W3C home > Mailing lists > Public > semantic-web@w3.org > January 2012

Re: status and problems on sematicweb.org

From: Markus Krötzsch <markus.kroetzsch@cs.ox.ac.uk>
Date: Fri, 13 Jan 2012 08:57:58 +0000
Message-ID: <4F0FF216.2040407@cs.ox.ac.uk>
To: Bernard Vatant <bernard.vatant@mondeca.com>
CC: Yury Katkov <katkov.juriy@gmail.com>, Semantic Web <semantic-web@w3.org>
On 12/01/12 18:39, Bernard Vatant wrote:
> Hi all
> A related issue is that under semanticweb.org <http://semanticweb.org>
> domain or subdomains are living several vocabularies (ontologies), some
> of them are used in the linked data space, either by published data sets
> or other vocabularies relying on them.

This is only weakly related to this wiki site discussion but should be 
easy to solve anyway. Short answers:

* Subdomains of semanticweb.org are managed independently and (mainly) 
on different servers run by different people. The responsibility is with 
the people who asked for the subdomain. Stefan Decker is managing the 
domain registration and should know who is responsible in cases where it 
is not clear from the web page.

* Content of earlier versions of semanticweb.org has not been migrated 
in the last relaunch of the site a few years ago. As long as it is just 
static HTML content that does not conflict with new content (i.e., if 
there is nothing else under that URL now), it would be possible to put 
it back into its place. To do this, please send me an email with the 
archived HTML content and let me know where to put it. I do not have 
access to any old versions of the site, so I cannot help in finding the 
old content.



