Coordinates in the DRM
In the DRM, coordinates are represented as <Location> classes
Each <Location> belongs to a specific SRF
The SRF information is provided at a few organizer classes, and not at the individual <Location> classes
<Environment Root> is one of the 5 classes of objects that specify SRF information
The DRM requires that a <Location> must be valid in the SRF it appears in.