{
    "<font-weight-absolute>": {
        "spec": "https://drafts.csswg.org/css-fonts-4/#font-weight-absolute-values",
        "grammar": "[ normal | bold | <number [1,1000]> ]"
    },
    "<paint>": {
        "spec": "https://svgwg.org/svg2-draft/painting.html#SpecifyingPaint",
        "grammar": "none | <color> | <url> [none | <color>]?",
        "__comment": "FIXME: Support context-fill and context-stroke values here"
    },
    "<symbol>": {
        "spec": "https://drafts.csswg.org/css-counter-styles-3/#typedef-symbol",
        "grammar": "<string> | <custom-ident>",
        "__comment": "AD-HOC: The spec actually defines this as '<string> | <image> | <custom-ident>' but the image portion is considered at-risk and no other browser supports it"
    }
}