dlmtr_new()instantiates a newdlmtrnode.dlmtr_type()checks if the node is adlmtrnode.dlmtr_<child>_get()returns the<child>node ofdlmtr.dlmtr_<child>_set()sets the new<child>and deletes the old<child>.dlmtr_<child>_rep()sets the new<child>and returns the old<child>.