# Attribute “xmlns:sketch” not allowed here. > Canonical HTML version: https://rocketvalidator.com/html-validation/attribute-xmlns-sketch-not-allowed-here > Attribution: Rocket Validator (https://rocketvalidator.com) > License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) The `xmlns:sketch` attribute declares the namespace the Sketch design app used for its layer data, and HTML doesn't allow prefixed namespace declarations on `` or any other element. Sketch is a macOS design app from Bohemian Coding. Until version 3.6, it put `xmlns:sketch="http://www.bohemiancoding.com/sketch/ns"` on the root `` of every SVG it exported. The prefix is there for the `sketch:type` attributes, which record what each element was in the Sketch document: `MSPage` on the page group, `MSArtboardGroup` on the artboard, `MSLayerGroup` on a group of layers and `MSShapeGroup` on each shape. Sketch 3.6, released in March 2016, dropped these prefixes to make its SVG exports smaller. An SVG that still carries them was exported before then and ended up in a page or template later. The HTML parser doesn't handle namespace prefixes, so `xmlns:sketch` is a plain attribute with a colon in its name. The validator reports it on any element that carries it, whether that's `` or a `
`. Each `sketch:type` gets its own message too, such as `Attribute "sketch:type" not allowed on element "path" at this point.` Browsers ignore this markup, so removing it doesn't change how the icon looks. Delete `xmlns:sketch` and every `sketch:type` attribute. Removing only the declaration leaves one error per `sketch:type` behind. Delete them together in a standalone `.svg` file too: if a `sketch:type` survives without its declaration, the file is no longer well-formed XML and browsers won't display it. Sketch's export also copies the layer name into `` and adds `<desc>Created with Sketch.</desc>`. Neither one is a validation error. In inline SVG, though, the browser uses `<title>` as the image's accessible name and `<desc>` as its description, so a screen reader can announce "Created with Sketch." Give the `<title>` a name that describes the icon, and delete the `<desc>`. If a build step inlines your SVG files, SVGO removes the Sketch markup for you. Its default preset runs `removeEditorsNSData`, and `http://www.bohemiancoding.com/sketch/ns` is on that plugin's list of editor namespaces, so it deletes the declaration and every `sketch:` attribute. The preset's `removeDesc` plugin deletes a `<desc>` that starts with "Created with". ## Invalid example ```html <svg width="24px" height="24px" viewBox="0 0 24 24" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:sketch="http://www.bohemiancoding.com/sketch/ns"> <title>check Created with Sketch. ``` ## Valid example ```html Checkmark ```