If you want to use data models coming from several subjects you will have to merge (somehow) their @contexts.
In this first step, we offer you a service that allows you to choose what subjects you need to merge and to generate the @context.
See the instructions on the page. Now in Main menu -> @context -> Generate a local context
It also provides you with the conflicts in the attributes’ names, in order to let you solve them manually.
In the next step, possibly next week, you will have another service that will allow you to choose what reference ontologies and vocabularies you want to use and replace the Smart data models IRIs with those coming from these external sources.
Slack channel
Validate a payload with a data model