The transform attribute defines a list of transform definitions that are applied to an element and the element's children.

The unicode-bidi attribute specifies how the accumulation of the background image is managed.

The vert-origin-x attribute indicates the x-coordinate in the font coordinate system of the origin of a glyph to be used when drawing vertically oriented text.

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 JavaScript exception "invalid class set operation in regular expression" occurs when a double punctuator sequence appears in a v-mode character class but it is not recognized by the syntax.

The underline-thickness attribute represents the ideal thickness of the underline. The underline thickness is expressed in the font's 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 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 vert-origin-y attribute indicates the y-coordinate in the font coordinate system of the origin of a glyph to be used when drawing vertically oriented text.

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