I knew the name was familiar, this work led to Intentional Software (the company) which made a language workbench and kept promising interesting things about 20

I knew the name was familiar, this work led to Intentional Software (the company) which made a language workbench and kept promising interesting things about 20 years ago and nothing seemed to come of it. JetBrains put out MPS which is based on the same idea. https://martinfowler.com/articles/languageWorkbench.html https://martinfowler.com/articles/languageWorkbench.html