This is the big news that we've been saving for today - JetBrains MPS 3.0 is ready for you to grab and use. Our development effort has brought serious improvements to your favorite language workbench. The major new features and capabilities include: Tight interoperability between Java and BaseLanguage in IntelliJ IDEA, allowing you to safely navigate and refactor your code while ignoring the language boundaries. Multiple editors per concept to fully leverage the projectional nature of the MPS editor Smoothened the editor experience for BaseLanguage, giving you almost text-like feel in

Listening to your feedback and fixing the bugs you reported (check out the release notes) got us to the second release candidate, which you can now download and experiment with. Develop with pleasure! -JetBrains MPS Team

Listening to your numerous requests we managed to prepare an overview document describing how scopes work in MPS 3.0 and how you should use them. If scoping is something that has been puzzling you, please check out the Scope doc. Develop with pleasure! -JetBrains MPS Team

We prepared some guidelines for those who'd like to try the new Open API of MPS 3.0 and experiment with custom persistence. You might have already tried the xmlPersistence sample project, which was bundled with the first release candidate. Now we added a step-by-step cookbook that uses the xmlPersistence sample project to show how custom persistence should be implemented. If this is something you're into, check it out. Develop with pleasure! -JetBrains MPS Team

As we're getting very close to the final 3.0 release, the first release candidate has been prepared for you today. Thank you all for your feedback that helped us tune the features and fix the bugs in our earlier EAP releases (check out the release notes). Please, get MPS 3.0 rc1 and help us give MPS 3.0 some last-minute polish. The final 3.0 release is now just a few short days away. Develop with pleasure! -JetBrains MPS Team

Debugging typically helps you gain insight in what's happening down in the code. Debugging the type-system is a special challenge, though. The MPS type-system engine performs type calculations on the type-system rules trying to match types to the language elements used in the code. You, as a language designer, are interested in seeing the high-level picture of what's happening, what type is assigned to what element, when and why. The MPS Type-System Trace tool, that some of you may already know, gives you exactly that. We've prepared a Typesystem Debugging document describing the ways you can

Have you tried one of the most prominent features of MPS 3.0 - multiple editor projections? Developers can now switch between alternative notations and so always pick the one that fits best the task at hands. This is really an exciting addition to the MPS feature set. To help you start experimenting, we bundled a new multipleProjections sample project with MPS 3.0 EAP releases. This sample comes with a simplified state-machine definition language that offers two notations - a structural and a tabular one. Exploring the project will teach you how multiple notations can be implemented. We've al

Another round of fixing and polishing to MPS 3.0 has just been finished and packaged into an EAP release. Get the most recent EAP release from the download page so you may give it a serious try. Check out the list of all fixed issues in this release. The final release is just round the corner. We also bundled several new sample projects that let you play with multiple editor projections, type-system or mathematical notations. They might be a good way for you to try 3.0 out. You can read more on the bundled sample projects in the documentation. Develop with pleasure! -JetBrains MPS Team

While playing with the 3.0 EAP releases, you may consider checking out the updated MPS generator tutorial. It has undergone a major rewrite to accommodate for all the recent changes to the MPS generator and to better serve the purpose of teaching the various code generation techniques that MPS offers. The bundled generator_demo sample project, which you find in the MPS 3.0 EAP distro, has been updated, too. Develop with pleasure! -JetBrains MPS Team

If you like living on the edge, we've got a new EAP release ready for you to try out. In addition to the features of the previous EAP release, we've enabled automated migrations that will convert your 2.5 projects to 3.0. Get the release from the usual place and don't forget to let us know how things worked. Help us shape the next release! Develop with pleasure! -JetBrains MPS Team

This is exciting news for all the MPS fans out there. You can now get the EAP builds of MPS 3.0 and start playing with what we've build over the last year. It took a while, and we hope it was worth waiting for. Here's a list of the most notable additions and improvements that you could benefit from right away: Multiple editors per concept Default editor for concept Overriding editor components BaseLanguage structure changes and editor usability improvements Custom persistence API and XML persistence New UI for model/module properties Structure language changes VersionControl support U

Today we've got another video giving you a taste of what's being prepared for the upcoming 3.0 release - multiple editor projections. This is truly unleashing the power of projectional editing. The new support for multiple projections will give the language designers the power to define alternative editors and so prepare different ways for the users to interact with their code. These editors can be created for new as well as existing languages. The language users will then be able to choose the most appropriate editor for the job and switch between the alternative editors whenever needed.