+ - note tied to previous; . - note dotted; .. - note double dotted Uncapitalized letters represent notes that are staccato Irregular groupings are notated above the duration line Duration letters will always appear directly above the note/fret number it represents the duration for. Duration letters with no fret number below them represent rests. Multi- bar rests are notated in the form Wxn, where n is the number of bars to rest for. Low melody durations appear below the staff Tablature Legen (azchords.com)
