Vega-lite: Too many `point`? (mark, selection, scale type)

[kanitw]

We currently use point to create scatterplots in Vega-Lite (similar to Tableau and ggplot2).
However, the same thing is called symbol in Vega.

Since we are adding point selection and there is the new point scale, I wonder if we're using the term "point" too often.

For these reasons, I wonder if we should rename point mark to symbol?

(I don't have strong opinion about this -- just wanna raise a point for us to consider since this is a good time to rename if we want to do so.)

cc: @jheer @domoritz @arvind

[g3o2]

How about dot? symbol would be the same as it's vega pendant, which might lead to confusion.

[jheer]

I think we should be extremely reticent to rename anything without a strong rationale. Why introduce confusion to existing users without a good reason? I argue we should rename point/list selections (which have no user base yet) to single/multi (or similar).

[domoritz]

I'd also rather rename the selections than the mark.