Re: SVG text flip-invariance

Why is scale=(-1,1) relevant for the text?
Does xcircuit have an x-axis from right to left?
For postscript this is not the case, it is from left
to right, bottom to top.

A simillar problem appears with graphical representations of functions,
data sets, statistical material etc
A program like grace caring about such data has a similar problem for
SVG output, because the y-axis of SVG points down (top to bottom). 
I think, they use a scale(1,-1) and some translations for the complete
set of graphical objects and use additionally a matrix transformation
on each text element (which can be decomposed again in a scale(1,-1)
and some other transformations of course).