We will have a large variety of filters and a subset of them will be implementations of all the SVG filters. Separate to our regular raster render process that's used for displaying content to the screen, we'll have an SVG render process used for exporting the graph data to an SVG file. That process will be specifically designed to preserve the purity of the graph data representation such that it encodes all possible operations in the SVG format directly, and resorts to progressive degradation as required to approximate things SVG can't natively represent. That might mean rasterizing some unsupported raster filters, but the ones SVG supports would be used natively.

First in the sense that there's nothing in the industry that's a real product. Certainly there are various experimental concepts people have made as a hobby in a limited capacity, but they don't really count as generally useful tool suites. There's nothing even from the commercial software side of the industry either, which I find surprising. But it gives our project an advantage.