diff --git a/lib/metamodel.cto b/lib/metamodel.cto
index f707810..dafe34e 100644
--- a/lib/metamodel.cto
+++ b/lib/metamodel.cto
@@ -82,9 +82,14 @@ abstract concept MapValueType {
   o Range location optional
 }
 
+concept MapKeyCountValidator {
+  o Integer maxKeys
+}
+
 concept MapDeclaration extends Declaration {
   o MapKeyType key
   o MapValueType value
+  o MapKeyCountValidator maxKeysValidator optional
 }
 
 concept StringMapKeyType extends MapKeyType {}
diff --git a/lib/metamodel.js b/lib/metamodel.js
index aa0731b..7e071ca 100644
--- a/lib/metamodel.js
+++ b/lib/metamodel.js
@@ -19,6 +19,6 @@
 /**
  * The metamodel itself, as a CTO string
  */
-const metaModelCto = "/*\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n@DotNetNamespace(\"AccordProject.Concerto.Metamodel\")\nnamespace concerto.metamodel@1.0.0\n\nconcept Position {\n  o Integer line\n  o Integer column\n  o Integer offset\n}\n\nconcept Range {\n  o Position start\n  o Position end\n  o String source optional\n}\n\nconcept TypeIdentifier {\n  o String name\n  o String namespace optional\n}\n\nabstract concept DecoratorLiteral {\n  o Range location optional\n}\n\nconcept DecoratorString extends DecoratorLiteral {\n  o String value\n}\n\nconcept DecoratorNumber extends DecoratorLiteral {\n  o Double value\n}\n\nconcept DecoratorBoolean extends DecoratorLiteral {\n  o Boolean value\n}\n\nconcept DecoratorTypeReference extends DecoratorLiteral {\n  o TypeIdentifier type\n  o Boolean isArray default=false\n}\n\nconcept Decorator {\n  o String name\n  o DecoratorLiteral[] arguments optional\n  o Range location optional\n}\n\nconcept Identified {\n}\n\nconcept IdentifiedBy extends Identified {\n  o String name\n}\n\nabstract concept Declaration {\n  o String name regex=/^(\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4})(?:\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4}|\\p{Mn}|\\p{Mc}|\\p{Nd}|\\p{Pc}|\\u200C|\\u200D)*$/u\n  o Decorator[] decorators optional\n  o Range location optional\n}\n\nabstract concept MapKeyType {\n  o Decorator[] decorators optional\n  o Range location optional\n}\n\nabstract concept MapValueType {\n  o Decorator[] decorators optional\n  o Range location optional\n}\n\nconcept MapDeclaration extends Declaration {\n  o MapKeyType key\n  o MapValueType value\n}\n\nconcept StringMapKeyType extends MapKeyType {}\nconcept DateTimeMapKeyType extends MapKeyType {}\n\nconcept ObjectMapKeyType extends MapKeyType {\n  o TypeIdentifier type\n}\n\nconcept BooleanMapValueType extends MapValueType {}\nconcept DateTimeMapValueType extends MapValueType {}\nconcept StringMapValueType extends MapValueType {}\nconcept IntegerMapValueType extends MapValueType {}\nconcept LongMapValueType extends MapValueType {}\nconcept DoubleMapValueType extends MapValueType {}\n\nconcept ObjectMapValueType extends MapValueType {\n  o TypeIdentifier type\n}\n\nconcept RelationshipMapValueType extends MapValueType {\n  o TypeIdentifier type\n}\n\nconcept EnumDeclaration extends Declaration {\n  o EnumProperty[] properties\n}\n\nconcept EnumProperty {\n  o String name regex=/^(\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4})(?:\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4}|\\p{Mn}|\\p{Mc}|\\p{Nd}|\\p{Pc}|\\u200C|\\u200D)*$/u\n  o Decorator[] decorators optional\n  o Range location optional\n}\n\nconcept ConceptDeclaration extends Declaration {\n  o Boolean isAbstract default=false\n  o Identified identified optional\n  o TypeIdentifier superType optional\n  o Property[] properties\n}\n\nconcept AssetDeclaration extends ConceptDeclaration {\n}\n\nconcept ParticipantDeclaration extends ConceptDeclaration {\n}\n\nconcept TransactionDeclaration extends ConceptDeclaration {\n}\n\nconcept EventDeclaration extends ConceptDeclaration {\n}\n\nabstract concept Property {\n  o String name