+++ /dev/null
-# selector-type-no-unknown
-
-Disallow unknown type selectors.
-
-```css
- unknown {}
-/** ↑
- * This type selector */
-```
-
-This rule considers tags defined in the HTML, SVG, and MathML specifications to be known.
-
-## Options
-
-### `true`
-
-The following patterns are considered violations:
-
-```css
-unknown {}
-```
-
-```css
-tag {}
-```
-
-The following patterns are *not* considered violations:
-
-```css
-input {}
-```
-
-```css
-ul li {}
-```
-
-```css
-li > a {}
-```
-
-## Optional secondary options
-
-### `ignore: ["custom-elements", "default-namespace"]`
-
-#### `"custom-elements"`
-
-Allow custom elements.
-
-The following patterns are considered violations:
-
-```css
-unknown {}
-```
-
-```css
-x-Foo {}
-```
-
-The following patterns are *not* considered violations:
-
-```css
-x-foo {}
-```
-
-#### `"default-namespace"`
-
-Allow unknown type selectors if they belong to the default namespace.
-
-The following patterns are considered violations:
-
-```css
-namespace|unknown {}
-```
-
-The following patterns are *not* considered violations:
-
-```css
-unknown {}
-```
-
-### `ignoreNamespaces: ["/regex/", "string"]`
-
-Given:
-
-```js
-["/^my-/", "custom-namespace"]
-```
-
-The following patterns are *not* considered violations:
-
-```css
-custom-namespace|unknown {}
-```
-
-```css
-my-namespace|unknown {}
-```
-
-```css
-my-other-namespace|unknown {}
-```
-
-### `ignoreTypes: ["/regex/", "string"]`
-
-Given:
-
-```js
-["/^my-/", "custom-type"]
-```
-
-The following patterns are *not* considered violations:
-
-```css
-custom-type {}
-```
-
-```css
-my-type {}
-```
-
-```css
-my-other-type {}
-```