[topicmapmail] multiple Source Locators

[Thomas B. Passin]

Jan Algermissen wrote:

> For example, when used with the Web/URIs, an address can NEVER address a piece
> of data, just abstractions of it, because URIs address resources (abstractions), not
> representations (data). That is an architectural property of the Web and it
> IMHO significantly affects the semantics of 'subject locator'.
> 

To be a bit more precise about http: URLs - What you get back when you 
make a GET or POST request is considered to be a *representation* of 
(the state of) the addressed resource.  However, this is not necessarily 
true of an arbitrary URI scheme.

> (To add to the confusion: I personally have dropped the use of subject locators
> alltogether in projects that use Topic Maps and HTTP and instead only use
> subject indicators. This creatly improves interoperability with the 
> technology (browsers) and also with RDF.)

I am going to have to fess up and admit that I have never been quite 
sure what these "locators" are supposed to be.  In particular, I am 
unclear about the relationship between a locator and a good old 
fashioned topic id.  Please enlighten me!

Cheers,

Tom P

-- 
Thomas B. Passin
Explorer's Guide to the Semantic Web (Manning Books)
http://www.manning.com/catalog/view.php?book=passin