|Allowed Values:||Any Text|
|Default Value:||No Default, all entries must have a unique field value|
|Function:||Reference Value to Identify the Unit for Referencing Elsewhere|
|Examples of Use:||Warrior and Bloodpet units are both UNITCLASS_WARRIOR, so are differentiated through this tag|
This value must be different for every unit in the game, otherwise the entry which is listed latest in the CIV4UnitInfos file will be taken as the actual entry, and the prior fields will be ignored. This data is not displayed in-game however, so even if this field is different between 2 units it is possible for them to appear as the same unit in the game (through setting the Description tag to be the same).