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gnowsis VS berlin hack

Some people are like magnets, they are built to meet sometime. That is also true for me, leobard, and the Berlin Semantic Web group around Chris Bizer, Richard Cyganiak and Anja Jentzsch. We had to meet sometime, unavoidable.

Berlin work extending Jena is always good documented and nice little tools. gnowsis is a bigger tool to integrate them and have them in a user interface. As tools need some visualisation, this hack today was to plug together gnowsis and NG4J and D2RQ. We want to join forces to make the Semantic Web fly and the Semantic Desktop a part of it. The combattants in today’s hack already gathered yesterday evening for a initial social drinking event at www.bergmann103.de that brought us closer together. Presents were exchanged and I gave flower necklaces to the natives.

natives with necklaces

The crew is:

  • Anja Jentzsch
  • Frank Wagner
  • Oliver Maresch
  • Ralf Jakob
  • Richard Cyganiak
  • me

Today we hacked some code together, and had some minor auccesses. I updated my foaf file.

The weather was great, Berlin charms me and Anja made many Pictures that we cannot hide from you.

Another great hack, that will be continued tomorrow, in the serices of gnowsis VS fenfire and gnowsis VS mindraider.

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subversion, subclipse, eclipse, https and certificates

I just had a funny bug i have to blog so that googlers can find it:

Eclipse 3.x using Subclipse on windows (which works fine)

Error:
Error validating location: “org.tigris.subversion.javahl.ClientException: RA layer request failed
svn: profind request failed on /repos/foafme

Server certificate cerification failed:
issuer is not trusted (https://foafme.opendfki.de)

keep location anyway?

Problem: our crew does not sign their certificates correctly (or) and the foafme.opendfki.de thing has a SSL certificate which is not correctly signed (or whatever)

I click on “add repository” and it says “the certificate is wrong” and i say “ok” but it still doesn’t work

Solution: Take another SVN client (commandline or tortoise svn) and connect to the server, press “OK” there when the certificate question comes. Then it works in eclipse also. problem solved.

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semantic photo stuff

some semantic photo projects I like:

www photos:
http://www.w3photo.org/

foaf codepiction (leo -> clinton)
http://swordfish.rdfweb.org/discovery/2001/08/codepict/
http://swordfish.rdfweb.org/discovery/2002/02/paths/

Masahide Kanzaki, the Semantic Web freak (and bass player):
http://kanzaki.com/works/2004/imgdsc/annot-gallery-e.rdf

and the annotation example by Masahide Kanzaki:
http://www.kanzaki.com/docs/sw/img-annotator.html

jip, the photo freak:
http://www.kwark.org/x/lsgfx

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gnowsis & mindraider

Some weeks ago I found mindraider, a visualiser and editor for Semantic Web data. I found that Martin Dvorak leads this project and asked him if he would be interested to connect it to gnowsis. He realized that this can help very much and started uriqa support for mindraider.

Uriqa support is always useful, so I wisely added a uriqa server to gnowsis that these things can fly better. After downloading and running mindraider & using the latest gnowsis, I was able to produce this:
gnowsis_mindraider

the “my files” folder in mindraider!

there are still some bugs, but in principle, it works.
Great.

Mindraider longer:
MindRaider is Semantic Web outliner. It aims to connect the tradition of outline editors with emerging technologies. MindRaider mission is to organize not only the content of your hard drive but also your cognitive base and social relationships in a way that enables quick navigation, concise representation and inferencing.