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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 1.1.0 released!

2016-08-08 11:25

New version of SW5 Support Plug-in has been adapted to Smallworld™ 5.1. Read more about this version in What’s new pages. For more detailed info refer to the List of Changes.

MDT 3.8 is now available!

2016-08-08 11:00

This release of MDT Professional Edition includes:

  • New auto typing features
  • Transmit state annotations
  • Support for quick fixing group of Magik problems
  • Improvements In 'Command Histories' view
  • Highlighting debug and deprecated Magik file elements
  • Overall improvements & optimizations
  • Many major & minor fixes

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

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.


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