regex=/^(\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4})(?:\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4}|\\p{Mn}|\\p{Mc}|\\p{Nd}|\\p{Pc}|\\u200C|\\u200D)*$/u\n  o Boolean isArray default=false\n  o Boolean isOptional default=false\n  o Decorator[] decorators optional\n  o Range location optional\n}\n\nconcept RelationshipProperty extends Property {\n  o TypeIdentifier type\n}\n\nconcept ObjectProperty extends Property {\n  o String defaultValue optional\n  o TypeIdentifier type\n}\n\nconcept BooleanProperty extends Property {\n  o Boolean defaultValue optional\n}\n\nconcept DateTimeProperty extends Property {\n}\n\nconcept StringProperty extends Property {\n  o String defaultValue optional\n  o StringRegexValidator validator optional\n  o StringLengthValidator lengthValidator optional\n}\n\nconcept StringRegexValidator {\n  o String pattern\n  o String flags\n}\n\nconcept StringLengthValidator {\n  o Integer minLength optional\n  o Integer maxLength optional\n}\n\nconcept DoubleProperty extends Property {\n  o Double defaultValue optional\n  o DoubleDomainValidator validator optional\n}\n\nconcept DoubleDomainValidator {\n  o Double lower optional\n  o Double upper optional\n}\n\nconcept IntegerProperty extends Property {\n  o Integer defaultValue optional\n  o IntegerDomainValidator validator optional\n}\n\nconcept IntegerDomainValidator {\n  o Integer lower optional\n  o Integer upper optional\n}\n\nconcept LongProperty extends Property {\n  o Long defaultValue optional\n  o LongDomainValidator validator optional\n}\n\nconcept LongDomainValidator {\n  o Long lower optional\n  o Long upper optional\n}\n\nconcept AliasedType{\n  o String name\n  o String aliasedName\n}\nabstract concept Import {\n  o String namespace\n  o String uri optional\n}\n\nconcept ImportAll extends Import {\n}\n\nconcept ImportType extends Import {\n  o String name\n}\n\nconcept ImportTypes extends Import {\n  o String[] types\n  o AliasedType[] aliasedTypes optional\n}\n\nconcept Model {\n  o String namespace\n  o String sourceUri optional\n  o String concertoVersion optional\n  o Import[] imports optional\n  o Declaration[] declarations optional\n  o Decorator[] decorators optional\n}\n\nconcept Models {\n  o Model[] models\n}\n\nabstract concept ScalarDeclaration extends Declaration {\n}\n\nconcept BooleanScalar extends ScalarDeclaration {\n  o Boolean defaultValue optional\n}\n\nconcept IntegerScalar extends ScalarDeclaration {\n  o Integer defaultValue optional\n  o IntegerDomainValidator validator optional\n}\n\nconcept LongScalar extends ScalarDeclaration {\n  o Long defaultValue optional\n  o LongDomainValidator validator optional\n}\n\nconcept DoubleScalar extends ScalarDeclaration {\n  o Double defaultValue optional\n  o DoubleDomainValidator validator optional\n}\n\nconcept StringScalar extends ScalarDeclaration {\n  o String defaultValue optional\n  o StringRegexValidator validator optional\n  o StringLengthValidator lengthValidator optional\n}\n\nconcept DateTimeScalar extends ScalarDeclaration {\n  o String defaultValue optional\n}\n";
+const metaModelCto = "/*\r\n * Licensed under the Apache License, Version 2.0 (the \"License\");\r\n * you may not use this file except in compliance with the License.\r\n * You may obtain a copy of the License at\r\n *\r\n * http://www.apache.org/licenses/LICENSE-2.0\r\n *\r\n * Unless required by applicable law or agreed to in writing, software\r\n * distributed under the License is distributed on an \"AS IS\" BASIS,\r\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r\n * See the License for the specific language governing permissions and\r\n * limitations under the License.