- From: Jonas Sicking <jonas@sicking.cc>
- Date: Sun, 25 Oct 2009 01:12:12 -0700
- To: John Giannandrea <jg@metaweb.com>
- Cc: public-html@w3.org
On Sun, Oct 25, 2009 at 12:28 AM, John Giannandrea <jg@metaweb.com> wrote: > > Martin McEvoy wrote: >> I am unsure if itemid has any actual practical use (either that of I am >> misunderstanding something). >> Itemid is used as a global Identifier for an Item, its value must be >> valid absolute url, what I am unsure of is how to actually use this? > > One important use case for itemid is when a page wants to identify some web > resource only a subset of whoes data is on the page markup. > > For example imagine a page displaying a TV show, and links to the previous > and next episode names, and when you click on them the JS in the page is > able to request more data from a web service and update the DOM in place. > To do this it needs some token that represents the next episode, which > would be the itemid. > > While you can argue that this identifier could be application and web > service specific there is precedent from RDF that the thing being referred > to in the markup should be a URI uniquely naming the thing. Given that RDF has been deployed for a while now, can you give any example where this feature has been used? I.e. where several *independent* parties have described properties of the same object, and used this identifying mechanism to do it. So in other words where simply using a application or service specific identifying mechanism would not have worked. / Jonas
Received on Sunday, 25 October 2009 08:13:06 UTC