The result attribute defines the assigned name for this filter primitive. If supplied, then graphics that result from processing this filter primitive can be referenced by an in attribute on a subsequent filter primitive within the same <filter> element. If no value is provided, the output will only be available for re-use as the implicit input into the next filter primitive if that filter primitive provides no value for its in attribute.

The spacing attribute indicates how the user agent should determine the spacing between typographic characters that are to be rendered along a path.

The operator attribute has two meanings based on the context it's used in. Either it defines the compositing or morphing operation to be performed.

The style attribute allows to style an element using CSS declarations. It functions identically to the style attribute in HTML.

The unicode-range attribute defines the range of ISO 10646 characters possibly covered by the glyphs in a font.

The xml:lang attribute specifies the primary language used in contents and attributes containing text content of particular elements.

The refY attribute defines the y coordinate of an element's reference point.

The zoomAndPan attribute specifies whether the SVG document can be magnified and panned.

SVG makes use of a number of data types. This article lists these types along with their syntax and descriptions of what they're used for.

The vector-effect property specifies the vector effect to use when drawing an object. Vector effects are applied before any of the other compositing operations, i.e. filters, masks and clips.