Demo of [Perspective](https://github.com/perspective-dev/perspective).

This example of a `<perspective-workspace>` dashboard is generated from one
[Apache Arrow](https://arrow.apache.org/) source dataset, converted originally
from this
[XLS from a Tableau presentation](https://community.tableau.com/docs/DOC-1236).
This layout is just an example; you can explore your own visualizations in the
Perspective configuration menu, accessed by clicking the dropdown arrow in each
pane's upper left, or advanced options in the pane's right-click context menu.
