XSLT 2.0 processor required

Berlioz requires an XSLT 2.0 processor on the runtime classpath. The JDK's built-in Xalan only supports XSLT 1.0 and cannot run Berlioz stylesheets.

XSLT 3.0 is recommended if you use JSON output, as it enables the native JSON serialisation features.

Add Saxon-HE to your web application's runtime classpath (Saxon PE and Saxon EE are also supported and provide additional features):

Gradle:

runtimeOnly("net.sf.saxon:Saxon-HE:13.0")

Maven:

<dependency>
  <groupId>net.sf.saxon</groupId>
  <artifactId>Saxon-HE</artifactId>
  <version>13.0</version>
  <scope>runtime</scope>
</dependency>