DMN datatype from json schema

[Marco Iannelli]

Dear All,

I have my datamodel define as json schema in several files;

Is there any functionality available to import those files as datatype in dmn?

from DMN 1.4 (Chapter 7.3.3 ItemDefinition metamodel) specification the following is mentioned:

The inputs and output of decisions, business knowledge models, and decision services, and the output of input data (all DRGElements) are data items whose value, at the logic level, is assigned to variables or represented by expressions.

... An important characteristic of data items in decision models is their structure. DMN does not require a particular format for this data structure, but it does designate a subset of FEEL as its default. ...

The default type language for all elements can be specified in the Definitions element using the typeLanguage attribute. For example, a typeLanguage value of http://www.w3.org/2001/XMLSchema” indicates that the data structures used by elements within that Definitions are in the form of XML Schema types. If unspecified, the default is FEEL.

thank you for your input

best regards

Marco

[Rhett S]

Hey Marco, there is no OOTB tool to convert data models in JSON to DMN-XML that I know of. 

However, it is possible to programmatically convert from JSON <--> XML in a deterministic manner. In java for instance, de/serializing from JSON to XML is trivial using annotations- or other ways- your preference.

If i remember correctly, the only thing that tripped up easy-peasy-conversion was the colons in the tags. 

Rhett

[Marco Iannelli]

Hi Rhett,

thank you for your answer. once; once i have the xml, what would be the next steps? 

BR

Marco

[Gabriele Cardosi]

Hi Marco,
I read your email some days ago, and I found the use-case extremely interesting.
I talked with the guys working at tooling, and they also see it would be a very useful feature.
For the moment being, this is the ticket we created:
https://github.com/apache/incubator-kie-issues/issues/1050
(unfortunately, I can not provide any estimation).

About your original question, in the past this is the approach we followed to address similar issue (not exactly the same):
https://github.com/apache/incubator-kie-tools/tree/3daeaf23be1fa78bdaaf0869c8bf387ed600726e/packages/stunner-editors/drools-wb-screens/drools-wb-scenario-simulation-editor/drools-wb-scenario-simulation-editor-kogito-marshaller

Mind you, probably you can't follow exactly the same, and probably you would need to do that purely in Java; but it is just an example

Best 

Gabriele

[Rhett S]

Hey Marco, there is no OOTB tool to convert data models in JSON to DMN-XML that I know of. 

However, it is possible to programmatically convert from JSON <--> XML in a deterministic manner. In java for instance, de/serializing from JSON to XML is trivial using annotations. I've done it in hackathon. 

If i remember correctly, the only thing that tripped up easy-peasy-conversion was the colons in the tags. 

Rhett

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[Marco Iannelli]

Hi Rhett,

Thanks for your answer. Once I have the xml from the json, what i need to do?

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[Gabriele Cardosi]

Hi Marco,
I read your email some days ago, and I found the use-case extremely interesting.
I talked with the guys working at tooling, and they also see it would be a very useful feature.
For the moment being, this is the ticket we created:
https://github.com/apache/incubator-kie-issues/issues/1050
(unfortunately, I can not provide any estimation).

About your original question, in the past this is the approach we followed to address similar issue (not exactly the same):
https://github.com/apache/incubator-kie-tools/tree/3daeaf23be1fa78bdaaf0869c8bf387ed600726e/packages/stunner-editors/drools-wb-screens/drools-wb-scenario-simulation-editor/drools-wb-scenario-simulation-editor-kogito-marshaller

Mind you, probably you can't follow exactly the same, and probably you would need to do that purely in Java; but it is just an example

Best 

Gabriele