in particular, such a motif should be "clearly identified so as to retain its identity if modified on subsequent appearances" whether such modification be in terms of rhythm, harmony, orchestration or accompaniment. it may also be "combined with other leitmotifs to suggest a new dramatic condition" or development. the technique is notably associated with the operas of richard wagner, and most especially his "der ring des nibelungen", although he was not its originator and did not employ the word in connection with his work.