A list is represented by the class ODTList. A list can have a sublist, which is represented by the class ODTSubList.
To create a list, we call the constructor of the class ODTList. If we dont't pass any argument, the created list will be empty; we can also pass an array that represents the items of the list.
$list = new ODTList(array('item1', 'item2', 'item3'));
To add items to an existing list, we use addItem($item).
$list->addItem('Item4');
A sublist is represented by the class ODTSubList. Same as ODTList, we can pass an array of items to the constructor, or we can call it without arguments to create an empty sublist; also, we can add items to an existing sublist using the method addItem.
$list = new ODTList(array('item1', 'item2', 'item3'));
$sublist = new ODTSubList(array('item3.1', 'item3.2'));
$sublist->addItem('item3.3');
$list->addSubList($sublist);