diff --git a/packages/concerto-cli/test/models/contract.json b/packages/concerto-cli/test/models/contract.json
index de3e083430..42b3d5a974 100644
--- a/packages/concerto-cli/test/models/contract.json
+++ b/packages/concerto-cli/test/models/contract.json
@@ -1 +1 @@
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\ No newline at end of file
+{"$class":"concerto.metamodel@1.0.0.Model","decorators":[],"namespace":"org.accordproject.cicero.contract","imports":[],"declarations":[{"$class":"concerto.metamodel@1.0.0.AssetDeclaration","name":"AccordContractState","isAbstract":false,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"stateId","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":809,"line":24,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":826,"line":25,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":757,"line":23,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":827,"line":25,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}},"identified":{"$class":"concerto.metamodel@1.0.0.IdentifiedBy","name":"stateId"}},{"$class":"concerto.metamodel@1.0.0.ParticipantDeclaration","name":"AccordParty","isAbstract":false,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"partyId","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":907,"line":29,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":924,"line":30,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":857,"line":28,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":925,"line":30,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}},"identified":{"$class":"concerto.metamodel@1.0.0.IdentifiedBy","name":"partyId"}},{"$class":"concerto.metamodel@1.0.0.AssetDeclaration","name":"AccordContract","isAbstract":true,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"contractId","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":1049,"line":34,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":1071,"line":35,"column":3,"$class":"concerto.metamodel@1.0.0.Position"}}},{"$class":"concerto.metamodel@1.0.0.RelationshipProperty","name":"parties","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"AccordParty"},"isArray":true,"isOptional":true,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":1071,"line":35,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":1106,"line":36,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":990,"line":33,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":1107,"line":36,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}},"identified":{"$class":"concerto.metamodel@1.0.0.IdentifiedBy","name":"contractId"}},{"$class":"concerto.metamodel@1.0.0.AssetDeclaration","name":"AccordClause","isAbstract":true,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"clauseId","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":1224,"line":40,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":1242,"line":41,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":1169,"line":39,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":1243,"line":41,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}},"identified":{"$class":"concerto.metamodel@1.0.0.IdentifiedBy","name":"clauseId"}}]}
diff --git a/packages/concerto-cli/test/models/contractResolved.json b/packages/concerto-cli/test/models/contractResolved.json
index d235632c0e..56c446750f 100644
--- a/packages/concerto-cli/test/models/contractResolved.json
+++ b/packages/concerto-cli/test/models/contractResolved.json
@@ -1 +1 @@
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\ No newline at end of file
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diff --git a/packages/concerto-cli/test/models/contractResolvedAll.json b/packages/concerto-cli/test/models/contractResolvedAll.json
index bf397b7c41..3ea87a64d3 100644
--- a/packages/concerto-cli/test/models/contractResolvedAll.json
+++ b/packages/concerto-cli/test/models/contractResolvedAll.json
@@ -1 +1 @@
-{"$class":"concerto.metamodel@1.0.0.Models","models":[{"$class":"concerto.metamodel@1.0.0.Model","namespace":"org.accordproject.cicero.contract","imports":[],"declarations":[{"$class":"concerto.metamodel@1.0.0.AssetDeclaration","name":"AccordContractState","isAbstract":false,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"stateId","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":809,"line":24,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":826,"line":25,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":757,"line":23,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":827,"line":25,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}},"identified":{"$class":"concerto.metamodel@1.0.0.IdentifiedBy","name":"stateId"}},{"$class":"concerto.metamodel@1.0.0.ParticipantDeclaration","name":"AccordParty","isAbstract":false,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"partyId","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":907,"line":29,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":924,"line":30,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":857,"line":28,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":925,"line":30,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}},"identified":{"$class":"concerto.metamodel@1.0.0.IdentifiedBy","name":"partyId"}},{"$class":"concerto.metamodel@1.0.0.AssetDeclaration","name":"AccordContract","isAbstract":true,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"contractId","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":1049,"line":34,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":1071,"line":35,"column":3,"$class":"concerto.metamodel@1.0.0.Position"}}},{"$class":"concerto.metamodel@1.0.0.RelationshipProperty","name":"parties","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"AccordParty","namespace":"org.accordproject.cicero.contract"},"isArray":true,"isOptional":true,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":1071,"line":35,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":1106,"line":36,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":990,"line":33,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":1107,"line":36,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}},"identified":{"$class":"concerto.metamodel@1.0.0.IdentifiedBy","name":"contractId"}},{"$class":"concerto.metamodel@1.0.0.AssetDeclaration","name":"AccordClause","isAbstract":true,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"clauseId","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":1224,"line":40,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":1242,"line":41,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":1169,"line":39,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":1243,"line":41,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}},"identified":{"$class":"concerto.metamodel@1.0.0.IdentifiedBy","name":"clauseId"}}]}]}
\ No newline at end of file
+{"$class":"concerto.metamodel@1.0.0.Models","models":[{"$class":"concerto.metamodel@1.0.0.Model","decorators":[],"namespace":"org.accordproject.cicero.contract","imports":[],"declarations":[{"$class":"concerto.metamodel@1.0.0.AssetDeclaration","name":"AccordContractState","isAbstract":false,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"stateId","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":809,"line":24,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":826,"line":25,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":757,"line":23,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":827,"line":25,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}},"identified":{"$class":"concerto.metamodel@1.0.0.IdentifiedBy","name":"stateId"}},{"$class":"concerto.metamodel@1.0.0.ParticipantDeclaration","name":"AccordParty","isAbstract":false,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"partyId","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":907,"line":29,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":924,"line":30,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":857,"line":28,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":925,"line":30,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}},"identified":{"$class":"concerto.metamodel@1.0.0.IdentifiedBy","name":"partyId"}},{"$class":"concerto.metamodel@1.0.0.AssetDeclaration","name":"AccordContract","isAbstract":true,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"contractId","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":1049,"line":34,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":1071,"line":35,"column":3,"$class":"concerto.metamodel@1.0.0.Position"}}},{"$class":"concerto.metamodel@1.0.0.RelationshipProperty","name":"parties","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"AccordParty","namespace":"org.accordproject.cicero.contract"},"isArray":true,"isOptional":true,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":1071,"line":35,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":1106,"line":36,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":990,"line":33,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":1107,"line":36,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}},"identified":{"$class":"concerto.metamodel@1.0.0.IdentifiedBy","name":"contractId"}},{"$class":"concerto.metamodel@1.0.0.AssetDeclaration","name":"AccordClause","isAbstract":true,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"clauseId","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":1224,"line":40,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":1242,"line":41,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":1169,"line":39,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":1243,"line":41,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}},"identified":{"$class":"concerto.metamodel@1.0.0.IdentifiedBy","name":"clauseId"}}]}]}
diff --git a/packages/concerto-core/api.txt b/packages/concerto-core/api.txt
index 82e91c2a85..8d7b4b0f40 100644
--- a/packages/concerto-core/api.txt
+++ b/packages/concerto-core/api.txt
@@ -73,6 +73,7 @@ class AssetDeclaration extends IdentifiedDeclaration {
 }
 class ClassDeclaration extends Decorated {
    + void constructor(ModelFile,Object) throws IllegalModelException
+   + ModelFile getModelFile() 
    + ClassDeclaration _resolveSuperType() 
    ~ void validate() throws IllegalModelException
    + boolean isAbstract() 
@@ -143,14 +144,16 @@ class Introspector {
    + ModelManager newMetaModelManager() 
    + object validateMetaModel() 
    + ModelManager modelManagerFromMetaModel() 
-class ModelFile {
+class ModelFile extends Decorated {
    + void constructor(ModelManager,object,string?,string?) throws IllegalModelException
+   ~ ModelFile getModelFile() 
    + boolean isModelFile() 
    + string getVersion() 
    + Boolean isSystemModelFile() 
    + boolean isExternal() 
    + ModelManager getModelManager() 
    + string[] getImports() 
+   ~ void validate() throws IllegalModelException
    + boolean isDefined(string) 
    + ClassDeclaration getLocalType(string) 
    + AssetDeclaration getAssetDeclaration(string) 
@@ -179,6 +182,7 @@ class ParticipantDeclaration extends IdentifiedDeclaration {
 }
 class Property extends Decorated {
    + void constructor(ClassDeclaration,Object) throws IllegalModelException
+   + ModelFile getModelFile() 
    + ClassDeclaration getParent() 
    ~ void validate(ClassDeclaration) throws IllegalModelException
    + string getName() 
diff --git a/packages/concerto-core/changelog.txt b/packages/concerto-core/changelog.txt
index 43d63741aa..bacbc4acb5 100644
--- a/packages/concerto-core/changelog.txt
+++ b/packages/concerto-core/changelog.txt
@@ -24,8 +24,9 @@
 # Note that the latest public API is documented using JSDocs and is available in api.txt.
 #
 