\r\n */\r\n\r\n@DotNetNamespace(\"AccordProject.Concerto.Metamodel\")\r\nnamespace concerto.metamodel@1.0.0\r\n\r\nconcept Position {\r\n  o Integer line\r\n  o Integer column\r\n  o Integer offset\r\n}\r\n\r\nconcept Range {\r\n  o Position start\r\n  o Position end\r\n  o String source optional\r\n}\r\n\r\nconcept TypeIdentifier {\r\n  o String name\r\n  o String namespace optional\r\n}\r\n\r\nabstract concept DecoratorLiteral {\r\n  o Range location optional\r\n}\r\n\r\nconcept DecoratorString extends DecoratorLiteral {\r\n  o String value\r\n}\r\n\r\nconcept DecoratorNumber extends DecoratorLiteral {\r\n  o Double value\r\n}\r\n\r\nconcept DecoratorBoolean extends DecoratorLiteral {\r\n  o Boolean value\r\n}\r\n\r\nconcept DecoratorTypeReference extends DecoratorLiteral {\r\n  o TypeIdentifier type\r\n  o Boolean isArray default=false\r\n}\r\n\r\nconcept Decorator {\r\n  o String name\r\n  o DecoratorLiteral[] arguments optional\r\n  o Range location optional\r\n}\r\n\r\nconcept Identified {\r\n}\r\n\r\nconcept IdentifiedBy extends Identified {\r\n  o String name\r\n}\r\n\r\nabstract concept Declaration {\r\n  o String name regex=/^(\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4})(?:\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4}|\\p{Mn}|\\p{Mc}|\\p{Nd}|\\p{Pc}|\\u200C|\\u200D)*$/u\r\n  o Decorator[] decorators optional\r\n  o Range location optional\r\n}\r\n\r\nabstract concept MapKeyType {\r\n  o Decorator[] decorators optional\r\n  o Range location optional\r\n}\r\n\r\nabstract concept MapValueType {\r\n  o Decorator[] decorators optional\r\n  o Range location optional\r\n}\r\n\r\nconcept MapKeyCountValidator {\r\n  o Integer maxKeys\r\n}\r\n\r\nconcept MapDeclaration extends Declaration {\r\n  o MapKeyType key\r\n  o MapValueType value\r\n  o MapKeyCountValidator maxKeysValidator optional\r\n}\r\n\r\nconcept StringMapKeyType extends MapKeyType {}\r\nconcept DateTimeMapKeyType extends MapKeyType {}\r\n\r\nconcept ObjectMapKeyType extends MapKeyType {\r\n  o TypeIdentifier type\r\n}\r\n\r\nconcept BooleanMapValueType extends MapValueType {}\r\nconcept DateTimeMapValueType extends MapValueType {}\r\nconcept StringMapValueType extends MapValueType {}\r\nconcept IntegerMapValueType extends MapValueType {}\r\nconcept LongMapValueType extends MapValueType {}\r\nconcept DoubleMapValueType extends MapValueType {}\r\n\r\nconcept ObjectMapValueType extends MapValueType {\r\n  o TypeIdentifier type\r\n}\r\n\r\nconcept RelationshipMapValueType extends MapValueType {\r\n  o TypeIdentifier type\r\n}\r\n\r\nconcept EnumDeclaration extends Declaration {\r\n  o EnumProperty[] properties\r\n}\r\n\r\nconcept EnumProperty {\r\n  o String name regex=/^(\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4})(?:\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4}|\\p{Mn}|\\p{Mc}|\\p{Nd}|\\p{Pc}|\\u200C|\\u200D)*$/u\r\n  o Decorator[] decorators optional\r\n  o Range location optional\r\n}\r\n\r\nconcept ConceptDeclaration extends Declaration {\r\n  o Boolean isAbstract default=false\r\n  o Identified identified optional\r\n  o TypeIdentifier superType optional\r\n  o Property[] properties\r\n}\r\n\r\nconcept AssetDeclaration extends ConceptDeclaration {\r\n}\r\n\r\nconcept ParticipantDeclaration extends ConceptDeclaration {\r\n}\r\n\r\nconcept TransactionDeclaration extends ConceptDeclaration {\r\n}\r\n\r\nconcept EventDeclaration extends ConceptDeclaration {\r\n}\r\n\r\nabstract concept Property {\r\n  o String name regex=/^(\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4})(?:\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4}|\\p{Mn}|\\p{Mc}|\\p{Nd}|\\p{Pc}|\\u200C|\\u200D)*$/u\r\n  o Boolean isArray default=false\r\n  o Boolean isOptional default=false\r\n  o Decorator[] decorators optional\r\n  o Range location optional\r\n}\r\n\r\nconcept RelationshipProperty extends Property {\r\n  o TypeIdentifier type\r\n}\r\n\r\nconcept ObjectProperty extends Property {\r\n  o String defaultValue optional\r\n  o TypeIdentifier type\r\n}\r\n\r\nconcept BooleanProperty extends Property {\r\n  o Boolean defaultValue optional\r\n}\r\n\r\nconcept DateTimeProperty