child element of the current node.

<xsl:template match="person">
<p>
<xsl:value-of select="given-name"/>
<xsl:text> </xsl:text>
<xsl:value-of select="family-name"/>
</p>
</xsl:template>

Example:

<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"><xsl:template match="/">
<html>
<body>
Book Collection
<table border="1">
<tr bgcolor="#9acd32">
<th>Book</th>
<th>Price</th>
</tr>
<tr>
<td><xsl:value-of select="catalog/store/Book"/></td>
<td><xsl:value-of select="catalog/store/price"/></td>
</tr>
</table>
</body>
</html>
</xsl:template></xsl:stylesheet>

Output

Book Collection

Book	Price
XSLT	543

Notice that only one line of data was copied from the XML document to the output.

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