diff -urEbwB modello-2.1.2.orig/modello-core/src/main/java/org/codehaus/modello/ModelloCli.java modello-2.1.2/modello-core/src/main/java/org/codehaus/modello/ModelloCli.java
--- modello-2.1.2.orig/modello-core/src/main/java/org/codehaus/modello/ModelloCli.java	2023-09-04 23:38:10.194571922 +0200
+++ modello-2.1.2/modello-core/src/main/java/org/codehaus/modello/ModelloCli.java	2023-09-04 23:40:24.188819301 +0200
@@ -110,6 +110,10 @@
         if (args.length > 6) {
             parameters.setProperty(ModelloParameterConstants.ENCODING, args[6]);
         }
+
+        if ( args.length > 7 ) {
+            parameters.setProperty( ModelloParameterConstants.DOM_AS_XPP3, args[7] );
+        }
     }
 
     // ----------------------------------------------------------------------
@@ -118,6 +122,6 @@
 
     private static void usage() {
         System.err.println("Usage: modello <model> <outputType> <output directory> <modelVersion> <packageWithVersion>"
-                + "<javaSource> [<encoding>]");
+                + " <javaSource> [<encoding> [<domAsXpp3>]]" );
     }
 }