# Attribute “xmlns:sodipodi” not allowed here. > Canonical HTML version: https://rocketvalidator.com/html-validation/attribute-xmlns-sodipodi-not-allowed-here > Attribution: Rocket Validator (https://rocketvalidator.com) > License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) The `xmlns:sodipodi` attribute declares the namespace for editor data that Inkscape inherited from Sodipodi, and HTML doesn't allow prefixed namespace declarations on `` or any other element. Sodipodi was a vector drawing program written mainly by Lauris Kaplinski, and SVG was its native file format. In 2003 a group of its developers forked it to start Inkscape. Sodipodi itself stopped at version 0.34, released in February 2004. Inkscape kept the `sodipodi:` prefix for the features it inherited, so files saved by current versions still declare `xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"` on the root ``. The URI is only a name for the namespace. Nothing downloads that DTD. The prefix marks editor state. ``, a child of the root ``, keeps the document's view settings: page and border colors, the grid, zoom and window position, the current layer, and any guide lines as `` children. On the root element, `sodipodi:docname` records the file name the drawing was last saved under. Shapes and text carry their own `sodipodi:` attributes. `sodipodi:nodetypes` on a path has one letter per node (`c` for cusp, `s` for smooth, `z` for symmetric, `a` for auto-smooth), which the node tool reads to decide how a node's handles move. `sodipodi:type` marks a path drawn with a shape tool, such as `star`, `arc` or `spiral`, and attributes like `sodipodi:sides` and `sodipodi:r1` keep the shape's parameters so Inkscape can bring its handles back. Lines of text get `sodipodi:role="line"` on their ``. Browsers ignore all of it, and a star is drawn from the path's `d` attribute like any other path. The HTML parser doesn't link prefixes to declarations. To it, `xmlns:sodipodi` is one attribute with a colon in its name and `sodipodi:docname` is another, and nothing connects the two. Delete only the declaration and every other `sodipodi:` name still fails on its own. The invalid example below gets 13 errors, and only one of them is about `xmlns:sodipodi`. The other 12 come from the `sodipodi:` attributes, such as `Attribute "sodipodi:type" not allowed on element "path" at this point.`, and from `` and ``, which the validator reports as completely-unknown elements in SVG content. Delete `xmlns:sodipodi`, the `` element with everything inside it, and every attribute that starts with `sodipodi:`. The image looks the same afterwards. Only Inkscape notices: the guides, grid and page settings are gone, and stars and spirals reopen as plain paths. Keep the original file for editing and put a cleaned copy in the page. The same Inkscape file usually declares `xmlns:inkscape`, `xmlns:rdf`, `xmlns:cc` and `xmlns:dc` too, and each gets its own message. SVGO's `removeEditorsNSData` plugin, part of its default preset, removes the Sodipodi declaration and every `sodipodi:` element and attribute, and does the same for those four namespaces. If the whole file was pasted in, its `` line comes along too, and the validator reports it as an XML processing instruction. ## Invalid example ```html ``` ## Valid example ```html ```