Attack Type Conditions in GUI Trigger

Anyone knows how this condition works?

(Unit: (Attacking unit)'s Weapon Integer Field: Attack Attack Type (‘ua1t’) at Index:1) Equal to 1

Using GUI Triggers, I am trying to create a custom Aura which only gives “critical strike ability“ to ally units who have Magic Attack Attack Type and I found this condition, but don’t know how it works. When I insert number after the “Equal to” as 0 or 1, my custom Aura does give “critical strike ability” to all ally units regardless of their Attack Types. Other than 0 and 1, it results in nothing at all.

  1. What is the meaning of number 0 and 1 in this case?

  2. How do I get my idea to work via this Condition?

no idea but this is a question that might be better posed in the custom games section.