NODE_TYPE
#define IS_BNODE(x) (NODE_TYPE(x) == NAME_ATTR_OWNER_TYPE_BNODE)
#define IS_PNODE(x) (NODE_TYPE(x) == NAME_ATTR_OWNER_TYPE_PNODE)
#define IS_MNODE(x) (NODE_TYPE(x) == NAME_ATTR_OWNER_TYPE_MNODE)
#define IS_HNODE(x) (NODE_TYPE(x) == NAME_ATTR_OWNER_TYPE_HNODE)