-Version 3.0.0 {b0c9b0951c58e3deeed8fbccf2dfd052} 2022-08-16
+Version 3.0.0 {d444400c2ba8cdba79972ae8ef95b478} 2022-08-18
 - Allow client-provided RegExp engine to ModelManager
+- Allow decorators to be attached to model files/namespaces
 
 Version 2.3.0 {774980a857090905fe276b6e94f1dbb1} 2022-07-21
 - Versioned namespaces
diff --git a/packages/concerto-core/lib/introspect/classdeclaration.js b/packages/concerto-core/lib/introspect/classdeclaration.js
index 1185ddf6e4..761bca90b3 100644
--- a/packages/concerto-core/lib/introspect/classdeclaration.js
+++ b/packages/concerto-core/lib/introspect/classdeclaration.js
@@ -55,10 +55,21 @@ class ClassDeclaration extends Decorated {
      * @throws {IllegalModelException}
      */
     constructor(modelFile, ast) {
-        super(modelFile, ast);
+        super(ast);
+        this.modelFile = modelFile;
         this.process();
     }
 
+    /**
+     * Returns the ModelFile that defines this class.
+     *
+     * @public
+     * @return {ModelFile} the owning ModelFile
+     */
+    getModelFile() {
+        return this.modelFile;
+    }
+
     /**
      * Process the AST and build the model
      *
diff --git a/packages/concerto-core/lib/introspect/decorated.js b/packages/concerto-core/lib/introspect/decorated.js
index 26876a6ade..0bbf5ee07f 100644
--- a/packages/concerto-core/lib/introspect/decorated.js
+++ b/packages/concerto-core/lib/introspect/decorated.js
@@ -38,27 +38,25 @@ class Decorated {
      * Create a Decorated from an Abstract Syntax Tree. The AST is the
      * result of parsing.
      *
-     * @param {ModelFile} modelFile - the model file
      * @param {string} ast - the AST created by the parser
      * @throws {IllegalModelException}
      */
-    constructor(modelFile, ast) {
-        if(!modelFile) {
-            throw new Error('modelFile not specified');
-        } else if(!ast) {
+    constructor(ast) {
+        if(!ast) {
             throw new Error('ast not specified');
         }
-        this.modelFile = modelFile;
         this.ast = ast;
     }
 
     /**
      * Returns the ModelFile that defines this class.
      *
+     * @abstract
+     * @protected
      * @return {ModelFile} the owning ModelFile
      */
     getModelFile() {
-        return this.modelFile;
+        throw new Error('not implemented');
     }
 
     /**
@@ -120,7 +118,8 @@ class Decorated {
             for(let i=n+1; i < this.decorators.length; i++) {
                 let otherDecorator = this.decorators[i];
                 if(decorator.getName() === otherDecorator.getName()) {
-                    throw new IllegalModelException(`Duplicate decorator ${decorator.getName()}`,this.modelFile, this.ast.location);
+                    let modelFile = this.getModelFile();
+                    throw new IllegalModelException(`Duplicate decorator ${decorator.getName()}`,modelFile, this.ast.location);
                 }
             }
         }
diff --git a/packages/concerto-core/lib/introspect/modelfile.js b/packages/concerto-core/lib/introspect/modelfile.js
index 968da57fec..a98b08be82 100644
--- a/packages/concerto-core/lib/introspect/modelfile.js
+++ b/packages/concerto-core/lib/introspect/modelfile.js
@@ -27,6 +27,7 @@ const EventDeclaration = require('./eventdeclaration');
 const IllegalModelException = require('./illegalmodelexception');
 const ModelUtil = require('../modelutil');
 const Globalize = require('../globalize');
+const Decorated = require('./decorated');
 
 // Types needed for TypeScript generation.
 /* eslint-disable no-unused-vars */
@@ -44,7 +45,7 @@ if (global === undefined) {
  * @class
  * @memberof module:concerto-core
  */
-class ModelFile {
+class ModelFile extends Decorated {
     /**
      * Create a ModelFile. This should only be called by framework code.
      * Use the ModelManager to manage ModelFiles.
@@ -56,6 +57,7 @@ class ModelFile {
      * @throws {IllegalModelException}
      */
     constructor(modelManager, ast, definitions, fileName) {
+        super(ast);
         this.modelManager = modelManager;
         this.external = false;
         this.declarations = [];
@@ -88,6 +90,9 @@ class ModelFile {
             this.external = fileName.startsWith('@');
         }
 
+        // Set up the decorators.
+        this.process();
+
         // Populate from the AST
         this.fromAst(this.ast);
         // Check version compatibility
@@ -101,6 +106,16 @@ class ModelFile {
         }
     }
 
+    /**
+     * Returns the ModelFile that defines this class.
+     *
+     * @protected
+     * @return {ModelFile} the owning ModelFile
+     */
+    getModelFile() {
+        return this;
+    }
+
     /**
      * Returns true
      * @returns {boolean} true
@@ -196,9 +211,10 @@ class ModelFile {
      * Validates the ModelFile.
      *
      * @throws {IllegalModelException} if the model is invalid
-     * @private
+     * @protected
      */
     validate() {
+        super.validate();
         // Validate all of the imports to check that they reference
         // namespaces or types that actually exist.
         this.getImports().forEach((importFqn) => {
diff --git a/packages/concerto-core/lib/introspect/property.js b/packages/concerto-core/lib/introspect/property.js
index 86561a7272..7dca99238f 100644
--- a/packages/concerto-core/lib/introspect/property.js
+++ b/packages/concerto-core/lib/introspect/property.js
@@ -24,6 +24,7 @@ const Decorated = require('./decorated');
 /* istanbul ignore next */
 if (global === undefined) {
     const ClassDeclaration = require('./classdeclaration');
+    const ModelFile = require('./modelfile');
 }
 /* eslint-enable no-unused-vars */
 
@@ -45,11 +46,21 @@ class Property extends Decorated {
      * @throws {IllegalModelException}
      */
     constructor(parent, ast) {
-        super(parent.getModelFile(), ast);
+        super(ast);
         this.parent = parent;
         this.process();
     }
 
+    /**
+     * Returns the ModelFile that defines this class.
+     *
+     * @public
+     * @return {ModelFile} the owning ModelFile
+     */
+    getModelFile() {
+        return this.parent.getModelFile();
+    }
+
     /**
      * Returns the owner of this property
      * @return {ClassDeclaration} the parent class declaration
diff --git a/packages/concerto-core/test/data/decorators/model.cto b/packages/concerto-core/test/data/decorators/model.cto
index 6b47e90b04..4652ed8709 100644
--- a/packages/concerto-core/test/data/decorators/model.cto
+++ b/packages/concerto-core/test/data/decorators/model.cto
@@ -12,6 +12,8 @@
  * limitations under the License.
  */
 
