Convert fig to sk2

What is the difference between .fig and .sk2?

Description: This is a file used for creating line plots in the form of vector images. They include text objects, splines, forms, arcs, lines and arrows. It can contain a set of colors, images and sketches. It was initially developed for the Xfig drawing program, but today it’s used in other drawing editors.; The sk2 file type is a vector graphic format created by the sK1 open source vector graphics editor. It is an extension of the sk1 format and is used to store vector graphics and images. The sk2 file format supports layers, masking, transparency, and other advanced features.