IT Assistant v7 Database Documentation

I need to build a custom application using some of the data that is in the ITAssistant v7 database.   Is there a document anywhere that describes all of the fields in the ITAssist Database and what their values are? 

 

For instance, DeviceGlobalStatus can be a 1,2,4 etc..   Is there a document that says what the DeviceGlobalStatus field is, and what 1,2,4 stands for? 

 

Just a general schema documentation would be nice.

 

Thanks,

MarkS.