+@noargs
+@parens()
 namespace org.acme
 
 @noargs
diff --git a/packages/concerto-core/test/data/model/car.json b/packages/concerto-core/test/data/model/car.json
index 6aa1709a3b..c5c4a85ef5 100644
--- a/packages/concerto-core/test/data/model/car.json
+++ b/packages/concerto-core/test/data/model/car.json
@@ -1 +1 @@
-{"$class":"concerto.metamodel@1.0.0.Models","models":[{"$class":"concerto.metamodel@1.0.0.Model","namespace":"org.vehicle","imports":[],"declarations":[{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"Manufactured","isAbstract":true,"properties":[],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":23,"line":3,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":56,"line":4,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}}},{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"Vehicle","isAbstract":true,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"name","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":108,"line":7,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":124,"line":8,"column":3,"$class":"concerto.metamodel@1.0.0.Position"}}},{"$class":"concerto.metamodel@1.0.0.DoubleProperty","name":"range","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":124,"line":8,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":139,"line":9,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":58,"line":6,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":140,"line":9,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}},"superType":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Manufactured"}}]},{"$class":"concerto.metamodel@1.0.0.Model","namespace":"org.car","imports":[{"$class":"concerto.metamodel@1.0.0.ImportAll","namespace":"org.vehicle"}],"declarations":[{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"Car","isAbstract":false,"properties":[{"$class":"concerto.metamodel@1.0.0.DoubleProperty","name":"mileage","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":73,"line":6,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":90,"line":7,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":41,"line":5,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":91,"line":7,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}},"superType":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Vehicle"}}]}]}
\ No newline at end of file
+{"$class":"concerto.metamodel@1.0.0.Models","models":[{"$class":"concerto.metamodel@1.0.0.Model","decorators":[],"namespace":"org.vehicle","imports":[],"declarations":[{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"Manufactured","isAbstract":true,"properties":[],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":23,"line":3,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":56,"line":4,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}}},{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"Vehicle","isAbstract":true,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"name","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":108,"line":7,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":124,"line":8,"column":3,"$class":"concerto.metamodel@1.0.0.Position"}}},{"$class":"concerto.metamodel@1.0.0.DoubleProperty","name":"range","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":124,"line":8,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":139,"line":9,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":58,"line":6,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":140,"line":9,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}},"superType":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Manufactured"}}]},{"$class":"concerto.metamodel@1.0.0.Model","decorators":[],"namespace":"org.car","imports":[{"$class":"concerto.metamodel@1.0.0.ImportAll","namespace":"org.vehicle"}],"declarations":[{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"Car","isAbstract":false,"properties":[{"$class":"concerto.metamodel@1.0.0.DoubleProperty","name":"mileage","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":73,"line":6,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":90,"line":7,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":41,"line":5,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":91,"line":7,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}},"superType":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Vehicle"}}]}]}
diff --git a/packages/concerto-core/test/data/model/carResolved.json b/packages/concerto-core/test/data/model/carResolved.json
index 3e3510129a..667973508c 100644
--- a/packages/concerto-core/test/data/model/carResolved.json
+++ b/packages/concerto-core/test/data/model/carResolved.json
@@ -1 +1 @@
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\ No newline at end of file
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diff --git a/packages/concerto-core/test/data/model/empty.json b/packages/concerto-core/test/data/model/empty.json
index 3524c4b08e..2983369452 100644
--- a/packages/concerto-core/test/data/model/empty.json
+++ b/packages/concerto-core/test/data/model/empty.json
@@ -1 +1 @@
-{"$class":"concerto.metamodel@1.0.0.Model","namespace":"test.empty","imports":[],"declarations":[]}
\ No newline at end of file
+{"$class":"concerto.metamodel@1.0.0.Model","decorators":[],"namespace":"test.empty","imports":[],"declarations":[]}
diff --git a/packages/concerto-core/test/data/model/emptyResolved.json b/packages/concerto-core/test/data/model/emptyResolved.json
index 3524c4b08e..2983369452 100644
--- a/packages/concerto-core/test/data/model/emptyResolved.json
+++ b/packages/concerto-core/test/data/model/emptyResolved.json
@@ -1 +1 @@
-{"$class":"concerto.metamodel@1.0.0.Model","namespace":"test.empty","imports":[],"declarations":[]}
\ No newline at end of file
+{"$class":"concerto.metamodel@1.0.0.Model","decorators":[],"namespace":"test.empty","imports":[],"declarations":[]}
diff --git a/packages/concerto-core/test/data/model/person.json b/packages/concerto-core/test/data/model/person.json
index 6c8ae2b448..3f444984da 100644
--- a/packages/concerto-core/test/data/model/person.json
+++ b/packages/concerto-core/test/data/model/person.json
@@ -1 +1 @@
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diff --git a/packages/concerto-core/test/data/model/personResolved.json b/packages/concerto-core/test/data/model/personResolved.json
index fa9f9c0587..e41e5406b0 100644
--- a/packages/concerto-core/test/data/model/personResolved.json
+++ b/packages/concerto-core/test/data/model/personResolved.json
@@ -1,5 +1,6 @@
 {
     "$class": "concerto.metamodel@1.0.0.Model",
+    "decorators": [],
     "namespace": "test.person",
     "imports": [
         {
@@ -1458,4 +1459,4 @@
             }
         }
     ]
-}
\ No newline at end of file
+}
diff --git a/packages/concerto-core/test/data/model/versionMeta.json b/packages/concerto-core/test/data/model/versionMeta.json
index 7983e42971..93710a315e 100644
--- a/packages/concerto-core/test/data/model/versionMeta.json
+++ b/packages/concerto-core/test/data/model/versionMeta.json
@@ -1 +1 @@
-{"$class":"concerto.metamodel@1.0.0.Model","namespace":"test.version","imports":[],"declarations":[{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"Foo","isAbstract":false,"properties":[],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":53,"line":5,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":68,"line":6,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}}}],"concertoVersion":">= 1.0.0"}
\ No newline at end of file
+{"$class":"concerto.metamodel@1.0.0.Model","decorators":[],"namespace":"test.version","imports":[],"declarations":[{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"Foo","isAbstract":false,"properties":[],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":53,"line":5,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":68,"line":6,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}}}],"concertoVersion":">= 1.0.0"}
diff --git a/packages/concerto-core/test/introspect/decorated.js b/packages/concerto-core/test/introspect/decorated.js
index d64c989374..ebfcbb6440 100644
--- a/packages/concerto-core/test/introspect/decorated.js
+++ b/packages/concerto-core/test/introspect/decorated.js
@@ -32,15 +32,9 @@ describe('Decorated', () => {
 
     describe('#constructor', () => {
 
-        it('should throw if modelFile not specified', () => {
-            (() => {
-                new Decorated(null, { ast: true });
-            }).should.throw(/modelFile not specified/);
-        });
-
         it('should throw if ast not specified', () => {
             (() => {
-                new Decorated(modelFile, null);
+                new Decorated(null);
             }).should.throw(/ast not specified/);
         });
 
@@ -48,8 +42,10 @@ describe('Decorated', () => {
 
     describe('#getModelFile', () => {
 
-        it('should return the model file', () => {
-            decorated.getModelFile().should.equal(modelFile);
+        it('should throw as abstract', () => {
+            (() => {
+                decorated.getModelFile();
+            }).should.throw(/not implemented/);
         });
 
     });
diff --git a/packages/concerto-core/test/introspect/decorators.js b/packages/concerto-core/test/introspect/decorators.js
index 522c25f367..cb3813ae01 100644
--- a/packages/concerto-core/test/introspect/decorators.js
+++ b/packages/concerto-core/test/introspect/decorators.js
@@ -83,9 +83,15 @@ describe('Decorators', () => {
             const modelManager = new ModelManager();
             Util.addComposerModel(modelManager);
             let modelDefinitions = fs.readFileSync('test/data/decorators/model.cto', 'utf8');
-            modelManager.addCTOModel(modelDefinitions);
+            const modelFile = modelManager.addCTOModel(modelDefinitions);
             const introspector = new Introspector(modelManager);
 
