@classmethod
def leaf_list(cls, name, parent=None, interleave=None):
    """Create _list_ node for a leaf-list."""
    node = cls('_list_', parent, interleave=interleave)
    node.attr['name'] = name
    node.keys = None
    node.minEl = '0'
    node.maxEl = None
    node.occur = 3
    return node
