Interface ChartJsDatasetMeta

The scale a dataset's values are measured against.

chartjs-chart-pcp is why this is read: its controller gives every dataset its own axis and assigns it here, so a parallel coordinates chart's axes live on the metas rather than in chart.scales -- which holds only the one pcp category scale (#1184).

What Chart.js parsed each of the dataset's values into.

The distribution controllers are the ones that need it. A boxplot or a violin accepts either a raw array of samples or a pre-computed summary, and only this is the same shape for both -- the plugin does the quartile and density work here, so reading dataset.data sees the raw samples of the first form and nothing usable (#1049).

The links a chartjs-chart-graph controller drew, both ends resolved to the element that draws that node.

The one uniform source: measured, this is filled for all three controllers and whether the author declared edges or left the plugin to derive them from parent. The ends are elements, so a reader pairs them back to node positions by identity against data.