This appears to be an inactive data class. My first guess was that you were gathering one half of the inventory, but not the other. (There are two inventory types in Mobile Management, one through the MDM certificate and the other through the Mobile Management Agent itself. If certain enrollment or configuration errors exist, only half of the inventory will appear for a managed device.)
However, I don't have this data class populated, and it's also not listed in the MMS Implementation Guide as being part of either inventory -- and it does exhaustively list which inventory covers which data class.