+            modelFile.getDecorators().length.should.equal(2);
+            modelFile.getDecorator('noargs').should.not.be.null;
+            modelFile.getDecorator('noargs').getArguments().length.should.equal(0);
+            modelFile.getDecorator('parens').should.not.be.null;
+            modelFile.getDecorator('parens').getArguments().length.should.equal(0);
+
             const car = introspector.getClassDeclaration('org.acme.Car');
             checkAll(car, 'asset');
 
diff --git a/packages/concerto-core/test/introspect/modelfile.js b/packages/concerto-core/test/introspect/modelfile.js
index 8ae4ff3c80..4a183a40ba 100644
--- a/packages/concerto-core/test/introspect/modelfile.js
+++ b/packages/concerto-core/test/introspect/modelfile.js
@@ -58,7 +58,7 @@ describe('ModelFile', () => {
         it('should throw when non object ast provided', () => {
             (() => {
                 new ModelFile(modelManager, null);
-            }).should.throw(/model AST as input/);
+            }).should.throw(/ast not specified/);
         });
 
         it('should throw when invalid definitions provided', () => {
diff --git a/packages/concerto-core/types/lib/introspect/classdeclaration.d.ts b/packages/concerto-core/types/lib/introspect/classdeclaration.d.ts
index 4f1f9160b4..44ddbb6943 100644
--- a/packages/concerto-core/types/lib/introspect/classdeclaration.d.ts
+++ b/packages/concerto-core/types/lib/introspect/classdeclaration.d.ts
@@ -20,6 +20,7 @@ declare class ClassDeclaration extends Decorated {
      * @throws {IllegalModelException}
      */
     constructor(modelFile: ModelFile, ast: any);
+    modelFile: ModelFile;
     name: any;
     properties: any[];
     superType: any;
@@ -212,5 +213,5 @@ declare class ClassDeclaration extends Decorated {
     isClassDeclaration(): boolean;
 }
 import Decorated = require("./decorated");
-import Property = require("./property");
 import ModelFile = require("./modelfile");
+import Property = require("./property");
diff --git a/packages/concerto-core/types/lib/introspect/decorated.d.ts b/packages/concerto-core/types/lib/introspect/decorated.d.ts
index c08df92d91..f4bcd9f597 100644
--- a/packages/concerto-core/types/lib/introspect/decorated.d.ts
+++ b/packages/concerto-core/types/lib/introspect/decorated.d.ts
@@ -12,19 +12,19 @@ declare class Decorated {
      * Create a Decorated from an Abstract Syntax Tree. The AST is the
      * result of parsing.
      *
-     * @param {ModelFile} modelFile - the model file
      * @param {string} ast - the AST created by the parser
      * @throws {IllegalModelException}
      */
-    constructor(modelFile: ModelFile, ast: string);
-    modelFile: ModelFile;
+    constructor(ast: string);
     ast: string;
     /**
      * Returns the ModelFile that defines this class.
      *
+     * @abstract
+     * @protected
      * @return {ModelFile} the owning ModelFile
      */
-    getModelFile(): ModelFile;
+    protected getModelFile(): ModelFile;
     /**
      * Visitor design pattern
      * @param {Object} visitor - the visitor
diff --git a/packages/concerto-core/types/lib/introspect/modelfile.d.ts b/packages/concerto-core/types/lib/introspect/modelfile.d.ts
index 941f22733f..782ade7244 100644
--- a/packages/concerto-core/types/lib/introspect/modelfile.d.ts
+++ b/packages/concerto-core/types/lib/introspect/modelfile.d.ts
@@ -6,7 +6,7 @@ export = ModelFile;
  * @class
  * @memberof module:concerto-core
  */
-declare class ModelFile {
+declare class ModelFile extends Decorated {
     /**
      * Create a ModelFile. This should only be called by framework code.
      * Use the ModelManager to manage ModelFiles.
@@ -65,14 +65,6 @@ declare class ModelFile {
      * @private
      */
     private getExternalImports;
-    /**
-     * Visitor design pattern
-     * @param {Object} visitor - the visitor
-     * @param {Object} parameters  - the parameter
-     * @return {Object} the result of visiting or null
-     * @private
-     */
-    private accept;
     /**
      * Returns the ModelManager associated with this ModelFile
      *
@@ -89,9 +81,9 @@ declare class ModelFile {
      * Validates the ModelFile.
      *
      * @throws {IllegalModelException} if the model is invalid
-     * @private
+     * @protected
      */
-    private validate;
+    protected validate(): void;
     /**
      * Check that the type is valid.
      * @param {string} context - error reporting context
@@ -263,6 +255,7 @@ declare class ModelFile {
     private fromAst;
     namespace: any;
 }
+import Decorated = require("./decorated");
 import ModelManager = require("../modelmanager");
 import ClassDeclaration = require("./classdeclaration");
 import AssetDeclaration = require("./assetdeclaration");
diff --git a/packages/concerto-cto/lib/parser.js b/packages/concerto-cto/lib/parser.js
index f1f9b54544..938a6cf34e 100644
--- a/packages/concerto-cto/lib/parser.js
+++ b/packages/concerto-cto/lib/parser.js
@@ -987,9 +987,10 @@ function peg$parse(input, options) {
   var peg$f90 = function(version) {
        return version.value;
      };
-  var peg$f91 = function(version, ns, imports, body) {
+  var peg$f91 = function(version, decorators, ns, imports, body) {
       const result = {
         $class: "concerto.metamodel@1.0.0.Model",
+        decorators: optionalList(decorators),
         namespace: ns,
         imports: optionalList(imports),
         declarations: optionalList(body)
@@ -9941,25 +9942,26 @@ function peg$parse(input, options) {
   }
 
   function peg$parseModel() {
-    var s0, s1, s2, s3, s4;
+    var s0, s1, s2, s3, s4, s5;
 
     s0 = peg$currPos;
     s1 = peg$parseVersion();
     if (s1 === peg$FAILED) {
       s1 = null;
     }
-    s2 = peg$parseNamespace();
-    if (s2 !== peg$FAILED) {
-      s3 = peg$parseImports();
-      if (s3 === peg$FAILED) {
-        s3 = null;
-      }
-      s4 = peg$parseSourceElements();
+    s2 = peg$parseDecorators();
+    s3 = peg$parseNamespace();
+    if (s3 !== peg$FAILED) {
+      s4 = peg$parseImports();
       if (s4 === peg$FAILED) {
         s4 = null;
       }
+      s5 = peg$parseSourceElements();
+      if (s5 === peg$FAILED) {
+        s5 = null;
+      }
       peg$savedPos = s0;
-      s0 = peg$f91(s1, s2, s3, s4);
+      s0 = peg$f91(s1, s2, s3, s4, s5);
     } else {
       peg$currPos = s0;
       s0 = peg$FAILED;
diff --git a/packages/concerto-cto/lib/parser.pegjs b/packages/concerto-cto/lib/parser.pegjs
index fe9557101b..18c9a1078b 100644
--- a/packages/concerto-cto/lib/parser.pegjs
+++ b/packages/concerto-cto/lib/parser.pegjs
@@ -1435,9 +1435,10 @@ Version
      }
 
 Model
-  = version:Version? ns:Namespace imports:Imports? body:SourceElements? {
+  = version:Version? decorators:Decorators? ns:Namespace imports:Imports? body:SourceElements? {
       const result = {
         $class: "concerto.metamodel@1.0.0.Model",
+        decorators: optionalList(decorators),
         namespace: ns,
         imports: optionalList(imports),
         declarations: optionalList(body)
diff --git a/packages/concerto-cto/lib/printer.js b/packages/concerto-cto/lib/printer.js
index d1e070cf41..a4ce65c3cd 100644
--- a/packages/concerto-cto/lib/printer.js
+++ b/packages/concerto-cto/lib/printer.js
@@ -231,6 +231,9 @@ function toCTO(metaModel) {
         result += '\n';
         result += '\n';
     }
+    if (metaModel.decorators && metaModel.decorators.length > 0) {
+        result += decoratorsFromMetaModel(metaModel.decorators, '');
+    }
     result += `namespace ${metaModel.namespace}`;
     if (metaModel.imports && metaModel.imports.length > 0) {
         result += '\n';
diff --git a/packages/concerto-cto/test/cto/decorators.cto b/packages/concerto-cto/test/cto/decorators.cto
index 439e7276a7..df7c361dd9 100644
--- a/packages/concerto-cto/test/cto/decorators.cto
+++ b/packages/concerto-cto/test/cto/decorators.cto
@@ -1,3 +1,5 @@
+@noargs
+@parens()
 namespace org.acme
 
