Parallel Coordinates Graph From the QlikView Cookbook

[#1]

In the book "QlikView for Developers Cookbook" the following chart is displayed:

I do not understand how the lines are drawn.

There are two dimensions: Metrics, Location

and an expression: Avg({<Location={*}>} Value)

How does the QV draws the lines?

[#2]

I have tried the following:

Can we say the following:

On X axis there is a dimension: Metrics (with values: White alone, Black ir African American alone... )

On EVERY Y axis there are ALL POSSIBLE Locations. Locations are sorted by some criteria, and for every value in location, the following expression is calculated: Avg({<Location={*}>} Value)

Is this correct?

(The thing that is confusing right now is - how can one dimension (Location) be on the X axis?)