- From: Martin Hepp (UniBW) <martin.hepp@ebusiness-unibw.org>
- Date: Tue, 01 Sep 2009 15:13:50 +0200
- To: giovanni.tummarello@deri.org
- CC: "public-lod@w3.org" <public-lod@w3.org>
- Message-ID: <4A9D1E0E.2050707@ebusiness-unibw.org>
Hi Giovanni:
Giovanni Tummarello wrote:
> Hi Martin, all,
>
> the sitemap exposed is not a Semantic Sitemap
>
> Semantic Sitemap: http://products.semweb.bestbuy.com/sitemap.xml
>
> but simply gives the location of the dumps.
>
>
As far as I see, the sitemap at
http://products.semweb.bestbuy.com/sitemap.xml
gives the locations of the compressed semantic sitemaps:
<?xml version="1.0" encoding="UTF-8"?>
<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<sitemap>
<loc>http://products.semweb.bestbuy.com/sitemap1.xml.gz</loc>
<lastmod>2009-07-31T18:23:17+00:00</lastmod>
</sitemap>
Each one of those seems to be a proper semantic sitemap
E.g.
http://products.semweb.bestbuy.com/sitemap1.xml.gz
-->
<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
xmlns:sc="http://sw.deri.org/2007/07/sitemapextension/scschema.xsd">
<sc:dataset>
<sc:datasetLabel>Sitemap data for Best Buy Co., Inc., products.
Data based on http://purl.org/goodrelations/</sc:datasetLabel>
<sc:datasetURI>http://products.semweb.bestbuy.com/</sc:datasetURI>
<sc:linkedDataPrefix
slicing="subject-object">http://products.semweb.bestbuy.com/</sc:linkedDataPrefix>
<sc:sampleURI>http://products.semweb.bestbuy.com/products/9380001/semanticweb.rdf</sc:sampleURI>
<sc:dataDumpLocation>http://products.semweb.bestbuy.com/products/43900/semanticweb.rdf</sc:dataDumpLocation>
<sc:dataDumpLocation>http://products.semweb.bestbuy.com/products/48521/semanticweb.rdf</sc:dataDumpLocation>
<sc:dataDumpLocation>http://products.semweb.bestbuy.com/products/48530/semanticweb.rdf</sc:dataDumpLocation>
<sc:dataDumpLocation>http://products.semweb.bestbuy.com/products/54256/semanticweb.rdf</sc:dataDumpLocation>
> in theory if this information is exposed as linked data then one would
> like to have a semantic sitemap exposed,
As said - I understand BestBuy is using the main sitemap to bundle the
individual semantic sitemaps. Note that they are dealing with 450,000
documents. A single sitemap file would be pretty large.
> which includes other details
> e.g. a sparql endpoint some information on the datasets etc. [1]
>
>
There is, to my knowledge, no SPARQL endpoint offered by BestBuy.com,
but you can soon simply use the Linked Open Commerce dataspace at
http://loc.openlinksw.com/sparql
This will contain a current copy of the bestbuy graphs.
> has this been considered and decided against?
As far as I know, the combination of a sitemap and 23 semantic sitemaps
was a pragmatic decision. If it causes major problems, Jay Myers from
BestBuy will for sure be open to improvements for suggestions.
> should we just live with
> it and fit sindice to do some guesswork and process those instead? (i
> am not necessarely against this last solution really.. )
>
You simply have to fetch and un-gzip the 23 semantic sitemaps at
http://products.semweb.bestbuy.com/sitemap<n>.xml.gz
with <n> being a number from 1 to 23.
Note that
http://products.semweb.bestbuy.com/sitemap5.xml.gz
seems to have a syntactical problem (fix is already requested).
> In other words are you suggesting the use of semantic sitemaps
We usually recommend using semantic sitemaps. But actually I think that
a consolidated dataspace like the LOC will become more important in the
future, because it creates to much overhead for each agent and
application to crawl and consolidate the whole Web of Linked Data on
his/her own.
