A container for annotations that live among the data.
The literal values of attributes prefixed with
data- are assigned on the annotation’s scope.
Attribute dashes are converted to camel case (i.e.,
fooBar: 11 on the scope).
y dimensions of the data which should be used to position the annotation, separated by whitespace.
If this aesthetic is used, both
scaleY must be in scope.
The dimension of the data which should be used to position the annotation.
If this aesthetic is used, one of
scaleY must be in scope, but not both.