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Defining Models Using Multiple Namespaces

Concerto models in one namespace can import types defined in other namespaces.

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const { ModelManager, Concerto } = require('@accordproject/concerto-core');

try {
// create the model manager, used to manage a consistent set of
// related models
const mm = new ModelManager();

// add a CTO file (as a string) to the model manager
// note that this model file imports types from the
// person@1.0.0 namespace, so we pass 'true' as the third argument
// to disable consistency validation as this file (on its own)
// is invalid.
mm.addCTOModel(`namespace cars@1.0.0

import person@1.0.0.{Person}

concept Driver extends Person {
o String favoriteColor

concept Car identified by vin
o String vin
o Person owner
}`, 'car.cto', true)

// next we load the person@1.0.0 namespace
mm.addCTOModel(`namespace person@1.0.0

abstract concept Person
o String firstName
o String lastName
}`, 'person.cto', true);

// now we call validateModelFiles to verify the
// consistency of the model manager, which will check that
// all imports resolve

// we can now retrieve a type from the model manager
const carType = mm.getType('cars@1.0.0.Car');
catch (err) {