[TagCommons-WG] mechanisms for sharing tag data

[Richard Newman]

> Ok, so to clarify my statement about types, I am looking at tag
> applications that may not be web applications.
> In my mind tags are associated directly with a data item whose address
> may just be an integer id in a relational database.
> An example of an app that is useful but not a web app would be a rich
> client email app that has GMail like personal tags.  No notion of  
> URL is
> applicable and yet we need to be able to discuss and use whatever tag
> formalisms we devise here.

A notion of a *URI* is applicable -- anything that has a unique  
identifier can be mapped to a point in a URI space.

For example, your phone's camera application's pictures might be  
referenced by:

urn:cam:$imei/$dateTime/$unique-id

Just because the data store doesn't use URIs internally doesn't mean  
that its identifiers cannot map to a URI scheme, such that you can  
unambiguously store and retrieve data via those URIs.