variable:TypeOf

note

This article is about the variable:TypeOf Blend function.

variable:TypeOf

Returns the name of the XSLT 1.0 data type that a given variable is currently cast to.

The return value is one of the string values nodeset, string, number, boolean.

Syntax

Namespace declaration

You need to declare this namespace only if you call the function directly from the USCSXSL component but outside Blend. In a Blend context (ublendit.exe, uscsxsl.blend()) the namespace is already declared in the Blend transformation, which is in xsl\Util\Batch.1.0.xsl in your USoft installation folder.

xmlns:variable="USoft:Variable"

Function call

variable:TypeOf( *xpath >> string* )

The required xpath must evaluate to a string that is the name of an instantiated variable. If there is no instantiated variable by that name, the return value is nodeset.

Example 1

The result of the following is boolean:

<pc:assign-boolean defined="{true()}" />
<pc:assign-string mytype="{variable:TypeOf($defined)}"/>
<pc:value-of select="$mytype"/>

Example 2

A variable may be initialised and have the empty string ( '' ) as a value. The result of the following is string:

<pc:assign-string defined="" />
<pc:assign-string mytype="{variable:TypeOf($defined)}"/>
<pc:value-of select="$mytype"/>

Example 3

If no variable by the name of "defined" is instantiated, the result of the following is nodeset:

<pc:assign-string mytype="{variable:TypeOf($defined)}"/>
<pc:value-of select="$mytype"/>