[wp-hackers] updating guid when changing permalinks

[John Joseph Bachir]

>>> WordPress uses the permalink as the GUID, but any unique identifier 
>>> would do. A post's GUID should never change.
>>> 
>>> That it stops every post from being seen as "new" by RSS readers when 
>>> the permalink structure changes is the most practical reason why.
>> 
>> Right. We don't change the GUID on published posts even if the slug 
>> changes. The code is in wp_insert_post().
>
> Ooohh I see. Where else is GUID used? I suppose the only requirement is 
> that the GUID be universally unique. Which means I shouldn't use slugs 
> at all because they could be reused on a different blog. I guess some 
> combindation of the lyceum installations domain name and the post ID in 
> the database would suffice?


Here's my solution for the Lyceum GUID problem.

   http://source.ibiblio.org/trac/lyceum/changeset/879

Is this effective for WordPress' use of GUID?

John
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