Martin Hepp (UniBW) wrote:
[SNIP]
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>"
The pattern above has evolved, so its more accurate to say the following
re. metadata bearing information resource URLs:
<link rel="meta" title="RDF based Metadata in RDF/XML format"
type="application/rdf+xml"
href="http://linkeddata.uriburner.com/about/id/<scheme>/<authority>/<resource-path-and-or-query-param>"
Examples (based on the Slash based proxy based Generic HTTP URI scheme
of URIBurner service):
HTML+RDFa based Metadata bearing Information Resource URL:
curl -I -H "Accept: application/rdf+json"
"http://linkeddata.uriburner.com/about/id/http/www.bestbuycom/site/olspage.jsp?skuId=9491935&type=product&id=1218115079278";
HTTP/1.1 303 See Other
Server: Virtuoso/05.11.3040 (Solaris) x86_64-sun-solaris2.10-64 VDB
Connection: close
Content-Type: text/html; charset=ISO-8859-1
Date: Tue, 01 Sep 2009 21:41:52 GMT
Accept-Ranges: bytes
Location:
http://linkeddata.uriburner.com/about/html/http/www.bestbuy.com/site/olspage.jsp?skuId=9491935&type=product&id=1218115079278
Content-Length: 13
N3 based Metadata bearing Information Resource URL:
curl -I -H "Accept: text/n3"
"http://linkeddata.uriburner.com/about/id/http/www.bestbuy.com/site/olspage.jsp?skuId=9491935&type=product&id=1218115079278";
HTTP/1.1 303 See Other
Server: Virtuoso/05.11.3040 (Solaris) x86_64-sun-solaris2.10-64 VDB
Connection: close
Date: Tue, 01 Sep 2009 21:38:44 GMT
Accept-Ranges: bytes
TCN: choice
Vary: negotiate,accept
Content-Location:
/about/data/nt/http/www.bestbuy.com/site/olspage.jsp?skuId=9491935%26type=product%26id=1218115079278
Content-Type: text/n3; qs=0.8
Location:
http://linkeddata.uriburner.com/about/data/nt/http/www.bestbuy.com/site/olspage.jsp?skuId=9491935%26type=product%26id=1218115079278
Content-Length: 13
RDF/XML based Metadata bearing Information Resource URL:
curl -I -H "Accept: application/rdf+xml"
"http://linkeddata.uriburner.com/about/id/http/www.bestbuy.com/site/olspage.jsp?skuId=9491935&type=product&id=1218115079278";
HTTP/1.1 303 See Other
Server: Virtuoso/05.11.3040 (Solaris) x86_64-sun-solaris2.10-64 VDB
Connection: close
Date: Tue, 01 Sep 2009 21:33:23 GMT
Accept-Ranges: bytes
TCN: choice
Vary: negotiate,accept
Content-Location:
/about/data/xml/http/www.bestbuy.com/site/olspage.jsp?skuId=9491935%26type=product%26id=1218115079278
Content-Type: application/rdf+xml; qs=0.95
Location:
http://linkeddata.uriburner.com/about/data/xml/http/www.bestbuy.com/site/olspage.jsp?skuId=9491935%26type=product%26id=1218115079278
Content-Length: 13
Note: rdf+json and turtle content-type handling is being fixed
(currently not honoring content negotiation properly). We'll be updating
the notes at <http://uriburner.com> accordingly.
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.
Yes, URIBurner performs LOD cloud lookups amongst other things .
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>
Basically, URIBurner is just an instance of the Virtuoso Sponger, so the
patterns that apply to the URIBurner instance also apply to the LOD
Cloud Cache at: http://lod.openlinksw.com (now that sponging is
enabled), or any Virtuoso instance (public or private).
Kingsley
Best
Martin
Cheers,
Peter
--
Regards,
Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen
President & CEO
OpenLink Software Web: http://www.openlinksw.com
