EOData: Ore per system

In my database EOData, I'm about to introduce the concept of oreclass's.

Each system belongs to an ore class, named security class in CCP database,this determines what types of ore are available in the belts. That way I should be able to look up all the systems with a specific ore,number of belts,ect... One of the things I will add is location, with code B for Belt and StS for Static Site(a while back CCP introduced a bunch of landmark sites that respawn completely every 24 hours, some of these contain ore, which isn't reported in the securityclass of a system).

This feature is called securityclass in CCP database because it presumably started out as setting to determine a system security, NPC pirate population and ore types.

It's strange that CCP didn't rename this when they switched over from Oracle to SQL Server