 @noargs
@@ -89,4 +91,4 @@ transaction MyTransactionIdentifier4 {
 
 @returns(true)
 transaction MyTransactionIdentifier5 {
-}
\ No newline at end of file
+}
diff --git a/packages/concerto-cto/test/cto/decorators.json b/packages/concerto-cto/test/cto/decorators.json
index fc764031a9..1ca6b7d101 100644
--- a/packages/concerto-cto/test/cto/decorators.json
+++ b/packages/concerto-cto/test/cto/decorators.json
@@ -1 +1,2425 @@
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\ No newline at end of file
diff --git a/packages/concerto-cto/test/cto/field.json b/packages/concerto-cto/test/cto/field.json
index 026351fb6d..dff0470430 100644
--- a/packages/concerto-cto/test/cto/field.json
+++ b/packages/concerto-cto/test/cto/field.json
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\ No newline at end of file
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diff --git a/packages/concerto-cto/test/cto/identified.json b/packages/concerto-cto/test/cto/identified.json
index 81654d2181..f8e4954b4f 100644
--- a/packages/concerto-cto/test/cto/identified.json
+++ b/packages/concerto-cto/test/cto/identified.json
@@ -1 +1 @@
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\ No newline at end of file
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diff --git a/packages/concerto-cto/test/cto/person.json b/packages/concerto-cto/test/cto/person.json
index 6c8ae2b448..3f444984da 100644
--- a/packages/concerto-cto/test/cto/person.json
+++ b/packages/concerto-cto/test/cto/person.json
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diff --git a/packages/concerto-cto/test/cto/person.no-location.json b/packages/concerto-cto/test/cto/person.no-location.json
index 20b9e5487d..a0a34fb6c5 100644
--- a/packages/concerto-cto/test/cto/person.no-location.json
+++ b/packages/concerto-cto/test/cto/person.no-location.json
@@ -1 +1 @@
-{"$class":"concerto.metamodel@1.0.0.Model","namespace":"test.person","imports":[{"$class":"concerto.metamodel@1.0.0.ImportAll","namespace":"org.accordproject.time","uri":"https://models.accordproject.org/time@0.2.0.cto"},{"$class":"concerto.metamodel@1.0.0.ImportType","name":"TemporalUnit","namespace":"org.accordproject.time","uri":"https://models.accordproject.org/time@0.2.0.cto"}],"declarations":[{"$class":"concerto.metamodel@1.0.0.EnumDeclaration","name":"Gender","properties":[{"$class":"concerto.metamodel@1.0.0.EnumProperty","name":"MALE"},{"$class":"concerto.metamodel@1.0.0.EnumProperty","name":"FEMALE"},{"$class":"concerto.metamodel@1.0.0.EnumProperty","name":"OTHER"}]},{"$class":"concerto.metamodel@1.0.0.ParticipantDeclaration","name":"Individual","isAbstract":true,"properties":[]},{"$class":"concerto.metamodel@1.0.0.ParticipantDeclaration","name":"Person","isAbstract":false,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"firstName","isArray":false,"isOptional":false,"validator":{"$class":"concerto.metamodel@1.0.0.StringRegexValidator","pattern":"[a-zA-Z]*","flags":"u"}},{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"lastName","isArray":false,"isOptional":false},{"$class":"concerto.metamodel@1.0.0.ObjectProperty","name":"address","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Address"},"isArray":false,"isOptional":false},{"$class":"concerto.metamodel@1.0.0.ObjectProperty","name":"address2","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Address"},"isArray":false,"isOptional":false,"defaultValue":"USAddress"},{"$class":"concerto.metamodel@1.0.0.RelationshipProperty","name":"address3","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Address"},"isArray":false,"isOptional":false},{"$class":"concerto.metamodel@1.0.0.RelationshipProperty","name":"address4","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Address"},"isArray":true,"isOptional":false},{"$class":"concerto.metamodel@1.0.0.RelationshipProperty","name":"address5","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Address"},"isArray":false,"isOptional":true},{"$class":"concerto.metamodel@1.0.0.ObjectProperty","name":"gender","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Gender"},"isArray":false,"isOptional":false},{"$class":"concerto.metamodel@1.0.0.DateTimeProperty","name":"dob","isArray":false,"isOptional":true}],"superType":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Individual"}},{"$class":"concerto.metamodel@1.0.0.ParticipantDeclaration","name":"Employee","isAbstract":false,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"company","isArray":false,"isOptional":false},{"$class":"concerto.metamodel@1.0.0.BooleanProperty","name":"onLeave","isArray":false,"isOptional":false}],"superType":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Person"}},{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"Address","isAbstract":false,"properties":[{"$class":"concerto.metamodel@1.0.0.IntegerProperty","name":"zip","isArray":false,"isOptional":false,"defaultValue":10001},{"$class":"concerto.metamodel@1.0.0.LongProperty","name":"zip2","isArray":false,"isOptional":false,"defaultValue":10001},{"$class":"concerto.metamodel@1.0.0.DoubleProperty","name":"zip3","isArray":false,"isOptional":false,"defaultValue":10001},{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"city","isArray":false,"isOptional":false,"defaultValue":"NYC"},{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"country","isArray":false,"isOptional":false,"defaultValue":"USA"},{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"street","isArray":true,"isOptional":false},{"$class":"concerto.metamodel@1.0.0.BooleanProperty","name":"isResidential","isArray":false,"isOptional":false,"defaultValue":true},{"$class":"concerto.metamodel@1.0.0.BooleanProperty","name":"isPrivate","isArray":false,"isOptional":false,"defaultValue":false}],"identified":{"$class":"concerto.metamodel@1.0.0.Identified"}},{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"USAddress","isAbstract":false,"properties":[{"$class":"concerto.metamodel@1.0.0.IntegerProperty","name":"zip4","isArray":false,"isOptional":false,"decorators":[{"$class":"concerto.metamodel@1.0.0.Decorator","name":"Zip","arguments":[{"$class":"concerto.metamodel@1.0.0.DecoratorString","value":"x"},{"$class":"concerto.metamodel@1.0.0.DecoratorNumber","value":1},{"$class":"concerto.metamodel@1.0.0.DecoratorString","value":"y"},{"$class":"concerto.metamodel@1.0.0.DecoratorString","value":"foo"},{"$class":"concerto.metamodel@1.0.0.DecoratorString","value":"z"},{"$class":"concerto.metamodel@1.0.0.DecoratorBoolean","value":true}]},{"$class":"concerto.metamodel@1.0.0.Decorator","name":"Zip2","arguments":[]},{"$class":"concerto.metamodel@1.0.0.Decorator","name":"Zip3"}],"validator":{"$class":"concerto.metamodel@1.0.0.IntegerDomainValidator","lower":-365,"upper":365}},{"$class":"concerto.metamodel@1.0.0.IntegerProperty","name":"zip41","isArray":false,"isOptional":false,"validator":{"$class":"concerto.metamodel@1.0.0.IntegerDomainValidator","upper":365}},{"$class":"concerto.metamodel@1.0.0.IntegerProperty","name":"zip42","isArray":false,"isOptional":false,"validator":{"$class":"concerto.metamodel@1.0.0.IntegerDomainValidator","lower":-365}},{"$class":"concerto.metamodel@1.0.0.LongProperty","name":"zip5","isArray":false,"isOptional":false,"validator":{"$class":"concerto.metamodel@1.0.0.LongDomainValidator","lower":-365,"upper":365}},{"$class":"concerto.metamodel@1.0.0.LongProperty","name":"zip51","isArray":false,"isOptional":false,"validator":{"$class":"concerto.metamodel@1.0.0.LongDomainValidator","upper":365}},{"$class":"concerto.metamodel@1.0.0.LongProperty","name":"zip52","isArray":false,"isOptional":false,"validator":{"$class":"concerto.metamodel@1.0.0.LongDomainValidator","lower":-365}},{"$class":"concerto.metamodel@1.0.0.DoubleProperty","name":"zip6","isArray":false,"isOptional":false,"validator":{"$class":"concerto.metamodel@1.0.0.DoubleDomainValidator","lower":-3.14,"upper":3.14}},{"$class":"concerto.metamodel@1.0.0.DoubleProperty","name":"zip61","isArray":false,"isOptional":false,"validator":{"$class":"concerto.metamodel@1.0.0.DoubleDomainValidator","lower":-3.14}},{"$class":"concerto.metamodel@1.0.0.DoubleProperty","name":"zip62","isArray":false,"isOptional":false,"validator":{"$class":"concerto.metamodel@1.0.0.DoubleDomainValidator","upper":3.14}}],"superType":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Address"},"decorators":[{"$class":"concerto.metamodel@1.0.0.Decorator","name":"Address","arguments":[{"$class":"concerto.metamodel@1.0.0.DecoratorString","value":"x"},{"$class":"concerto.metamodel@1.0.0.DecoratorNumber","value":1},{"$class":"concerto.metamodel@1.0.0.DecoratorString","value":"y"},{"$class":"concerto.metamodel@1.0.0.DecoratorString","value":"foo"},{"$class":"concerto.metamodel@1.0.0.DecoratorString","value":"z"},{"$class":"concerto.metamodel@1.0.0.DecoratorBoolean","value":true},{"$class":"concerto.metamodel@1.0.0.DecoratorTypeReference","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Gender"},"isArray":false},{"$class":"concerto.metamodel@1.0.0.DecoratorTypeReference","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"TemporalUnit"},"isArray":true}]},{"$class":"concerto.metamodel@1.0.0.Decorator","name":"Address2","arguments":[]},{"$class":"concerto.metamodel@1.0.0.Decorator","name":"Address3"}]},{"$class":"concerto.metamodel@1.0.0.AssetDeclaration","name":"A","isAbstract":false,"properties":[]},{"$class":"concerto.metamodel@1.0.0.EventDeclaration","name":"E","isAbstract":false,"properties":[]},{"$class":"concerto.metamodel@1.0.0.TransactionDeclaration","name":"T","isAbstract":false,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"id","isArray":false,"isOptional":false},{"$class":"concerto.metamodel@1.0.0.ObjectProperty","name":"tu","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"TemporalUnit"},"isArray":false,"isOptional":false},{"$class":"concerto.metamodel@1.0.0.ObjectProperty","name":"month","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Month"},"isArray":false,"isOptional":false},{"$class":"concerto.metamodel@1.0.0.ObjectProperty","name":"p","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Participant"},"isArray":false,"isOptional":false}],"identified":{"$class":"concerto.metamodel@1.0.0.IdentifiedBy","name":"id"}}]}
