Schema for MusicnetComponents The following simple type constraints are generated from database content These includes introduce new complex types The complex type MusicnetComponent is main type that is present in MusicNet XML files. The type MusicnetComponentBase describes all the possible content that can appear in any MusicNet component. (A union if you will.) MusicnetComponent, MusicnetComponentParent and MusicnetComponentTrack are concrete types that restrict the base for specific component types. MUSICNET COMPONENT CODE root Parent compoent (i.e. component with zero or more children) Child component that is a TRACK Components without children (i.e single component) All of the possible component types Component types that can be parent components (MusicnetComponentParent) Component types the can single components (MusicnetComponent) Sub types are ignored. Complex types used in the definition of a component. Prices and rights are defined in their own xsd files Describes a relationship with another component