Some apps take ALL types of files so it's imposibble to correctly report mimetypes for them. Inkscape probably doesn't report PNG because it's fileformat is SVG but it takes PNG in drag and drop because it can put it inside SVG.
Some apps take ALL types of files so it's imposibble to correctly report mimetypes for them. Inkscape probably doesn't report PNG because it's fileformat is SVG but it takes PNG in drag and drop because it can put it inside SVG.