XSLT conditional include of external file

Question

I want to perform a conditional include in XSLT, but xsl:include is a top level element. You can only use xsl:if or xsl:choose inside of a template. Is there any kind of hac

Answer 1

With the addition of static parameters, this is now possible in XSLT 3.0. Static parameters can be used in the use-when attribute of the xsl:include.

Now we can declare parameters with default values of false() and then override the ones we need at run time...

Here is a full working example tested with Saxon-HE v9.7 (also tested with Saxon-PE 9.5).

XML Input (test.xml)

Main XSLT 3.0 (test_main.xsl)

First possible included XSLT 3.0 (test_inc1.xsl)

  
    INCLUDE FILE 1!!!
  

Second possible included XSLT 3.0 (test_inc2.xsl)

  
    INCLUDE FILE 2!!!
  

Command line (setting inc2 to true)

java -cp "saxon9he.jar" net.sf.saxon.Transform -s:"test.xml" -xsl:"test_main.xsl" inc2="true"

Output

   INCLUDE FILE 2!!!