static {
        setMetaClass(GroovySystem.getMetaClassRegistry().getMetaClass(DomNode.class), DomNode.class);
    }
    
    public String getPublicId() {
        return publicId;
    }

    public void setPublicId(String publicId) {
        this.publicId = publicId;
    }

    public String getSystemId() {
        return systemId;
    }

    public void setSystemId(String systemId) {
        this.systemId = systemId;

        if (!"1.3".equals(version)) {
            rootAttributes.put("xmlns:xsi", "http://www.w3.org/2001/XMLSchema-instance");
        }
        if ("1.3".equals(version)) {
            root.setPublicId("-//Sun Microsystems, Inc.//DTD J2EE Application 1.3//EN");
            root.setSystemId("http://java.sun.com/dtd/application_1_3.dtd");
        } else if ("1.4".equals(version)) {