DB/SummonProperties

struct SummonPropertiesEntry
{
    uint32  Id;                                             // 0
    uint32  Category;                                       // 1, 0 - can't be controlled?, 1 - something guardian?, 2 - pet?, 3 - something controllable?, 4 - taxi/mount?
    uint32  Faction;                                        // 2, 14 rows > 0
    uint32  Type;                                           // 3, see enum
    uint32  Slot;                                           // 4, 0-6
    uint32  Flags;                                          // 5
};

http://dev.trinitycore.org/trinitycore2/src/561ac59c59ac/src/game/DBCStructure.h