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Building a mobile app for ISWC2010

November 9th, 2010

One of the things I find annoying while attending conferences is the huge amount of papers we receive: Talks, maps, “metadata” about the conference in general. So, for ISWC2010, my solution was to create a mobile application where people attending a conference could retrieve the information they wanted.

The first question you may ask when you create a mobile app is which niche you want to cover: The mobile ecosystem contains a wide range of devices, each of them with different capabilities, features, etc. This implies that a developer should choose which platforms to support and which feature he or she can use.

With ISWC in mind, my impression was that most of the attendees would use a smartphone, in particular iPhones or Android. Since I wanted to cover both platforms, I decided not to create native applications (for now).

I based my work on Sencha Touch which is a nice library that uses CSS3, HTML5 and Javascript. The app works fine in iPhone, iPod, iPad, Android devices, as well as Chrome and Safari browsers.

In this app it is possible to obtain and navigate through information about authors, papers, workshops (sadly, I could not obtain the data about workshop papers on time), scheduling, rooms and sessions. The data is obtained from a SPARQL endpoint containing the ISWC 2010 metadata. Each action implies a SPARQL query end the results are retrieved as a JSON object. I also obtained picture of authors from Arnetminer.


Finally I added a twitter feed with all the relevant hahstags (#iswc, #iswc2010, #cold2010, #seres2010, #c3lsw2010, etc.), so you can read what people is tweeting about the latest events (you shouldn’t have problems with firewalls, etc).
I encourage you to go to http://iswc.mobi and try ISWC Mobile. Of course, comments suggestions (and bug reports!) are always welcome.

Alvaro Graves

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Even more things to do with real-time conference data

November 9th, 2010

The widget I introduced in my last post is a specific application of SPARQL-based views over ISWC SemWeb Dog Food data and streaming Twitter data.  However, many other applications are possible, such as dynamic visualisations.  The following are a few examples of raw SPARQL queries executed against the conference triple store.  The first three are the queries currently provided with the widget demo, while the other two focus on data about people.  Tweak the queries to create your own live views of the conference data.

The URL of the AllegroGraph SPARQL endpoint is: http://flux.franz.com/catalogs/demos/repositories/iswc2010.  It supports XML and JSON results through content negotiation.

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Real-time Twitter filters for ISWC

November 8th, 2010

Real-time social networking services such as Twitter provide compelling use cases for Semantic Web technologies.  Last summer at SemTech, I gave a talk with examples of real-time semantic Twitter feeds powered by SPARQL and Twitter Annotations. While Annotations have not yet been released, they’re not the only way to add SemWeb-friendly structure to social data. The International Semantic Web Conference is a case in point. A reasonable combination of the ISWC 2010 Conference Corpus data assembled by Jie Bao and others, tweet metadata such as author and timestamp, and embedded nanosyntax (that is, hashtags), provide enough structure for useful semantic filtering. To illustrate, I present a general-purpose Web widget which grabs these filtered streams from a generic SPARQL endpoint. Of course, the endpoint needs to expose microblog data modeled in SIOC and FOAF. When applied to the ISWC data, the widget provides real-time views of Twitter conversations which make good use of the background knowledge we have about the conference. So now,

Check out the demo!

SPARQL-based Twitter widget


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15 (and counting) Ways to Explore ISWC 2010 Data

November 8th, 2010

This year at ISWC, when we worked on the metadata, we have a Data Consuming task force to develop tools that can browse/visualize the data many different ways, e.g., faceted browser, filter browser and mobile browser.

As soon as we have the basic dataset published, we immediately get feedback from people on off-the-shelf tools that can work with the data. The list is quickly growing. I collected the screen shots of some working instances (including tools the metadata committee has built) in a slides. I have no doubt that the number “15″ will be changed when the main conference begins …. in 2.5 hours! So expect some updates very quick.

What strikes me is that the number and diversity of data browsers currently available, and many of them are clearly reaching the level of maturity for non-expert users to explore. That was not the case even one year ago. So much has been changed for the Semantic Web in 2010!

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Quick Update on ISWC Twitter Data (1)

November 8th, 2010

At ISWC 2010, there are several on-going efforts to leverage Twitter data. Some ones that I’m aware of are:

Joshua Shinavier has helped to build a triple store (powered by AllegroGraph) that contains tweets related to the conference, along with basic ISWC metadata. Here is an example of SPARQLing with the triple store (details about tweets with tag #iswc2010 and #iswc). More examples and guide on how to use the triple store will be out soon.

URL: http://flux.franz.com/catalogs/demos/repositories/iswc2010#query

Marian Dörk helped us to visualize tweets at ISWC. You can see the relative traffic by time, the distribution of buzz words at the conference, and who is twittering about what. Marian is looking into interviewing our attendees for the tool – if you have comment, let him (mdoerk@ucalgary.ca) or me know (baojie@cs.rpi.edu)

URL: http://ilab51.cpsc.ucalgary.ca/iswc2010

To be continued.

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