i just finished my GSoC project "better css support" under which i implemented CSS3 structural pseudo selectors.

all work is made into single patch along with a readme.

after applying patch you can find test files inside master/testfiles.

link: https://gitlab.com/diehumbleX/inkscape/tree/master/GSoC-2017

It would be great to have your feedback.

Thank you for your valuable time!

Vishal(Diehumblex)