Re: UML class input to (eventual) JSON-LD output

Thank you for your quick response Cory. I don’t mind doing the translation by hand to start with, I just need some guidance on how to do things like take a UML class and an attribute (two things) and express it as a triple (3 things). Or when to use RDFS vocab vs. RDF vocab and how are they expressed as JSON-LD.

To your questions on code, the code will be a web application that provides farm-related information that I hope to integrate with other applications that provide farm-related information in order to support decision making by agronomists. The language will likely be Python or Java.


From: Cory Casanave <>
Date: Tuesday, May 8, 2018 at 7:48 PM
To: Julie Bielski <>, "" <>
Subject: RE: UML class input to (eventual) JSON-LD output

We have done mappings of UML (and other modeling/ontology languages) to/from RDF and application code in various languages for about 15 years. It may seem a bit like a black art, but it is very doable. We are actually preparing some open source that does just that but it isn’t out yet – we do use it in projects.
Note that Jason-LD –IS— RDF, it is an RDF syntax. Multiple tools will produce RDF/OWL (and other things) from UML, for example:

The other question is your “code”, what code to do what in what language? The open source I described will produce a Java API for the application based on the ontology as modeled in UML or OWL, it uses a specific profile and metamodel: The focus of this is information federation, translation and analytics.

I hope this helps!

-Cory Casanave

From: Julie Bielski <>
Sent: Tuesday, May 8, 2018 3:53 PM
Subject: UML class input to (eventual) JSON-LD output


Does anyone here have experience with starting with a UML class diagram of an application domain and getting to the point where your code
can output instances of the various classes, their attributes, and relationships to instances of other classes via JSON-LD? From the reading I’ve done,
seems like I’d first convert the UML class diagram to RDFS and then to RDF, which could be serialized as JSON-LD? Seems like this would be a
common activity in the move from siloed data interchange to linked data.




Received on Wednesday, 9 May 2018 14:07:13 UTC