Chart/trace type label (e.g., "Bar Chart", "Line Plot")
Chart title
Axes information
Chart-specific summary statistics
OptionalguideA plain-language introduction to the chart type named by chartType. Absent when there is nothing to introduce.
OptionalsubplotsList of all subplots in the figure, populated only when the figure has more than one subplot. Lets users see what other subplots are available without having to navigate through them.
OptionallayersEvery layer of the subplot this description was taken from, populated only when the subplot has more than one. The dialog renders these as tabs, so a reader is told how many layers there are and which one they are on, and can switch to another without leaving the description.
OptionaltitleWhere title came from: the layer the reader is on, or the figure it sits
in. Absent when there is no authored title at all.
The dialog resolves one from the other, and used to render the winner as a
bare "Title" either way — while l t, which implements the same
precedence, is careful to say "Subplot title" or "Figure title" in a
multi-panel figure so the announcement names its own source.
A description whose values have been rounded for display — what
DescriptionServicehands the ViewModel, and what the dialog renders.The one difference from DescriptionState is the cell type: a multi-value cell has been rounded value by value and joined by the time it gets here, so the view never has to deal with an array.