As we have seen in earlier chapters, an XML layout file contains the information necessary to configure the appearance and layout behavior of the static views presented to the user, and this is still the case when using MotionLayout. For non-static views (in other words the views that will be animated) those views are still declared within the layout file, but the start, end and transition declarations related to those views are stored in a separate XML file referred to as the MotionScene file (so called because all of the declarations are defined within a MotionScene element). This file is imported into the layout XML file and contains the start and end ConstraintSets and Transition declarations (a single file can contain multiple ConstraintSet pairs and Transition declarations allowing different animations to be targeted to specific views within the user interface layout).
The following listing shows a template for a MotionScene file:
<?xml version="...
