The from attribute indicates the initial value of the attribute that will be modified during the animation.

The keyPoints attribute indicates the simple duration of an animation.

The gradientTransform attribute contains the definition of an optional additional transformation from the gradient coordinate system onto the target coordinate system (i.e., userSpaceOnUse or objectBoundingBox). This allows for things such as skewing the gradient. This additional transformation matrix is post-multiplied to (i.e., inserted to the right of) any previously defined transformations, including the implicit transformation necessary to convert from object bounding box units to user space.

The crossorigin attribute, valid on the <image> and <feImage> elements, provides support for configuration of the Cross-Origin Resource Sharing (CORS) requests for the element's fetched data.

The panose-1 attribute indicates the Panose-1 number of a font face.

The slope attribute defines the values for linear filters, such as brightness.

The opacity attribute specifies the transparency of an object or of a group of objects, that is, the degree to which the background behind the element is overlaid.

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 z attribute defines the location along the z-axis for a light source in the coordinate system established by the primitiveUnits attribute on the <filter> element, assuming that, in the initial coordinate system, the positive z-axis comes out towards the person viewing the content and assuming that one unit along the z-axis equals one unit in x and y.

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