+{"$class":"concerto.metamodel@1.0.0.Model","decorators":[],"namespace":"test.person","imports":[{"$class":"concerto.metamodel@1.0.0.ImportAll","namespace":"org.accordproject.time","uri":"https://models.accordproject.org/time@0.2.0.cto"},{"$class":"concerto.metamodel@1.0.0.ImportType","name":"TemporalUnit","namespace":"org.accordproject.time","uri":"https://models.accordproject.org/time@0.2.0.cto"}],"declarations":[{"$class":"concerto.metamodel@1.0.0.EnumDeclaration","name":"Gender","properties":[{"$class":"concerto.metamodel@1.0.0.EnumProperty","name":"MALE"},{"$class":"concerto.metamodel@1.0.0.EnumProperty","name":"FEMALE"},{"$class":"concerto.metamodel@1.0.0.EnumProperty","name":"OTHER"}]},{"$class":"concerto.metamodel@1.0.0.ParticipantDeclaration","name":"Individual","isAbstract":true,"properties":[]},{"$class":"concerto.metamodel@1.0.0.ParticipantDeclaration","name":"Person","isAbstract":false,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"firstName","isArray":false,"isOptional":false,"validator":{"$class":"concerto.metamodel@1.0.0.StringRegexValidator","pattern":"[a-zA-Z]*","flags":"u"}},{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"lastName","isArray":false,"isOptional":false},{"$class":"concerto.metamodel@1.0.0.ObjectProperty","name":"address","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Address"},"isArray":false,"isOptional":false},{"$class":"concerto.metamodel@1.0.0.ObjectProperty","name":"address2","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Address"},"isArray":false,"isOptional":false,"defaultValue":"USAddress"},{"$class":"concerto.metamodel@1.0.0.RelationshipProperty","name":"address3","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Address"},"isArray":false,"isOptional":false},{"$class":"concerto.metamodel@1.0.0.RelationshipProperty","name":"address4","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Address"},"isArray":true,"isOptional":false},{"$class":"concerto.metamodel@1.0.0.RelationshipProperty","name":"address5","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Address"},"isArray":false,"isOptional":true},{"$class":"concerto.metamodel@1.0.0.ObjectProperty","name":"gender","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Gender"},"isArray":false,"isOptional":false},{"$class":"concerto.metamodel@1.0.0.DateTimeProperty","name":"dob","isArray":false,"isOptional":true}],"superType":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Individual"}},{"$class":"concerto.metamodel@1.0.0.ParticipantDeclaration","name":"Employee","isAbstract":false,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"company","isArray":false,"isOptional":false},{"$class":"concerto.metamodel@1.0.0.BooleanProperty","name":"onLeave","isArray":false,"isOptional":false}],"superType":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Person"}},{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"Address","isAbstract":false,"properties":[{"$class":"concerto.metamodel@1.0.0.IntegerProperty","name":"zip","isArray":false,"isOptional":false,"defaultValue":10001},{"$class":"concerto.metamodel@1.0.0.LongProperty","name":"zip2","isArray":false,"isOptional":false,"defaultValue":10001},{"$class":"concerto.metamodel@1.0.0.DoubleProperty","name":"zip3","isArray":false,"isOptional":false,"defaultValue":10001},{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"city","isArray":false,"isOptional":false,"defaultValue":"NYC"},{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"country","isArray":false,"isOptional":false,"defaultValue":"USA"},{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"street","isArray":true,"isOptional":false},{"$class":"concerto.metamodel@1.0.0.BooleanProperty","name":"isResidential","isArray":false,"isOptional":false,"defaultValue":true},{"$class":"concerto.metamodel@1.0.0.BooleanProperty","name":"isPrivate","isArray":false,"isOptional":false,"defaultValue":false}],"identified":{"$class":"concerto.metamodel@1.0.0.Identified"}},{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"USAddress","isAbstract":false,"properties":[{"$class":"concerto.metamodel@1.0.0.IntegerProperty","name":"zip4","isArray":false,"isOptional":false,"decorators":[{"$class":"concerto.metamodel@1.0.0.Decorator","name":"Zip","arguments":[{"$class":"concerto.metamodel@1.0.0.DecoratorString","value":"x"},{"$class":"concerto.metamodel@1.0.0.DecoratorNumber","value":1},{"$class":"concerto.metamodel@1.0.0.DecoratorString","value":"y"},{"$class":"concerto.metamodel@1.0.0.DecoratorString","value":"foo"},{"$class":"concerto.metamodel@1.0.0.DecoratorString","value":"z"},{"$class":"concerto.metamodel@1.0.0.DecoratorBoolean","value":true}]},{"$class":"concerto.metamodel@1.0.0.Decorator","name":"Zip2","arguments":[]},{"$class":"concerto.metamodel@1.0.0.Decorator","name":"Zip3"}],"validator":{"$class":"concerto.metamodel@1.0.0.IntegerDomainValidator","lower":-365,"upper":365}},{"$class":"concerto.metamodel@1.0.0.IntegerProperty","name":"zip41","isArray":false,"isOptional":false,"validator":{"$class":"concerto.metamodel@1.0.0.IntegerDomainValidator","upper":365}},{"$class":"concerto.metamodel@1.0.0.IntegerProperty","name":"zip42","isArray":false,"isOptional":false,"validator":{"$class":"concerto.metamodel@1.0.0.IntegerDomainValidator","lower":-365}},{"$class":"concerto.metamodel@1.0.0.LongProperty","name":"zip5","isArray":false,"isOptional":false,"validator":{"$class":"concerto.metamodel@1.0.0.LongDomainValidator","lower":-365,"upper":365}},{"$class":"concerto.metamodel@1.0.0.LongProperty","name":"zip51","isArray":false,"isOptional":false,"validator":{"$class":"concerto.metamodel@1.0.0.LongDomainValidator","upper":365}},{"$class":"concerto.metamodel@1.0.0.LongProperty","name":"zip52","isArray":false,"isOptional":false,"validator":{"$class":"concerto.metamodel@1.0.0.LongDomainValidator","lower":-365}},{"$class":"concerto.metamodel@1.0.0.DoubleProperty","name":"zip6","isArray":false,"isOptional":false,"validator":{"$class":"concerto.metamodel@1.0.0.DoubleDomainValidator","lower":-3.14,"upper":3.14}},{"$class":"concerto.metamodel@1.0.0.DoubleProperty","name":"zip61","isArray":false,"isOptional":false,"validator":{"$class":"concerto.metamodel@1.0.0.DoubleDomainValidator","lower":-3.14}},{"$class":"concerto.metamodel@1.0.0.DoubleProperty","name":"zip62","isArray":false,"isOptional":false,"validator":{"$class":"concerto.metamodel@1.0.0.DoubleDomainValidator","upper":3.14}}],"superType":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Address"},"decorators":[{"$class":"concerto.metamodel@1.0.0.Decorator","name":"Address","arguments":[{"$class":"concerto.metamodel@1.0.0.DecoratorString","value":"x"},{"$class":"concerto.metamodel@1.0.0.DecoratorNumber","value":1},{"$class":"concerto.metamodel@1.0.0.DecoratorString","value":"y"},{"$class":"concerto.metamodel@1.0.0.DecoratorString","value":"foo"},{"$class":"concerto.metamodel@1.0.0.DecoratorString","value":"z"},{"$class":"concerto.metamodel@1.0.0.DecoratorBoolean","value":true},{"$class":"concerto.metamodel@1.0.0.DecoratorTypeReference","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Gender"},"isArray":false},{"$class":"concerto.metamodel@1.0.0.DecoratorTypeReference","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"TemporalUnit"},"isArray":true}]},{"$class":"concerto.metamodel@1.0.0.Decorator","name":"Address2","arguments":[]},{"$class":"concerto.metamodel@1.0.0.Decorator","name":"Address3"}]},{"$class":"concerto.metamodel@1.0.0.AssetDeclaration","name":"A","isAbstract":false,"properties":[]},{"$class":"concerto.metamodel@1.0.0.EventDeclaration","name":"E","isAbstract":false,"properties":[]},{"$class":"concerto.metamodel@1.0.0.TransactionDeclaration","name":"T","isAbstract":false,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"id","isArray":false,"isOptional":false},{"$class":"concerto.metamodel@1.0.0.ObjectProperty","name":"tu","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"TemporalUnit"},"isArray":false,"isOptional":false},{"$class":"concerto.metamodel@1.0.0.ObjectProperty","name":"month","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Month"},"isArray":false,"isOptional":false},{"$class":"concerto.metamodel@1.0.0.ObjectProperty","name":"p","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Participant"},"isArray":false,"isOptional":false}],"identified":{"$class":"concerto.metamodel@1.0.0.IdentifiedBy","name":"id"}}]}
