XSL Concepts and Practical Use: Transformations

Using Variables

After variables (or parameters) have been declared, they can be used in two places:

In XSL element attributes that expect an expression. These are summarized in the following table:

XSLT Element Attribute

xsl:apply-templates select

xsl:value-of select

xsl:number value

xsl:for-each select

xsl:if test

xsl:when test

xsl:sort select

In attribute value templates; attribute value templates have the form "{$variable}". They are allowed in the following places:

Element	Attribute
Literal result elements	any attribute
xsl:element	name
xsl:element	namespace
xsl:attribute	name
xsl:attribute	namespace
xsl:number	level
	count
	from
	format
	lang
	grouping-separator
	grouping-size
xsl:sort	order
	lang
	data-type
	case-order
xsl:processing-instruction	name

To insert a literal "{" character in a context where attribute value templates are expanded, use "{{".

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