Re: ANN: BestBuy.com starts publishing full catalog as RDF/XML using GoodRelations - 27 million triples

Dear Peter:

Peter Ansell wrote:
> I would hardly call it "Linked Data", as they don't use resolvable
> URI's. All of the URI's seem to branch off
> http://products.semweb.bestbuy.com/semanticweb.rdf , and that URI is
> not resolvable to anything. RDF encoded information is good though,
> even if it does have to be trawled using a Sitemap.
>
>   
All individual item URIs, e.g.

http://products.semweb.bestbuy.com/products/8182593/semanticweb.rdf

should be dereferenceable and return a RDF/XML representation with the 
proper media type.

On my machine, it works with Tabulator.

Surprisingly,

curl -I -H "Accept: application/rdf+xml" 
http://products.semweb.bestbuy.com/products/8182593/semanticweb.rdf

and

curl -I -H 
http://products.semweb.bestbuy.com/products/8182593/semanticweb.rdf

return a 405 error:

HTTP/1.1 405 Method Not Allowed
Content-Type: text/html; charset=utf-8
Cache-Control: no-cache
Expires: Fri, 01 Jan 1990 00:00:00 GMT
Date: Tue, 01 Sep 2009 07:21:48 GMT
Server: Google Frontend
Content-Length: 0
Connection: keep-alive

I will check with BestBuy on why that is so,

Now, as for human-readable content: Each RDF/XML representation links to 
the proper human-readable representation via rdfs:seeAlso, e.g. to

http://www.bestbuy.com/site/olspage.jsp?skuId=8182593&type=product&id=1164154035835&cmp=RMX&ky=1whYTIhnZ0ydleik4tkW4Z7Fn1kPFrBgb

I fail to see how and rdfs:seeAlso is worse than a 303 redirect - which 
is hard to implement and maintain on a large-scale corporate Web site 
(see recent .htaccess discussions on this list).

Currently, the human-readable pages, e.g.

http://www.bestbuy.com/site/olspage.jsp?skuId=8182593&type=product&id=1164154035835&cmp=RMX&ky=1whYTIhnZ0ydleik4tkW4Z7Fn1kPFrBgb

don't have a META element in their header that would link to the RDF/XML 
representation. That would be an improvement. It should actually be 
sufficient to insert

<link rel="meta" title="RDF based Metadata in RDF/XML format" 
type="application/rdf+xml" 
href="http://linkeddata.uriburner.com/about/id/<this-page-URL>"

Also, it should be easy for an intelligent agent or tools like URIburner 
to search for graphs that are related to a given human-readable resource.

Simply query e.g. the LOD/LOC dataspace at

http://loc.openlinksw.com/sparql

for all graphs that contain at least one triple of the form

* rdfs:seeAlso <URI-of-current-page>

Also, note that you can easily link the BestBuy data with other 
resources on the basis of equivalent gr:hasEAN_UCC-13 values.

For example, you can search for the best camcorder for your needs using 
the product model data at

http://rdf4ecommerce.esolda.com/camcorder/ (that is not proper linked 
data yet, but still useful)

and then search for suitable offers on the basis of the EAN/UPC code of 
that model.

Such will show up the BestBuy offers.


Best
Martin
> Cheers,
>
> Peter
>
>   

-- 
--------------------------------------------------------------
martin hepp
e-business & web science research group
universitaet der bundeswehr muenchen

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