diff --git a/packages/concerto-cto/test/cto/semver-imports.json b/packages/concerto-cto/test/cto/semver-imports.json
index 17e5a30629..cd34a7443e 100644
--- a/packages/concerto-cto/test/cto/semver-imports.json
+++ b/packages/concerto-cto/test/cto/semver-imports.json
@@ -1,5 +1,6 @@
 {
    "$class": "concerto.metamodel@1.0.0.Model",
+   "decorators": [],
    "namespace": "test.person@1.0.0-alpha.0+build1",
    "imports": [
       {
@@ -60,4 +61,4 @@
          }
       }
    ]
-}
\ No newline at end of file
+}
diff --git a/packages/concerto-cto/test/cto/semver.json b/packages/concerto-cto/test/cto/semver.json
index 3e296843b5..3522479ce4 100644
--- a/packages/concerto-cto/test/cto/semver.json
+++ b/packages/concerto-cto/test/cto/semver.json
@@ -1,5 +1,6 @@
 {
     "$class": "concerto.metamodel@1.0.0.Model",
+    "decorators": [],
     "namespace": "test.person@1.0.0-alpha.0+build1",
     "imports": [],
     "declarations": [
@@ -51,4 +52,4 @@
           }
        }
     ]
- }
\ No newline at end of file
+ }
diff --git a/packages/concerto-cto/test/cto/versionMeta.json b/packages/concerto-cto/test/cto/versionMeta.json
index 7983e42971..93710a315e 100644
--- a/packages/concerto-cto/test/cto/versionMeta.json
+++ b/packages/concerto-cto/test/cto/versionMeta.json
@@ -1 +1 @@
-{"$class":"concerto.metamodel@1.0.0.Model","namespace":"test.version","imports":[],"declarations":[{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"Foo","isAbstract":false,"properties":[],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":53,"line":5,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":68,"line":6,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}}}],"concertoVersion":">= 1.0.0"}
\ No newline at end of file
+{"$class":"concerto.metamodel@1.0.0.Model","decorators":[],"namespace":"test.version","imports":[],"declarations":[{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"Foo","isAbstract":false,"properties":[],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":53,"line":5,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":68,"line":6,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}}}],"concertoVersion":">= 1.0.0"}
diff --git a/packages/concerto-cto/test/external/car.json b/packages/concerto-cto/test/external/car.json
index 6aa1709a3b..c5c4a85ef5 100644
--- a/packages/concerto-cto/test/external/car.json
+++ b/packages/concerto-cto/test/external/car.json
@@ -1 +1 @@
-{"$class":"concerto.metamodel@1.0.0.Models","models":[{"$class":"concerto.metamodel@1.0.0.Model","namespace":"org.vehicle","imports":[],"declarations":[{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"Manufactured","isAbstract":true,"properties":[],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":23,"line":3,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":56,"line":4,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}}},{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"Vehicle","isAbstract":true,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"name","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":108,"line":7,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":124,"line":8,"column":3,"$class":"concerto.metamodel@1.0.0.Position"}}},{"$class":"concerto.metamodel@1.0.0.DoubleProperty","name":"range","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":124,"line":8,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":139,"line":9,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":58,"line":6,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":140,"line":9,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}},"superType":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Manufactured"}}]},{"$class":"concerto.metamodel@1.0.0.Model","namespace":"org.car","imports":[{"$class":"concerto.metamodel@1.0.0.ImportAll","namespace":"org.vehicle"}],"declarations":[{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"Car","isAbstract":false,"properties":[{"$class":"concerto.metamodel@1.0.0.DoubleProperty","name":"mileage","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":73,"line":6,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":90,"line":7,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":41,"line":5,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":91,"line":7,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}},"superType":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Vehicle"}}]}]}
\ No newline at end of file
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diff --git a/packages/concerto-cto/test/external/car.json.resolved b/packages/concerto-cto/test/external/car.json.resolved
index 6aa1709a3b..c5c4a85ef5 100644
--- a/packages/concerto-cto/test/external/car.json.resolved
+++ b/packages/concerto-cto/test/external/car.json.resolved
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diff --git a/packages/concerto-cto/test/external/person.json b/packages/concerto-cto/test/external/person.json
index 9c9bc486d2..aefdd40959 100644
--- a/packages/concerto-cto/test/external/person.json
+++ b/packages/concerto-cto/test/external/person.json
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diff --git a/packages/concerto-cto/test/external/person.json.resolved b/packages/concerto-cto/test/external/person.json.resolved
index 9c9bc486d2..aefdd40959 100644
--- a/packages/concerto-cto/test/external/person.json.resolved
+++ b/packages/concerto-cto/test/external/person.json.resolved
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2,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":1308,"line":83,"column":3,"$class":"concerto.metamodel@1.0.0.Position"}}},{"$class":"concerto.metamodel@1.0.0.ObjectProperty","name":"unit","type":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"PeriodUnit"},"isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":1308,"line":83,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":1326,"line":84,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":1273,"line":81,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":1327,"line":84,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}}}]}]}
diff --git a/packages/concerto-cto/test/printer.js b/packages/concerto-cto/test/printer.js
index 0b1cc7a1c0..9d4df24139 100644
--- a/packages/concerto-cto/test/printer.js
+++ b/packages/concerto-cto/test/printer.js
@@ -35,7 +35,7 @@ function getCTOFiles() {
     files.forEach(function(file) {
         if(file.endsWith('.json') && !file.endsWith('.no-location.json')) {
             const ctoFile = file.split('.').slice(0, -1).join('.') + '.cto';
-            const content = fs.readFileSync('./test/cto/' + ctoFile, 'utf8');
+            const content = fs.readFileSync('./test/cto/' + ctoFile, 'utf8').trimEnd();
             const ast = fs.readFileSync('./test/cto/' + file, 'utf8');
             result.push({file, content, ast});
         }
@@ -47,7 +47,7 @@ function getCTOFiles() {
 describe('parser', () => {
     getCTOFiles().forEach(({ file, content, ast }) => {
         it(`Should print ${file}`, () => {
-            const cto = Printer.toCTO(JSON.parse(ast));
+            const cto = Printer.toCTO(JSON.parse(ast)).trimEnd();
             cto.should.equal(content);
         });
     });
diff --git a/packages/concerto-metamodel/lib/metamodel.json b/packages/concerto-metamodel/lib/metamodel.json
index 5f03e88fd7..39d346e943 100644
--- a/packages/concerto-metamodel/lib/metamodel.json
+++ b/packages/concerto-metamodel/lib/metamodel.json
@@ -1,5 +1,6 @@
 {
     "$class": "concerto.metamodel@1.0.0.Model",
+    "decorators": [],
     "namespace": "concerto.metamodel@1.0.0",
     "imports": [],
     "declarations": [
@@ -833,6 +834,16 @@
                     },
                     "isArray": true,
                     "isOptional": true
+                },
+                {
+                    "$class": "concerto.metamodel@1.0.0.ObjectProperty",
+                    "name": "decorators",
+                    "type": {
+                        "$class": "concerto.metamodel@1.0.0.TypeIdentifier",
+                        "name": "Decorator"
+                    },
+                    "isArray": true,
+                    "isOptional": true
                 }
             ]
         },
diff --git a/packages/concerto-metamodel/lib/metamodelutil.js b/packages/concerto-metamodel/lib/metamodelutil.js
index 2f26158ac3..c1b2a5427a 100644
--- a/packages/concerto-metamodel/lib/metamodelutil.js
+++ b/packages/concerto-metamodel/lib/metamodelutil.js
@@ -200,6 +200,7 @@ concept Model {
   o String concertoVersion optional
   o Import[] imports optional
   o Declaration[] declarations optional
+  o Decorator[] decorators optional
 }
 
