UUID's and what they are good for

Does anybody know how long a UUID is good for? I want to know about sim boundaries and how long before they are reassigned

As far as I know, the UUID for a specific object (texture, sound, avatar etc) is always the same and does not expire.

Thanks that's exactly what I wanted to hear. I believe that llKey2Name only works if the person is in the same sim and online.

UUID's for Avatar's are indeed for life. However Objects are given new UUID's every time they are rezzed.

"anytime they are rezzed" includes moving to another sim.
Attached prims will change keys when you cross a sim border.

Objects have a new UUID every time they are rezzed from an inventory.
Non-objects have a permanent UUID.


No, attached or detached prims don't get re-rezzed and don't get a new key when entering a new region.

A caveat to this is Notecards. Everytime they are edited and saved they get a new UUID.

one of the tricks to moving a networked server, is to wear it off the ground, then travel to the new location, and drop it in the new location... thus maintaining the same UUID for the trip.

Other questions are... what about no copy items? wouldn't they, naturally, keep the same UUID for life?

What about attaching and unattaching? What about relogging while wearing an attachment?

The permissions of an object depend on all permissions of the items the object is made of.
You can change the object's permissions by adding/removing items while it's rezzed so the permanence of the key is not so permanent.
However a no copy AND no modify object would be more likely to have a permanent key.
Notice : all primitives, linked or not, do have a key.



New rez so new key.

Thanks for all the replies guys, I think I got what I was after

This is interesting, thanks. So it is just really non-rezzable objects that keep their UUID.

What about a no-copy object? Does the UUID for a no-copy object change when it is rezzed?

the fact that notecards get new UUID's after edits make notecard contract easier .. the trick would be to put the UUID of the notecard into the notecard without editing it.

Would it be possible to put a notecards UUID into it, or, would putting the UUID into it after getting it's asset UUID change the notecard?

I suppose you could have another card .. or have people agree in chat that they are recieving the notecard with xyz UUID .. then you can make the notecard no modify. Does its UUID then ever change? Some nice ideas for experimenting.

I've found it makes it a real pain. If I have a notecard that I may update for new /improved features then rather than having the UUID of it in my scripts I have to issue the notecard with the script.

Notecards are a pain in general. I find that they often get 'corrupted' data in them, don't take inserts of landmarks/objects/pictures/etc. well (I'd say 20% of 'inserted' items tend to corrupt within a week), etc.

From a scripting point of view any inserted objects are a no-no as they make teh sdata server return NULL data.

Whoah. That's pretty interesting, I never thought of trying that before.

Not many people I've talked to seem to know, but there is a Notary Service in SL called Nota Beene. They will verify your document (notecard), allow all parties to sign it, and then have it notarized offworld. Everone then gets an object that allows for verification and reading of the document. Base price for 2 signatures is 100L, 50L for each signataure after that I believe. I use this for all important documents (business deals ect.) in world.