Marten – Use PostgreSQL as a DocumentDB from .NET (modeled after RavenDB)

Quite like the idea, it's similar in concept to massive-js http://massive-js.readthedocs.io/en/latest/

Haven't used it in production yet but I have used RavenDB successfully for quite some time. Anyone aware of similar efforts to make PostgreSQL usable as a DocumentDB from other languages? It's an intriguing concept as it allows combining document+relational data models in a single database.