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for Smallworld™

MDT® is an IDE for development
of Smallworld applications.
It’s the fastest and smartest way
to deliver your Smallworld

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Magik code editing

code assist, templates, hyperlinks, validation

Integrated debugger

breakpoints, inspections, stepping through code

Fast and effective development

managing GIS sessions, console, code assist, command history

Multiplatform ability

working with Magik, Java, HTML, XML in one environment

Video Tutorials

A set of short Migration FAQ tutorials to help you in faster and more comfortable transfer from Emacs to MDT.

All crucial aspects are explained so you can easily migrate your sessions, sources and configurations.


SW5 Support Plug-in released!

2016-02-17 14:00

You are now able to download & install a first version of the SW5 Support Plug-in. This MDT extension adds full support for the Smallworld™ 5 technology. After installation, you will be able to create a new kind of runtimes and sessions (SW5 specific). All MDT features, such as Class Browser, Type Hierarchy, Magik Search and MDT Debugger, will be available for those sessions.

MDT 3.7 is available now!

2016-02-17 11:00

This release includes a few major changes:

  • Compatibility with Eclipse 4.5 (Mars)
  • New Quick Type Hierarchy view provided to the Magik Editor which allows quick lookup of the Exemplar and Method Hierarchy 
  • Support for loading patch list files to session
  • XML file editor
  • Improved Class Browser and Command Histories views

Read more about this version and its features in What’s new pages. For more detailed info refer to the List of changes.

New release: MDT Administrator Edition 1.0

2015-09-11 12:25

MDT Administrator Edition 1.0 is now available. This is a free-cost MDT version dedicated to the Smallworld 5 Administrators and available under 64-bit Windows and Linux system. It contains basic functionalities of MDT Professional Edition. The differences between these both products are presented here

You can download MDT Administrator Edition as a product or plug-in from the product website.

Magik on Java™ Plug-in 0.6.1 is available!

2015-06-12 15:25

New version of Magik on Java™ Plug-in has been adapted to Smallworld™ 5 Preview Release - Phase 9. Debugger’s stack frames filtering and dynamics visibility in Variables View have been fixed.


GE is pleased to see third party applications such as MDT that enable customers to customize applications on Smallworld. We will continue to closely support companies like ASTEC in support of our position as a leading provider of geospatial solutions.

Martin Ansell, General Manager Smallworld
GE Energy

MDT brings a modern environment to Magik development. The most effective aspect is the enormous increase in efficiency and productivity.

Jan Kiefer, Software Developer
NIS AG, Switzerland

MDT Magazine Issue 7

Magazine for Smallworld™ Magik Developers

  • Get ready to meet Magik on Java™ with the release of MDT PE 3.6
  • Further support for Magik on Java™ provided by MDT: debugger
  • We have expertise in Electric Office Web™!
  • Network Viewer™ and Network Viewer Plus™
  • Types of licenses available for MDT Professional Edition


MDT Newsletter