Hi Thomas.

I solved this issue by defining all the messages as replies of the first
post, just like you would do for comments on a blog or a picture. This
is also how it is visible to the users on the website.
The order of the replies is preserved indirectly by provinding the
creation date using .

When the subject of the discussion moves away from the main topic it
will be moved to another one or closed. Anyway, even if the content of a
reply seems completely unrelated to the first post from an outside
perspective, the user still intended it to be there, making it
sematically correct to display it as a reply to the first post.

Regards,

John Hoogstrate

Thomas Schandl wrote:
> Hi!
>
> I'm currently working on a SIOC exporter for vBulletin using Alex's
> SIOC PHP API.
> As vBulletin uses flat threads, I was thinking about the correct way
> to use the sioc:has_reply and sioc:reply_of properties for posts.
>
> The problem here is that we can't know for sure which post the author
> of a follow-up post is replying to:
> It could be a reply to the previous post in the thread, to the thread
> starting post or even to multiple posts in the thread.
> So how can we use the sioc:reply_of property for a post in a flat
> thread - should it point to the immediately previous or the thread
> starting post - or even all or none of previous posts? [1]
>
> In a discussion [2] on #sioc irc channel it was proposed to use
> sioc:Thread [3] to indicate that sioc:Posts are part of a discussion.
> It was then suggested to either have
> * each post marked as a reply to the first post or
> * something like a linked list of posts using sioc:next_by_date and/or
> sioc:previous_by_date
> and maybe add a property like sioc:first_post to sioc:Thread so that a
> query is able to find the first post of a thread (sioc:first_post
> being a subproperty of sioc:container_of)
>
> Then rules could be used to deduce more knowledge about the thread and
> its reply structure later.
>
> Any comments and suggestions are very welcomed.
>
> Regards,
> Thomas
>
> [1] Ideally a web forum application would store the IDs of posts that
> are quoted in a reply, but vBulletin doesn't do that in a useful way.
>
> [2] irc logs: http://tuukka.iki.fi/tmp/sioc-2007-11-05.html#12:52:10
>
> [3] sioc:Thread is discussed here:
> http://groups.google.com/group/sioc-dev/browse_thread/thread/e474ee9f0b964ba2/2c5b07a4bbb49361
>
> >
>
>

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