- From: Steve Harris <steve.harris@garlik.com>
- Date: Wed, 20 May 2009 18:16:55 +0100
- To: Kingsley Idehen <kidehen@openlinksw.com>
- Cc: semantic-web at W3C <semantic-web@w3c.org>, semanticweb@yahoogroups.com, public-lod@w3.org
On 20 May 2009, at 16:38, Kingsley Idehen wrote: > Steve Harris wrote: >> Alternatively you could put that data in a RDF store, and just >> serve up the fragments using a wrapped CONSTRUCT query. >> >> That's what we do for qdos.com, eg >> http://qdos.com/user/Steve-Harris/18b6f60b41e05aaa418565ebfe901d6b/rdfxml >> and it's pretty efficient, more efficient that storing 1000 >> separate files as XML. >> >> The downside is that the RDF is not very pretty to look at, but it >> could be with a better RDF/XML serialiser. >> >> - Steve > Steve, > > The data is already in an RDF Store. Of course, you can add yours > etc. :-) > > Martin should have sent links like: > > 1. http://tr.im/lThV -- the whole ontology > 2. http://tr.im/lTiC -- sampling of Products or Service Model > instance data Cool, how do I for eg. get the immediate data around http://openean.kaufkauf.net/id/EanUpc_0001067792600 out? It's not obvious how you request it. Do I just issue SPARQL to somewhere? The SPARQL link at the bottom goes to a page about SPARQL. I poked around for a bit and tried http://lod.openlinksw.com/sparql?query=DESCRIBE+%3Chttp%3A%2F%2Fopenean.kaufkauf.net%2Fid%2FEanUpc_0001067792600%3E&output=n3 but it gives an error, so I'm not sure what I did wrong. - Steve >> On 20 May 2009, at 14:59, Martin Hepp (UniBW) wrote: >> >>> Hi Steve, >>> as I replied to Libby (but did not include all mailing lists): The >>> whole data set is served from currently 100 smaller files, which >>> will be broken down to 1000 files shortly. For various reasons >>> however, we don't want to serve one file per element, because that >>> will create a huge overhead - the individual data sets are rather >>> small (a few triples per item). Having one million micro-files is >>> hard to manage. Also, since we want to stay within OWL DL, we >>> would have to duplicate proper ontology header meta-data a million >>> times. >>> >>> Thus, we use a (rather large) set of rules in the .htaccess file >>> to serve that part of the data set that contains the element you >>> are actually looking for. You will receive a few more triples than >>> you need, but simply discard those ;-) >>> >>> Martin >>> >>> Steve Harris wrote: >>>> Very cool resource. >>>> >>>> On 20 May 2009, at 10:18, Libby Miller wrote: >>>>>> Individual commodity descriptions can be retrieved as follows: >>>>>> >>>>>> http://openean.kaufkauf.net/id/EanUpc_<UPC/EAN> >>>>>> >>>>>> Example: >>>>>> >>>>>> http://openean.kaufkauf.net/id/EanUpc_0001067792600 >>>>> >>>>> This seems to give me multiple product descriptions - am I >>>>> misunderstanding? >>>> >>>> Yeah, looks like it returns the entire document that the >>>> particular EAN appears in. >>>> >>>> Not very linked data friendly (you'll end up with a large >>>> proportion of repeated triples in identical graphs, with >>>> different graph URIS), but certainly better than nothing. >>>> >>>> - Steve >>>> >>> >>> -- >>> -------------------------------------------------------------- >>> martin hepp >>> e-business & web science research group >>> universitaet der bundeswehr muenchen >>> >>> e-mail: mhepp@computer.org >>> phone: +49-(0)89-6004-4217 >>> fax: +49-(0)89-6004-4620 >>> www: http://www.unibw.de/ebusiness/ (group) >>> http://www.heppnetz.de/ (personal) >>> skype: mfhepp >>> >>> Check out the GoodRelations vocabulary for E-Commerce on the Web >>> of Data! >>> = >>> = >>> = >>> = >>> ==================================================================== >>> >>> Webcast explaining the Web of Data for E-Commerce: >>> ------------------------------------------------- >>> http://www.heppnetz.de/projects/goodrelations/webcast/ >>> >>> Tool for registering your business: >>> ---------------------------------- >>> http://www.ebusiness-unibw.org/tools/goodrelations-annotator/ >>> >>> Overview article on Semantic Universe: >>> ------------------------------------- >>> http://www.semanticuniverse.com/articles-semantic-web-based-e-commerce-webmasters-get-ready.html >>> >>> Project page and resources for developers: >>> ----------------------------------------- >>> http://purl.org/goodrelations/ >>> >>> Upcoming events: >>> --------------- >>> Full-day tutorial at ESWC 2009: The Web of Data for E-Commerce in >>> One Day: A Hands-on Introduction to the GoodRelations Ontology, >>> RDFa, and Yahoo! SearchMonkey >>> >>> http://www.eswc2009.org/program-menu/tutorials/70 >>> >>> Talk at the Semantic Technology Conference 2009: Semantic Web- >>> based E-Commerce: The GoodRelations Ontology >>> >>> http://www.semantic-conference.com/session/1881/ >>> >>> <martin_hepp.vcf> >> > > > -- > > > Regards, > > Kingsley Idehen Weblog: http://www.openlinksw.com/blog/~kidehen > President & CEO OpenLink Software Web: http://www.openlinksw.com > > > > -- Steve Harris Garlik Limited, 2 Sheen Road, Richmond, TW9 1AE, UK +44(0)20 8973 2465 http://www.garlik.com/ Registered in England and Wales 535 7233 VAT # 849 0517 11 Registered office: Thames House, Portsmouth Road, Esher, Surrey, KT10 9AD
Received on Wednesday, 20 May 2009 17:17:30 UTC