> But their status is variable. Examples :
> http://data.semanticweb.org/ns/swc/ontology is alive and well so far
> and re-used e.g., by http://online-presence.net/opo/ns
> http://proton.semanticweb.org/2005/04/protons# is alive and well so far
> and re-used e.g., by http://www.bbc.co.uk/ontologies/sport/
> But
> http://www.semanticweb.org/ontologies/2009/2/HumanEmotions.owl is 404,
> although http://kdo.render-project.eu/kdo declares that it imports it
> Actually http://semanticweb.org/ontologies/ itself is 404
> http://knowledgeweb.semanticweb.org/semanticportal/OWL/Documentation_Ontology.owl
> is 404
> although http://lsdis.cs.uga.edu/projects/semdis/opus# declares many
> mappings to it
> http://data.semanticweb.org/ns/misc is 404
> although it is used by http://data.semanticweb.org/ns/swc/ontology
> And that's only what I can quickly discover using the results provided
> by the LOV bot which explores the Linked Open Vocabularies space.
> What is the bottom line of this? Data and vocabularies publishers take
> for granted that published vocabularies can be re-used at will and rely
> on them. But when a re-used vocabulary goes off-line, not only we have
> 404 in the linked data web, but semantics of dependent vocabularies is
> affected.
> semanticweb.org <http://semanticweb.org> is just an example.
> Unfortunately it's not the only one. It seems that vocabulary publishers
> are often not aware of their long-term responsibility. We have in the
> LOV project even had answers from some people mentioned as vocabulary
> creators who were not even aware that their vocabulary was actually
> still used ...
> But given its singular place in the semantic web space, one could think
> that semanticweb.org <http://semanticweb.org> should show off good
> practices ...
> Best
> Bernard
> 2012/1/12 Markus Krötzsch <markus.kroetzsch@cs.ox.ac.uk
> <mailto:markus.kroetzsch@cs.ox.ac.uk>>
>     Hi Yuri,
>     let us take this to one mailing list semantic-web@w3.org
>     <mailto:semantic-web@w3.org>, as this is the list that is most
>     involved (please drop the others when you reply).
>     As the technical maintainer of the site, I largely agree with your
>     assessment. In spite of the very high visibility of the site (and
>     perceived authority), the active editing community is not big. This
>     is a problem especially given the significant and continued spam
>     attacks that the site is under due to its high visibility (I just
>     recently changed the captcha system and rolled back thousands of
>     edits, yet it seems they are already breaking through again, though
>     in smaller numbers).
>     I do not want to blame anybody for the state of affairs: most of us
>     do not have the time to contribute significant content to such
>     sites. However, given the extraordinary visibility of the site, we
>     should all perceive this as a major problem (to the extent that we
>     attach our work to the label "semantic web" in any way).
>     So what can be done?
>     (1) Freeze the wiki. A weaker version of this is: allow users only
>     to edit after they were manually added to a group of trusted users
>     (all humans welcome). This would require somebody to manage these
>     permissions but would allow existing projects/communities to
>     continue to use the site.
>     (2) Re-enforce spam protection on the wiki. Maybe this could be
>     done, but the site is targeted pretty heavily. Standard captchas
>     like ReCaptcha are thus getting broken (spammers do have an
>     effective infrastructure for this), but maybe non-standard captchas
>     could work better. This is a task for the technical maintainers
>     (i.e., me and the folks at AIFB Karlsruhe where the site is hosted).
>     (3) Clean the wiki. Whether frozen or not, there is a lot of spam
>     already. Something needs to be done to get rid of it. This requires
>     (easy but tedious) manual effort. Some stakeholders need to be found
>     to provide basic workforce (e.g., by hiring a student to help with
>     spam deletion).
>     (4) Restore the wiki. Update the main pages (about technologies and
>     active projects) to reflect a current and/or timeless state that we
>     would like new readers to see. This again needs somebody to push it,
>     and for writing pages about topics like SPARQL one would need some
>     expertise. This is a challenge for the community.
>     I am willing to invest /some/ time here to help with the above, but
>     (3) and (4) requires support from more people. On the other hand,
>     there are probably hardly more than 20 or 30 *essential* content
>     pages that we are talking about here, plus many pages about projects
>     and people that one should ask the stakeholders to review. So one
>     might be able to make this into a shining entry point to the
>     semantic web in a week of work ... together with (1) and (2) above,
>     the invested work would remain valuable for a long time.
>     Cheers
>     Markus
>     On 12/01/12 10:43, Yury Katkov wrote:
>         Hi everyone!
>         What is the current status of the semanticweb.org
>         <http://semanticweb.org>
>         <http://semanticweb.org> website? It used to be the main wiki
>         about the
>         semantic web, it has a lot of cool and useful information about
>         everything. But now it seems abandoned. I mean, there are about
>         30 real
>         writers who update the information about their projects an write
>         articles, but they do something like 30% of changes. The other
>         70% is spam!
>         Are there guys who support the website?
>         Who manages the community, are there any plans of creating
>         projects and
>         articles about SW? Is there community at all?
>         In my opinion if this great website suppose to be alive the
>         first goal
>         is to find volunteers who'll help administrator to combat spam (with
>         bots, extensions and editing policies) and support the new
>         activities
>         and projets on the wiki. (I'm ready to be one of them).
>         If this wiki lived only in the past when it was a big hype around
>         Semantic Web topics and now without a big funding nobody wants
>         to use it
>         - wouldn't it better to be frozen?
>         I appreciate and admire people who started up the wiki. Please,
>         don't
>         let it be the rotting memorial to the past of the Semantic Web.
>         -----
>         Sincerely yours,
>         Yury Katkov, WikiVote llc
>     --
>     Dr. Markus Kroetzsch
>     Department of Computer Science, University of Oxford
>     Room 306, Parks Road, OX1 3QD Oxford, United Kingdom
>     +44 (0)1865 283529 <tel:%2B44%20%280%291865%20283529>
>     http://korrekt.org/
> --
> *Bernard Vatant
> *
> Vocabularies & Data Engineering
> Tel : + 33 (0)9 71 48 84 59
> Skype : bernard.vatant
> Linked Open Vocabularies <http://labs.mondeca.com/dataset/lov>
> --------------------------------------------------------
> *Mondeca * ** **
> 3 cité Nollez 75018 Paris, France
> www.mondeca.com <http://www.mondeca.com/>
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Dr. Markus Kroetzsch
Department of Computer Science, University of Oxford
Room 306, Parks Road, OX1 3QD Oxford, United Kingdom
+44 (0)1865 283529               http://korrekt.org/
Received on Friday, 13 January 2012 08:58:38 UTC

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