type alias NamespaceURIimport { type NamespaceURI } from "https://deno.land/x/deno_dom@v0.1.43/src/dom/document.ts"; definition: "http://www.w3.org/1999/xhtml" | "http://www.w3.org/2000/svg" | "http://www.w3.org/1998/Math/MathML"