Common Music Notation (CMN) repertoire component declarations.
oLayerA layer that contains an alternative to material in another layer.
Critical apparatus component declarations.
lem(lemma) – Contains the lemma, or base text, of a textual variation.
rdg(reading) – Contains a single reading within a textual variation.
Editorial and transcriptional component declarations.
abbrA generic element for 1) a shortened form of a word, including an acronym
or 2) a shorthand notation.
addMarks an addition to the text.
corrContains the correct form of an apparent erroneous passage.
damageContains an area of damage to the physical medium.
delContains information deleted, marked as deleted, or otherwise indicated as
superfluous or spurious in the copy text by an author, scribe, annotator, or corrector.
expanContains the expansion of an abbreviation.
origContains material which is marked as following the original, rather than
being normalized or corrected.
regContains material which has been regularized or normalized in some
restoreIndicates restoration of material to an earlier state by cancellation of an editorial
authorial marking or instruction.
sicContains apparently incorrect or inaccurate material.
suppliedContains material supplied by the transcriber or editor for any reason.
unclearContains material that cannot be transcribed with certainty because it is illegible
inaudible in the source.
Component declarations that are shared between two or more modules.
layerAn independent stream of events on a staff.
noteA single pitched event.