| First Indicator Key type # - Relationship to original unknown 0 - Original key 1 - Transposed key | Second Indicator Undefined # - Undefined | 
| Subfield Codes | |
| $a - Key (NR) $6 - Linkage (NR) | $8 - Field link and sequence number (R) | 
The set of pitch relationships that establishes a single pitch class as a tonal centre for a musical work or expression. May be used to differentiate a musical work or expression from another with the same title.
| 100 | 1#$aMahler, Gustav,$d1860-1911.$tLieder nach Rückert.$pIch atmet' einen linden Duft | ||||||||
| 384 | 0#$aD major | ||||||||
| 100 | 1#$aMozart, Wolfgang Amadeus,$d1756-1791.$tConcertos,$moboe, orchestra,$nK. 314,$rC major;$oarranged | ||||||||
| 382 | ##$aflute$aorchestra | ||||||||
| 383 | ##$ano. 2 | ||||||||
| 383 | ##$cK. 285$cK. 314 | ||||||||
| 384 | 1#$aD major | ||||||||
| (03/05/2010) | Contact Us |