extends Property {\r\n}\r\n\r\nconcept StringProperty extends Property {\r\n  o String defaultValue optional\r\n  o StringRegexValidator validator optional\r\n  o StringLengthValidator lengthValidator optional\r\n}\r\n\r\nconcept StringRegexValidator {\r\n  o String pattern\r\n  o String flags\r\n}\r\n\r\nconcept StringLengthValidator {\r\n  o Integer minLength optional\r\n  o Integer maxLength optional\r\n}\r\n\r\nconcept DoubleProperty extends Property {\r\n  o Double defaultValue optional\r\n  o DoubleDomainValidator validator optional\r\n}\r\n\r\nconcept DoubleDomainValidator {\r\n  o Double lower optional\r\n  o Double upper optional\r\n}\r\n\r\nconcept IntegerProperty extends Property {\r\n  o Integer defaultValue optional\r\n  o IntegerDomainValidator validator optional\r\n}\r\n\r\nconcept IntegerDomainValidator {\r\n  o Integer lower optional\r\n  o Integer upper optional\r\n}\r\n\r\nconcept LongProperty extends Property {\r\n  o Long defaultValue optional\r\n  o LongDomainValidator validator optional\r\n}\r\n\r\nconcept LongDomainValidator {\r\n  o Long lower optional\r\n  o Long upper optional\r\n}\r\n\r\nconcept AliasedType{\r\n  o String name\r\n  o String aliasedName\r\n}\r\nabstract concept Import {\r\n  o String namespace\r\n  o String uri optional\r\n}\r\n\r\nconcept ImportAll extends Import {\r\n}\r\n\r\nconcept ImportType extends Import {\r\n  o String name\r\n}\r\n\r\nconcept ImportTypes extends Import {\r\n  o String[] types\r\n  o AliasedType[] aliasedTypes optional\r\n}\r\n\r\nconcept Model {\r\n  o String namespace\r\n  o String sourceUri optional\r\n  o String concertoVersion optional\r\n  o Import[] imports optional\r\n  o Declaration[] declarations optional\r\n  o Decorator[] decorators optional\r\n}\r\n\r\nconcept Models {\r\n  o Model[] models\r\n}\r\n\r\nabstract concept ScalarDeclaration extends Declaration {\r\n}\r\n\r\nconcept BooleanScalar extends ScalarDeclaration {\r\n  o Boolean defaultValue optional\r\n}\r\n\r\nconcept IntegerScalar extends ScalarDeclaration {\r\n  o Integer defaultValue optional\r\n  o IntegerDomainValidator validator optional\r\n}\r\n\r\nconcept LongScalar extends ScalarDeclaration {\r\n  o Long defaultValue optional\r\n  o LongDomainValidator validator optional\r\n}\r\n\r\nconcept DoubleScalar extends ScalarDeclaration {\r\n  o Double defaultValue optional\r\n  o DoubleDomainValidator validator optional\r\n}\r\n\r\nconcept StringScalar extends ScalarDeclaration {\r\n  o String defaultValue optional\r\n  o StringRegexValidator validator optional\r\n  o StringLengthValidator lengthValidator optional\r\n}\r\n\r\nconcept DateTimeScalar extends ScalarDeclaration {\r\n  o String defaultValue optional\r\n}\r\n";
 
 module.exports = metaModelCto;
diff --git a/lib/metamodel.json b/lib/metamodel.json
index 379fb57..4856d2d 100644
--- a/lib/metamodel.json
+++ b/lib/metamodel.json
@@ -336,6 +336,17 @@
         }
       ]
     },
+    {
+      "$class": "concerto.metamodel@1.0.0.ConceptDeclaration",
+      "name": "MapKeyCountValidator",
+      "isAbstract": false,
+      "properties": [{
+          "$class": "concerto.metamodel@1.0.0.IntegerProperty",
+          "name": "maxKeys",
+          "isArray": false,
+          "isOptional": false
+      }]
+    },
     {
       "$class": "concerto.metamodel@1.0.0.ConceptDeclaration",
       "name": "MapDeclaration",
@@ -360,6 +371,16 @@
           },
           "isArray": false,
           "isOptional": false
+        },
+        {
+          "$class": "concerto.metamodel@1.0.0.ObjectProperty",
+          "name": "maxKeysValidator",
+          "type": {
+              "$class": "concerto.metamodel@1.0.0.TypeIdentifier",
+              "name": "MapKeyCountValidator"
+          },
+          "isArray": false,
+          "isOptional": true
         }
       ],
       "superType": {
diff --git a/types/lib/metamodel.d.ts b/types/lib/metamodel.d.ts
