DeepaMehta News

Dec 10, 2013
DeepaMehta 4.1.3 released

DeepaMehta 4.1.3 brings a lot of useful GUI improvements and, for developers, a View Customization Framework. The Topicmap Panel provides increased means of expression, higher information density, and better usability. This new look&feel is realized as a plugin (Box Renderer), so if you don't like it, you can switch it off. The Detail Panel's information display is much more understandable and shows less redundancy. Developers can hook in drawing and event handling behavior in the default Topicmap Renderer whereupon 2 topic rendering flavors are supported: draw-on-Canvas and DOM-rendering.
Furthermore you can work with particularly complex data models ("aggregated composites") in the Webclient, and you can install/start/stop plugins without restart. For an extensive list of new features, changes, and fixes see the Release Notes.

Sep 01, 2013
DeepaMehta 4.1.1 released

While DeepaMehta 4.1.1 has not much to offer for the end user it brings crucial bug fixes and various enhancements in the Plugin Development Framework. Main features comprise Timestamps (not yet user perceivable) and a new Time API; better performance through exploitation of the browser cache; and Edit Conflict Detection for supporting collaborative work. Furthermore, a new Property API allows attaching arbitrary metadata to topics and associations. Numeric metadata is trie-indexed which allows for performant time- and and geo-based range queries. For a complete list of changes in DM 4.1.1 see the release notes.

Jun 26, 2013
2nd DeepaMehta Development Meeting

Time and location:

  • June 26, 2013
  • 4pm-8pm
  • TU Berlin, Hardenbergstraße 36a, Room ER 136

The target group and the meeting's agenda is the same as with the 1st DeepaMehta Development Meeting.

May 22, 2013
1st DeepaMehta Development Meeting

On May 22 the 1st DeepaMehta Development Meeting takes place at Technische Universität Berlin. The meeting is aimed at developers who are interested in developing with the DeepaMehta platform. Ideally, actual (plugin) development projects are established while the meeting.

Agenda:

  • Very short DeepaMehta introduction
  • What a plugin can do -- the DeepaMehta development framework
  • Working groups

Time and location:

  • May 22, 2013, 4pm-8pm
  • TU Berlin, Hardenbergstraße 36a, Room ER 136

Background: the educationZEN applications and web interfaces are developed on top of the DeepaMehta software platform. educationZEN is a blended learning project taking place at Technische Universität Berlin.
www.eduzen.tu-berlin.de

Mar 28, 2013
4th DeepaMehta Community Lounge

On March 28, 2013, 18:00h we hold the 4th DeepaMehta Community Lounge in Berlin. The DeepaMehta developers and users showcase their applications, usage scenarios, and ideas. And we will celebrate the advent of DeepaMehta 4.1, the first release with long term support.

The agenda known so far:

  • Presentation of new features in DM 4.0.14 and 4.1
  • Showcase of current DM4 projects and applications
  • Outlook, ideas, questions and answers
  • Celebration with drinks and music

The DeepaMehta lounge is OPEN: everybody can attend, everybody can contribute. Please check the Wiki page for details. There you can also add your own presentation or ideas.

Mar 11, 2013
DeepaMehta 4.1 released

On Mar 11, 2013 DeepaMehta 4.1 has been released. This is the most important DM4 release as it comes with a Data Sustainability Guarantee. For the first time, data you enter in DM4 is guaranteed to be transferred to all future DM4 releases automatically. So, after more than 18 months of development, the DM4 experimental stage is now over. You can begin productive DM4-based projects now.

Besides that, DM 4.1 brings minor improvements in usability and functionality. Crucial access control related bugs and other bugs are fixed. The plugin framework simplifies development by providing a DB-attached CompositeValue object. For a complete list of changes in DM 4.1 and further details see the Release Notes.

Jan 30, 2013
DeepaMehta 4.0.14 released

Main focus of DeepaMehta 4.0.14 is better Performance, in particular when there is a lot of content in the database. All the changes are behind the scenes. The user will perceive nothing but performance. The original problem background is described in a mailing list posting.

The storage layer of DeepaMehta 4.0.14 is completely rewritten. It features High-speed traversal: a Lucene index for associations significantly speeds up traversal. In particular, highly connected nodes ("supernodes") have no negative impact on traversal speed anymore. Compact architecture: the storage implementation is coded directly to the DeepaMehta Model API. The additional MehtaGraph bridging layer is dropped. Modular storage layer: 3rd-party developers are enabled to implement alternate DeepaMehta storage layers, based on arbitrary databases. A Storage layer implementation is deployed as an OSGi service.

For more changes and details see the Release Notes.

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