# SVG: `xmlns` * Optional in HTML * Required in XML: `http://www.w3.org/2000/svg` # References [5.1.2. Namespace](https://www.w3.org/TR/2018/CR-SVG2-20181004/struct.html#Namespace): > When using the HTML syntax, the namespace is provided automatically by > the HTML parser. > When SVG is parsed as a XML, for compliance with the Namespaces in XML > Recommendation [xml-names], an SVG namespace declaration must be > provided so that all SVG elements are identified as belonging to the > SVG namespace. > The SVG 2 namespace is `http://www.w3.org/2000/svg`, which is the same > as for earlier versions of SVG.
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