As far as I understand JetBrains MPS is a tool for creation of DSLs. The DSL created with this tool can be absolutely different: it may contain some 'new' operators to extend classic Java, for example, or even some new graphical symbol to account for such an extension.
What I want is to create a DSL to account for building workflow.
I have heard Jetbrains professionals have completed this task for YouTrack workflows. May be I can check that somewhere?
May be, there is a tutorial on creating 'visual' DSLs in MPS?
May be, there are some examples of this?