Bug: Appearance Action uses sequence instead of choice in XSD schema
The Appearance Action states cardinality 1..1 for both LightStateAction and AnimationAction. Most likely it was intended to make either of those two mandatory. However, in the xsd schema, "sequence" is used instead of "choice". Effects for users: When using an editor with auto-completion you will always get both actions as children. Files having only a LightStateAction without an AnimationAction on the same hierarchy are strictly not schema conform.