 concept Models {
diff --git a/packages/concerto-metamodel/test/cto/car.json b/packages/concerto-metamodel/test/cto/car.json
index 6aa1709a3b..c5c4a85ef5 100644
--- a/packages/concerto-metamodel/test/cto/car.json
+++ b/packages/concerto-metamodel/test/cto/car.json
@@ -1 +1 @@
-{"$class":"concerto.metamodel@1.0.0.Models","models":[{"$class":"concerto.metamodel@1.0.0.Model","namespace":"org.vehicle","imports":[],"declarations":[{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"Manufactured","isAbstract":true,"properties":[],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":23,"line":3,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":56,"line":4,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}}},{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"Vehicle","isAbstract":true,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"name","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":108,"line":7,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":124,"line":8,"column":3,"$class":"concerto.metamodel@1.0.0.Position"}}},{"$class":"concerto.metamodel@1.0.0.DoubleProperty","name":"range","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":124,"line":8,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":139,"line":9,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":58,"line":6,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":140,"line":9,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}},"superType":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Manufactured"}}]},{"$class":"concerto.metamodel@1.0.0.Model","namespace":"org.car","imports":[{"$class":"concerto.metamodel@1.0.0.ImportAll","namespace":"org.vehicle"}],"declarations":[{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"Car","isAbstract":false,"properties":[{"$class":"concerto.metamodel@1.0.0.DoubleProperty","name":"mileage","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":73,"line":6,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":90,"line":7,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":41,"line":5,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":91,"line":7,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}},"superType":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Vehicle"}}]}]}
\ No newline at end of file
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diff --git a/packages/concerto-metamodel/test/cto/carResolved.json b/packages/concerto-metamodel/test/cto/carResolved.json
index 3e3510129a..667973508c 100644
--- a/packages/concerto-metamodel/test/cto/carResolved.json
+++ b/packages/concerto-metamodel/test/cto/carResolved.json
@@ -1 +1 @@
-{"$class":"concerto.metamodel@1.0.0.Models","models":[{"$class":"concerto.metamodel@1.0.0.Model","namespace":"org.vehicle","imports":[],"declarations":[{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"Manufactured","isAbstract":true,"properties":[],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":23,"line":3,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":56,"line":4,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}}},{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"Vehicle","isAbstract":true,"properties":[{"$class":"concerto.metamodel@1.0.0.StringProperty","name":"name","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":108,"line":7,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":124,"line":8,"column":3,"$class":"concerto.metamodel@1.0.0.Position"}}},{"$class":"concerto.metamodel@1.0.0.DoubleProperty","name":"range","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":124,"line":8,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":139,"line":9,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":58,"line":6,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":140,"line":9,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}},"superType":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Manufactured","namespace":"org.vehicle"}}]},{"$class":"concerto.metamodel@1.0.0.Model","namespace":"org.car","imports":[{"$class":"concerto.metamodel@1.0.0.ImportAll","namespace":"org.vehicle"}],"declarations":[{"$class":"concerto.metamodel@1.0.0.ConceptDeclaration","name":"Car","isAbstract":false,"properties":[{"$class":"concerto.metamodel@1.0.0.DoubleProperty","name":"mileage","isArray":false,"isOptional":false,"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":73,"line":6,"column":3,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":90,"line":7,"column":1,"$class":"concerto.metamodel@1.0.0.Position"}}}],"location":{"$class":"concerto.metamodel@1.0.0.Range","start":{"offset":41,"line":5,"column":1,"$class":"concerto.metamodel@1.0.0.Position"},"end":{"offset":91,"line":7,"column":2,"$class":"concerto.metamodel@1.0.0.Position"}},"superType":{"$class":"concerto.metamodel@1.0.0.TypeIdentifier","name":"Vehicle","namespace":"org.vehicle"}}]}]}
\ No newline at end of file
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diff --git a/packages/concerto-metamodel/test/cto/carWrongExtends.json b/packages/concerto-metamodel/test/cto/carWrongExtends.json
index 1e6735e0d7..bd685ac1da 100644
--- a/packages/concerto-metamodel/test/cto/carWrongExtends.json
+++ b/packages/concerto-metamodel/test/cto/carWrongExtends.json
@@ -1 +1 @@
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\ No newline at end of file
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diff --git a/packages/concerto-metamodel/test/cto/carWrongImport.json b/packages/concerto-metamodel/test/cto/carWrongImport.json
index c952bfe2d2..ff35b33e7e 100644
--- a/packages/concerto-metamodel/test/cto/carWrongImport.json
+++ b/packages/concerto-metamodel/test/cto/carWrongImport.json
@@ -1 +1 @@
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\ No newline at end of file
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diff --git a/packages/concerto-metamodel/test/cto/empty.json b/packages/concerto-metamodel/test/cto/empty.json
index 3524c4b08e..2983369452 100644
--- a/packages/concerto-metamodel/test/cto/empty.json
+++ b/packages/concerto-metamodel/test/cto/empty.json
@@ -1 +1 @@
-{"$class":"concerto.metamodel@1.0.0.Model","namespace":"test.empty","imports":[],"declarations":[]}
\ No newline at end of file
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diff --git a/packages/concerto-metamodel/test/cto/emptyResolved.json b/packages/concerto-metamodel/test/cto/emptyResolved.json
index 3524c4b08e..2983369452 100644
--- a/packages/concerto-metamodel/test/cto/emptyResolved.json
+++ b/packages/concerto-metamodel/test/cto/emptyResolved.json
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\ No newline at end of file
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diff --git a/packages/concerto-metamodel/test/cto/person.json b/packages/concerto-metamodel/test/cto/person.json
index c72f58f08b..584624ee3f 100644
--- a/packages/concerto-metamodel/test/cto/person.json
+++ b/packages/concerto-metamodel/test/cto/person.json
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diff --git a/packages/concerto-metamodel/test/cto/personResolved.json b/packages/concerto-metamodel/test/cto/personResolved.json
index ace2566610..806e8f1b5c 100644
--- a/packages/concerto-metamodel/test/cto/personResolved.json
+++ b/packages/concerto-metamodel/test/cto/personResolved.json
@@ -1,5 +1,6 @@
 {
     "$class": "concerto.metamodel@1.0.0.Model",
+    "decorators": [],
     "namespace": "test.person",
     "imports": [
         {
@@ -1456,4 +1457,4 @@
             }
         }
     ]
-}
\ No newline at end of file
+}