Wednesday, September 17, 2014

Release 2.0.47

Hello BibSonomy folks,

today marks the release of BibSonomy 2.0.47. We integrated a new publication scraper for the WorldScience Journal. We also fixed the Arxiv scraper, which should now be working properly again. As for the last two releases, we worked hard on the new layout (also see our previous blog post for this). The layout is now in open beta. As a small change, we fixed a small issue with the maximum number of posts you can view at one time.

Happy tagging

Friday, September 12, 2014

Be a part of the BibSonomy 3 Beta Program

As announced a few weeks ago, we are working on a new front-end for BibSonomy. The new user interface is also the main component of the release of BibSonomy 3.

Be a part of the BibSonomy 3 Beta Program

BibSonomy 3 will be available this fall. We’re very interested in the opinion of our users and therefore we would like to invite you to try BibSonomy 3 now. The Beta Program lets you take part in shaping it by test-driving the pre-release version and letting us know what you think.

To join the BibSonomy 3 Beta Programm, just sign-in to BibSonomy and go to, read the user hints and press the button at the bottom of that page. When you come across an issue, you can report it in our bug tracker. If you would like to give us more general feedback, you can leave a comment for this post.

BibSonomy 3 is currently in beta status and still in development, which means some features and services might not always work as expected. At any time, it is possible to switch back to the BibSonomy 2 front-end on

We are grateful for your feedback! 

So long, keep tagging,

Your BibSonomy Crew

Tuesday, September 9, 2014

Feature of the Week: BibSonomy and Memento

Over the past weeks, the Memento team has worked with colleagues at BibSonomy to enable Memento-related functionality for BibSonomy bookmarks. The Memento "Time Travel for the Web" protocol specified in RFC 7089 extends the HTTP protocol with datetime negotiation, a variant of content negotiation. A Memento client requests an old version of a resource by expressing the resource's original URI along with the datetime of the version it is interested in. A Memento server, such as a web archive, responds with an archived snapshot of the resource that is temporally closest to the datetime requested by the client. A Memento Aggregator simultaneously polls multiple web archives and returns the temporally closest snapshot available irrespective of the archive it resides in.

Two features that use Memento infrastructure were added for BibSonomy Bookmarks:
  • Bookmarked links are annotated with a data-versiondate attribute that conveys the datetime of bookmarking. This attribute, as well as the related data-versionurl, were first proposed in the Memento-related Missing Link document that explores annotating links with temporal information as a means to increase link robustness and to allow revisiting linked resources as they were seen by the creator of a link. Both attributes make use of an extensibility mechanism offered by HTML5 that allows the introduction of private data- attributes. The Memento extension for Chrome supports both attributes. For bookmarked links in BibSonomy, the extension presents a menu item Get at link date ..., which allows to look for archived snapshots of the bookmarked page from around the time it was bookmarked. This feature is demonstrated in the below image. At the left hand side, a user clicks the link to the website of the Raw visualization tool and receives the current version of the page in response. At the right hand side, a user right-clicks the same link in a Chrome browser that has the Memento extension installed. Since that link is annotated with the datetime of bookmarking - expressed as the attribute data-versiondate="2014-03-16T17:42:12+01:00" on the link - the Memento extension uses the provided date for web time travel and tries to find the archived snapshot of the Raw site closest to the date of bookmarking. It finds a snapshot dated March 7 2014 in the web archive that looks rather different than the current version.
  • The same functionality is available without the Memento extension for Chrome by clicking the little clock at the bottom of the bookmarked item. Doing so initiates a request by a Memento client at the end of BibSonomy that is targeted at the Memento Aggregator and that results in a redirect to a temporally appropriate Memento.

Both features are really neat and I would like to thank Robert Jäschke and his colleagues at BibSonomy for making this happen and Martin Klein at the Memento end for initiating the collaboration!

Herbert Van de Sompel, Los Alamos National Laboratory

Popular Posts