index 6a0f262..4055673 100644
--- a/types/lib/metamodel.d.ts
+++ b/types/lib/metamodel.d.ts
@@ -2,4 +2,4 @@ export = metaModelCto;
 /**
  * The metamodel itself, as a CTO string
  */
-declare const metaModelCto: "/*\n * Licensed under the Apache License, Version 2.0 (the \"License\");\n * you may not use this file except in compliance with the License.\n * You may obtain a copy of the License at\n *\n * http://www.apache.org/licenses/LICENSE-2.0\n *\n * Unless required by applicable law or agreed to in writing, software\n * distributed under the License is distributed on an \"AS IS\" BASIS,\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n * See the License for the specific language governing permissions and\n * limitations under the License.\n */\n\n@DotNetNamespace(\"AccordProject.Concerto.Metamodel\")\nnamespace concerto.metamodel@1.0.0\n\nconcept Position {\n  o Integer line\n  o Integer column\n  o Integer offset\n}\n\nconcept Range {\n  o Position start\n  o Position end\n  o String source optional\n}\n\nconcept TypeIdentifier {\n  o String name\n  o String namespace optional\n}\n\nabstract concept DecoratorLiteral {\n  o Range location optional\n}\n\nconcept DecoratorString extends DecoratorLiteral {\n  o String value\n}\n\nconcept DecoratorNumber extends DecoratorLiteral {\n  o Double value\n}\n\nconcept DecoratorBoolean extends DecoratorLiteral {\n  o Boolean value\n}\n\nconcept DecoratorTypeReference extends DecoratorLiteral {\n  o TypeIdentifier type\n  o Boolean isArray default=false\n}\n\nconcept Decorator {\n  o String name\n  o DecoratorLiteral[] arguments optional\n  o Range location optional\n}\n\nconcept Identified {\n}\n\nconcept IdentifiedBy extends Identified {\n  o String name\n}\n\nabstract concept Declaration {\n  o String name regex=/^(\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4})(?:\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4}|\\p{Mn}|\\p{Mc}|\\p{Nd}|\\p{Pc}|\\u200C|\\u200D)*$/u\n  o Decorator[] decorators optional\n  o Range location optional\n}\n\nabstract concept MapKeyType {\n  o Decorator[] decorators optional\n  o Range location optional\n}\n\nabstract concept MapValueType {\n  o Decorator[] decorators optional\n  o Range location optional\n}\n\nconcept MapDeclaration extends Declaration {\n  o MapKeyType key\n  o MapValueType value\n}\n\nconcept StringMapKeyType extends MapKeyType {}\nconcept DateTimeMapKeyType extends MapKeyType {}\n\nconcept ObjectMapKeyType extends MapKeyType {\n  o TypeIdentifier type\n}\n\nconcept BooleanMapValueType extends MapValueType {}\nconcept DateTimeMapValueType extends MapValueType {}\nconcept StringMapValueType extends MapValueType {}\nconcept IntegerMapValueType extends MapValueType {}\nconcept LongMapValueType extends MapValueType {}\nconcept DoubleMapValueType extends MapValueType {}\n\nconcept ObjectMapValueType extends MapValueType {\n  o TypeIdentifier type\n}\n\nconcept RelationshipMapValueType extends MapValueType {\n  o TypeIdentifier type\n}\n\nconcept EnumDeclaration extends Declaration {\n  o EnumProperty[] properties\n}\n\nconcept EnumProperty {\n  o String name regex=/^(\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4})(?:\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4}|\\p{Mn}|\\p{Mc}|\\p{Nd}|\\p{Pc}|\\u200C|\\u200D)*$/u\n  o Decorator[] decorators optional\n  o Range location optional\n}\n\nconcept ConceptDeclaration extends Declaration {\n  o Boolean isAbstract default=false\n  o Identified identified optional\n  o TypeIdentifier superType optional\n  o Property[] properties\n}\n\nconcept AssetDeclaration extends ConceptDeclaration {\n}\n\nconcept ParticipantDeclaration extends ConceptDeclaration {\n}\n\nconcept TransactionDeclaration extends ConceptDeclaration {\n}\n\nconcept EventDeclaration extends ConceptDeclaration {\n}\n\nabstract concept Property {\n  o String name