labeling priority for SVG

[grandfso]

Hello, I would like to ask if there's any way to set priorities for labels. The desired outcome is to supress printing of the labels, if directly above the label there's another label with higher priority (or was rendered first/last).
I am using labels, but can't make the overlapping labels look pleasantly. Example can be seen here radek.cc.cu/map.svg - see south

the current SVG CSS selectors doesn't allow to achieve a result like this, but SVG can possibly take much more attributes and settings. can this be added ?

cheers!