How to Import stylesheets in xslt conditionally?

Question

Is there any way to import stylesheets after checking some conditions?

Like,if the value of variable $a="1" then import 1.xsl or else import 2.xsl.

Answer 1

Hi All, Is there any way to import stylesheets after checking some conditions?

Like,if the value of variable $a="1" then import 1.xsl or else import 2.xsl.

No, the <xsl:import> directive is only compile-time.

In XSLT 2.0 one can use the use-when attribute for a limited conditional compilation.

For example:

<xsl:import href="module-A.xsl" 
     use-when="system-property('xsl:vendor')='vendor-A'"/>

The limitations of the use-when attribute are that there is no dynamic context when the attribute is evaluated -- in particular that means that there are no in-scope variables defined.

A non-XSLT solution is to dynamically change the href attribute of the <xsl:import> declaration before the transformation is invoked:

1. Parse the xsl stylesheet as an XML file

2. Evaluate the condition that determines which stylesheet should be imported.

3. Set the value of the href attribute of the <xsl:import> declaration to the URI of the dynamically determined stylesheet-to-be-imported.

4. Invoke the transformation with the in-memory xsl stylesheet that was just modified.