css-namespaces.json

{
  "spec": {
    "title": "CSS Namespaces Module Level 3",
    "url": "https://drafts.csswg.org/css-namespaces-3/"
  },
  "properties": [],
  "atrules": [
    {
      "name": "@namespace",
      "prose": "The @namespace at-rule declares a namespace prefix and associates it with a given namespace name (a string). This namespace prefix can then be used in namespace-qualified names such as the CSS qualified names defined below.",
      "href": "https://drafts.csswg.org/css-namespaces-3/#at-ruledef-namespace",
      "descriptors": [],
      "value": "@namespace <namespace-prefix>? [ <string> | <url> ] ;"
    }
  ],
  "selectors": [],
  "values": [
    {
      "name": "<namespace-prefix>",
      "href": "https://drafts.csswg.org/css-namespaces-3/#typedef-namespace-prefix",
      "type": "type",
      "value": "<ident>"
    }
  ]
}