The transitionFilter element is an animation element, similar to the animateMotion element defined in the SMIL 2.0 BasicAnimation Module. The animateMotion element animates the position of an element. In contrast, the transitionFilter element animates the progress of a filter behavior (transition) on a media element or elements with renderable content. The filter behavior temporarily alters the visual or aural rendering of the media. The transitionFilter element can target any element with "renderable content", not necessarily a media element. The host language determines which elements to which transitionFilter can be applied. For instance, in HTML, a span or a div may represent "renderable content". The transitionFilter element may target a renderable content element in two ways: it may be the child of that element, or with the targetElement attribute.