The script is used to process the various SVG diagrams used in the vocabulary specification defined by the W3C Verifiable Credential Working Group. The reason for this script is a bug in draw.io in conjunction with links assigned to transparent shapes. The bug has been reported in a github issue; if the bug is taken care of in a later release of draw.io, then this script may become unnecessary.

Note however, that this script also includes an SVGO processing; if the script itself becomes moot, SVGO should still be used. The main reason is to convert the SVG file into a real rescaled graphics, by removing the explicit width and height values from the top level <svg> element. Just for the records, here is the configuration of SVGO as used for the VC diagrams:

{
    plugins: [
        {
            name: 'preset-default',
            params: {
                overrides: {
                    removeMetadata: false,
                    removeTitle: false,
                    removeDesc: false,
                    convertShapeToPath: false,
                    removeViewBox: false,
                }
            }
        },
        'removeDimensions'
    ],
    js2svg: {
        indent: 4,
        pretty: true
    }
}

This script, or SVGO, should be run on the diagram SVG files, as exported from draw.io, before incorporating them into the vocabulary definition files.