Bug 191140 Cross tab - Highlight rule expression does not work
Please refer to the attached report design - I define highlight rule expression on the cross tab item - It fails to apply the rule.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/PropertyCommand.java
/**
	 * Remove template definition from module if the definition is no longer
	 * refferenced when setting
	 * <code>IDesignElementModel.REF_TEMPLATE_PARAMETER_PROP</code> null.
	 * 
	 * @param prop
	 *            should be
	 *            <code>IDesignElementModel.REF_TEMPLATE_PARAMETER_PROP</code>.
	 * @param value
	 *            should be null;
	 * @throws SemanticException
	 *             if any semantic exception is thrown.
	 */
	private void clearRefTemplateParameterProp( ElementPropertyDefn prop,
			Object value ) throws SemanticException
	{
		checkAllowedOperation( );
		assert prop != null;
		assert IDesignElementModel.REF_TEMPLATE_PARAMETER_PROP.equals( prop
				.getName( ) );
		ActivityStack stack = module.getActivityStack( );
		stack.startTrans( );
		try
		{
			ElementRefValue templateParam = (ElementRefValue) element
					.getProperty( module, prop );
			TemplateParameterDefinition definition = (TemplateParameterDefinition) templateParam
					.getElement( );
			doSetProperty( prop, value );
			if ( definition != null && !definition.hasReferences( ) )