[TagCommons-WG] Use Cases for Sharing Tag Data - Summary

[Marja Koivunen]

Nitin Borwankar wrote:
> ....
> To clarify:-
>
> Currently we don't see the differentiation between data source and data 
> type clearly because most tagging sites are implicity tagging only one 
> type of data, del --> bookmarks, flickr --> photos,  etc.
>
> But consider a framework where you have, say, jobs, companies, candidates
> i.e. items could be jobs or companies, users are candidates and I want 
> to display all companies tagged by Joe as "cool" but not all job 
> listings tagged by Joe as "cool".
> Allowing explicitly different types allows different physical schemas, 
> so that contention is reduced, and also allows different access policies 
> etc,. to be applied to different types.  Typing is probably well left as 
> a local matter ie we let individual tagging sources define their typing 
> schema.
>
> Nevertheless we need to build in the understanding at the foundation 
> that tags can have a second level of "fine structure" governed by the 
> kind of items tagged at the tagging source.
>
> Homogenous tag sources del, flickr, .... have a single implicit 
> associated type.
> Heterogenous tag sources need to have an explicit type expressed in a  
> (tag, tagtype, user, item , .....)  tuple.
>   
I don't think type belongs to the structure of the tag/topic but you 
could add that data to the bookmark. But why not just create another set 
of topics/tags stating different source types and share and use them?

In addition, you can also look the metadata of the source file itself.

Marja