• const_preorder_iterator< T > : tree< T >
• const_sibling_iterator< T > : tree< T >
• example : category
• generic_const_iterator< T > : generic_iterator< T >
• mlDTree : dt_node
• preorder_iterator< T > : tree< T >
• relax : problem , label
• sibling_iterator< T > : tree< T >
• word::const_iterator : word::iterator