Introduction
This plugins allows to apply a SPARQL request on: 1. a set of RDF local files, i.e. on your computer. This is done by using the Corese SPARQL engine; 2. a SPARQL SOAP or REST end-point. It provides also first draft versions for two new functionalities: - statistics on the types present in the rdf obtained (if the rdf:type relations are provided in the construct request). - a filter on the type of the nodes.
Plugin Owner's Notes
Some examples are available: - the humans example use local files and the Corese engine. To make it run, choose "humans" in the bottom drop-list, the click on the "Load" button, then Start. - the DBPedia-Movies example access to dbpedia in order to depict the relationships between the actors, directors and movies. To make it run, choose "DBPedia-Movies" in the bottom drop-list, the click on the "Load" button, then Start.
27 May 2011 at 11:07 am | Permalink
Some documentation would be nice. I’ve loaded the plugin – now what? How do I open and visualize RDF files?
8 June 2011 at 2:12 pm | Permalink
Here is a screencast http://bit.ly/mQdnZd
28 June 2011 at 7:21 pm | Permalink
I would love to try this plugin out but all I am getting is Java exceptions at the moment (version 1.0.5 on Gephi0.8).
I tried both adding a local RDF file or pointing at a SPARQL endpoint.
Also… the Semantic Web Import panel is fully visible only when the window is completely expanded (it doesn’t adjust to the size of the viewport) and the Save As button doesn’t do anything (for configurations).
29 June 2011 at 9:29 am | Permalink
Hello Laurent,
Thank you for your interest in the plugin.
- Could you be more specific on the exceptions you encountered, and how they were obtained ? Are they fatal exceptions (i.e. causing Gephi to crash) ?
- Trying to use the “Edit Parameters” with the CoreseDriver cause an exception to be thrown, sonce there is currently no configuration panel associated with this driver. It is a known bug.
- Did you use the preset examples, as is described above ? More specificatlly, the DBMovies and humans should be working, thus allowing to build your own examples by changing the parameters.
- Arguably, the GUI has to be improved a lot, which is one part of my current tasks. Currently, I would suggest you to drag the SemanticWebImport off the Gephi GUI (i.e., the plugin is in an another window). It should make the whole content more readable.
- the “save as” button bug is known.
- the plugin should be considered as in an alpha stage: it should allow you to import RDF data, but it still lacks user-friendliness.
Best regards,
Erwan
3 August 2011 at 5:08 am | Permalink
Hi Erwan:
Trying to get this plugin to extract from a Stardog sparql endpoint. Stardog (currently in semi-private beta) is tossing a 405 when Gephi POSTs the query to the endpoint. My suspicion is Stardog would prefer a GET, but I haven’t been able to track down the source code for the SemanticWebImport plugin.
Can you point me at the source code for the plugin? Thank you very much for building this.
Jason
19 October 2011 at 8:22 pm | Permalink
Hello and thanks for the nice plugin.
I have a problem with gephi, since i can not visualize the whole window, since it goes way out of the working space. see what i mean here: http://imageshack.us/photo/my-images/33/ishot2s.jpg/
21 November 2011 at 4:51 pm | Permalink
I’ve tried using the plugin against an ARC endpoint and couldn’t get a result back. Does the module only work against Virtuoso? The errors I got suggest this:
error when obtaining the nodes and edges:[Virtuoso SOAP server] SR171: Transaction timed out
javax.xml.ws.soap.SOAPFaultException: [Virtuoso SOAP server] SR171: Transaction timed out
Otherwise a great tool! Thanks for the effort!
22 December 2011 at 4:52 pm | Permalink
I tried to access a Virtuoso store over REST or SOAP.
If I use REST, I get results back (I can write them into a file), but they do not get loaded. I think it’s a problem of the returned format. Which one is expected?
If i use SOAP, it completely ignores the given url and queries DBPedia instead.
Can you help me?
17 January 2012 at 9:32 pm | Permalink
What is the most current version number of your plugin
31 March 2012 at 5:32 pm | Permalink
Clicking Window->SemanticWebImport in top menu of Gephi have no effect for me. There is no window appeared
Gephi 0.8.1-beta, Windows XP.