Adding a Java library to the DITA-OT classpath parameter

You can use the dita.conductor.lib.import extension point to add an additional Java library to the DITA-OT classpath parameter.


  1. If necessary, compile the Java code into a JAR file.
  2. Create a plugin.xml file that contains the following code:
    <plugin id="plugin-id">
      <feature extension="dita.conductor.lib.import" file="file"/>
    • plugin-id is the plug-in identifier, for example, com.example.addjar.
    • file is the name of the JAR file, for example, myJavaLibrary.jar.
  3. Install the plug-in.


The Ant or XSLT code now can make use of the Java code.


In the following extended example, the myJavaLibrary.jar file performs a validation step during processing, and you want it to run immediately before the conref step. To accomplish this, you will need to use several features:

  • The JAR file must be added to the classpath.
  • The Ant target must be added to the dependency chain for conref.
  • An Ant target must be created that uses this class, and the Ant wrapper integrated into the code.

The files might look like the following:

Figure 1. plugin.xml file
<?xml version="1.0" encoding="UTF-8"?>
<plugin id="com.example.samplejava">
  <!-- Add the JAR file to the DITA-OT CLASSPATH -->
  <feature extension="dita.conductor.lib.import" file="com.example.sampleValidation.jar"/>
  <!-- Integrate the Ant code -->
  <feature extension="" file="antWrapper.xml"/>
  <!-- Define the Ant target that is called, and the location (before conref) -->
  <feature extension="depend.preprocess.conref.pre" value="validateWithJava"/>
Figure 2. antWrapper.xml file
<?xml version="1.0" encoding="UTF-8"?>
  <import file="calljava-antcode.xml"/>
Figure 3. calljava-antcode.xml file
<?xml version="1.0" encoding="UTF-8"?>
<project default="validateWithJava">
  <target name="validateWithJava">
    <java classname="com.example.sampleValidation">
      <!-- The class was added to dost.class.path (the DITA-OT classpath) -->
      <classpath refid="dost.class.path"/>