Is item.AnnId unique across all items?

[JarJarD3]

It seems that item.AnnId could be unique as IPlayerArmorySet seems to bind player items to it using item.AnnId.
So I could assume that item.AnnId is unique and can be used as unique identifier for items (or actors more generally).

There is also item.ItemUniqueId but that seems volatile and more like current hash for the item.
That could used to check if item has been changed (as its hash would change as well).

[KillerJohn]

As far as I know SEED is the definite unique number for items.
However there is a chance AnnId is unique as well. You should test it!

ANN means "ACDNetworkName" so I it looks related to network synchromization instead of items. All Acds have AnnIds.

[JarJarD3]

I believe that item.AnnId is unique in this "game context" and might be persisted on server for those items that are saved in any Armory Set.

For my purposes if I got one item and want to find all other similar items, this should work:

var similarItems = Hud.Game.Items.Where(x => x.Name == item.SnoItem.NameEnglish && x.AnnId != item.AnnId);

I can always use item location to check that to items are different, but that involves more work to do.
AS I work with

item.Location == ItemLocation.Stash || item.Location >= ItemLocation.Inventory && item.Location <= ItemLocation.Neck

[KillerJohn]

anyways, I would still use IItem.Seed to find "similar" or "same" items if you don't have to actually compare something with armory.