> or
> should we just come to term to this? The disavantage is that linked
> data browser that wants to use an index to find information will be
> able to do so less reliably (hope that our guesswork works)
>
As said - I understand (without a thorough analyis, though), that
BestBuy's usage of a single sitemap and multiple semantic sitemaps is okay.
> Giovanni
>
> [1] http://sw.deri.org/2007/07/sitemapextension/
>
> On Mon, Aug 31, 2009 at 8:08 PM, Martin Hepp
> (UniBW)<martin.hepp@ebusiness-unibw.org> wrote:
>
>> Dear all:
>>
>> BestBuy.com has just started to serve a complete RDF/XML dump of their
>> products and price information to the Web of Linked Data, using the
>> GoodRelations vocabulary for e-commerce. The data dump is updated on a
>> daily basis and contains detailed descriptions for roughly 450,000
>> individual items. With about 60 triples per item, this totals to about
>> 27 million RDF triples.
>>
>> Semantic Sitemap: http://products.semweb.bestbuy.com/sitemap.xml
>>
>> Examples:
>> a) Software:
>> http://products.semweb.bestbuy.com/products/8182593/semanticweb.rdf
>>
>> b) "Hardgoods":
>> http://products.semweb.bestbuy.com/products/8794691/semanticweb.rdf
>>
>> c) Movies:
>> http://products.semweb.bestbuy.com/products/7590289/semanticweb.rdf
>>
>> d) Games:
>> http://products.semweb.bestbuy.com/products/9223752/semanticweb.rdf
>>
>> Other than many existing large RDF transcripts, the data very dynamic,
>> holding the daily prices for all items.
>> According to Wikipedia, BestBuy.com is the largest specialty retailer of
>> consumer electronics in the United States accounting for 19% of the market.
>>
>> It is likely the first Fortune 500 company to start publishing offer
>> details on the Web of Linked Data.
>>
>> Congratulations to Jay Myers from BestBuy.com for this excellent
>> contribution, and a big thanks to Andreas Radinger and Alex Stolz for
>> their support,
>>
>> Best wishes
>>
>> Martin Hepp
>>
>> --
>> --------------------------------------------------------------
>> 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
>> twitter: mfhepp
>>
>> Check out GoodRelations for E-Commerce on the Web of Linked Data!
>> =================================================================
>>
>> Webcast:
>> http://www.heppnetz.de/projects/goodrelations/webcast/
>>
>> Recipe for Yahoo SearcMonkey:
>> http://tr.im/rAbN
>>
>> Talk at the Semantic Technology Conference 2009:
>> "Semantic Web-based E-Commerce: The GoodRelations Ontology"
>> http://tinyurl.com/semtech-hepp
>>
>> Overview article on Semantic Universe:
>> http://tinyurl.com/goodrelations-universe
>>
>> Project page:
>> http://purl.org/goodrelations/
>>
>> Resources for developers:
>> http://www.ebusiness-unibw.org/wiki/GoodRelations
>>
>> Tutorial materials:
>> CEC'09 2009 Tutorial: The Web of Data for E-Commerce: A Hands-on
>> Introduction to the GoodRelations Ontology, RDFa, and Yahoo! SearchMonkey
>> http://tr.im/grcec09
>>
>>
>
>
>
--
--------------------------------------------------------------
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
twitter: mfhepp
Check out GoodRelations for E-Commerce on the Web of Linked Data!
=================================================================
Webcast:
http://www.heppnetz.de/projects/goodrelations/webcast/
Recipe for Yahoo SearcMonkey:
http://tr.im/rAbN
Talk at the Semantic Technology Conference 2009:
"Semantic Web-based E-Commerce: The GoodRelations Ontology"
http://tinyurl.com/semtech-hepp
Overview article on Semantic Universe:
http://tinyurl.com/goodrelations-universe
Project page:
http://purl.org/goodrelations/
Resources for developers:
http://www.ebusiness-unibw.org/wiki/GoodRelations
Tutorial materials:
CEC'09 2009 Tutorial: The Web of Data for E-Commerce: A Hands-on Introduction to the GoodRelations Ontology, RDFa, and Yahoo! SearchMonkey
http://tr.im/grcec09
Received on Tuesday, 1 September 2009 13:14:35 UTC