Category: "#text" | "#phrasing" | "#flow" | "#interactive" | "#heading" | "#sectioning" | "#metadata" | "#embedded" | "#palpable" | "#script-supporting" | "#SVGAnimation" | "#SVGBasicShapes" | "#SVGContainer" | "#SVGDescriptive" | "#SVGFilterPrimitive" | "#SVGFont" | "#SVGGradient" | "#SVGGraphics" | "#SVGGraphicsReferencing" | "#SVGLightSource" | "#SVGNeverRendered" | "#SVGNone" | "#SVGPaintServer" | "#SVGRenderable" | "#SVGShape" | "#SVGStructural" | "#SVGStructurallyExternal" | "#SVGTextContent" | "#SVGTextContentChild"