The stemh attribute indicates the horizontal stem width of the font.

The pointsAtY attribute represents the y location in the coordinate system established by attribute primitiveUnits on the <filter> element of the point at which the light source is pointing.

The transform-origin SVG attribute sets the origin for an item's transformations.

The textLength attribute, available on SVG <text> and <tspan> elements, lets you specify the width of the space into which the text will draw. The user agent will ensure that the text does not extend farther than that distance, using the method or methods specified by the lengthAdjust attribute. By default, only the spacing between characters is adjusted, but the glyph size can also be adjusted if you change lengthAdjust.

The text-anchor attribute is used to align (start-, middle- or end-alignment) a string of pre-formatted text or auto-wrapped text where the wrapping area is determined from the inline-size property relative to a given point.

The vert-adv-y attribute indicates the vertical advance after rendering a glyph in vertical orientation.

The widths attribute indicates a list of range values, each followed by one or more glyph widths.

The x-height attribute indicates the height of lowercase glyphs in the font within the font coordinate system.

The version attribute is used to indicate what specification a SVG document conforms to. It is only allowed on the root <svg> element. It is purely advisory and has no influence on rendering or processing.

The underline-thickness attribute represents the ideal thickness of the underline. The underline thickness is expressed in the font's coordinate system.