regex=/^(\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4})(?:\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4}|\\p{Mn}|\\p{Mc}|\\p{Nd}|\\p{Pc}|\\u200C|\\u200D)*$/u\n  o Boolean isArray default=false\n  o Boolean isOptional default=false\n  o Decorator[] decorators optional\n  o Range location optional\n}\n\nconcept RelationshipProperty extends Property {\n  o TypeIdentifier type\n}\n\nconcept ObjectProperty extends Property {\n  o String defaultValue optional\n  o TypeIdentifier type\n}\n\nconcept BooleanProperty extends Property {\n  o Boolean defaultValue optional\n}\n\nconcept DateTimeProperty extends Property {\n}\n\nconcept StringProperty extends Property {\n  o String defaultValue optional\n  o StringRegexValidator validator optional\n  o StringLengthValidator lengthValidator optional\n}\n\nconcept StringRegexValidator {\n  o String pattern\n  o String flags\n}\n\nconcept StringLengthValidator {\n  o Integer minLength optional\n  o Integer maxLength optional\n}\n\nconcept DoubleProperty extends Property {\n  o Double defaultValue optional\n  o DoubleDomainValidator validator optional\n}\n\nconcept DoubleDomainValidator {\n  o Double lower optional\n  o Double upper optional\n}\n\nconcept IntegerProperty extends Property {\n  o Integer defaultValue optional\n  o IntegerDomainValidator validator optional\n}\n\nconcept IntegerDomainValidator {\n  o Integer lower optional\n  o Integer upper optional\n}\n\nconcept LongProperty extends Property {\n  o Long defaultValue optional\n  o LongDomainValidator validator optional\n}\n\nconcept LongDomainValidator {\n  o Long lower optional\n  o Long upper optional\n}\n\nconcept AliasedType{\n  o String name\n  o String aliasedName\n}\nabstract concept Import {\n  o String namespace\n  o String uri optional\n}\n\nconcept ImportAll extends Import {\n}\n\nconcept ImportType extends Import {\n  o String name\n}\n\nconcept ImportTypes extends Import {\n  o String[] types\n  o AliasedType[] aliasedTypes optional\n}\n\nconcept Model {\n  o String namespace\n  o String sourceUri optional\n  o String concertoVersion optional\n  o Import[] imports optional\n  o Declaration[] declarations optional\n  o Decorator[] decorators optional\n}\n\nconcept Models {\n  o Model[] models\n}\n\nabstract concept ScalarDeclaration extends Declaration {\n}\n\nconcept BooleanScalar extends ScalarDeclaration {\n  o Boolean defaultValue optional\n}\n\nconcept IntegerScalar extends ScalarDeclaration {\n  o Integer defaultValue optional\n  o IntegerDomainValidator validator optional\n}\n\nconcept LongScalar extends ScalarDeclaration {\n  o Long defaultValue optional\n  o LongDomainValidator validator optional\n}\n\nconcept DoubleScalar extends ScalarDeclaration {\n  o Double defaultValue optional\n  o DoubleDomainValidator validator optional\n}\n\nconcept StringScalar extends ScalarDeclaration {\n  o String defaultValue optional\n  o StringRegexValidator validator optional\n  o StringLengthValidator lengthValidator optional\n}\n\nconcept DateTimeScalar extends ScalarDeclaration {\n  o String defaultValue optional\n}\n";
+declare const metaModelCto: "/*\r\n * Licensed under the Apache License, Version 2.0 (the \"License\");\r\n * you may not use this file except in compliance with the License.\r\n * You may obtain a copy of the License at\r\n *\r\n * http://www.apache.org/licenses/LICENSE-2.0\r\n *\r\n * Unless required by applicable law or agreed to in writing, software\r\n * distributed under the License is distributed on an \"AS IS\" BASIS,\r\n * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\r\n * See the License for the specific language governing permissions and\r\n * limitations under the License.\r\n */\r\n\r\n@DotNetNamespace(\"AccordProject.Concerto.Metamodel\")\r\nnamespace concerto.metamodel@1.0.0\r\n\r\nconcept Position {\r\n  o Integer line\r\n  o Integer column\r\n  o Integer offset\r\n}\r\n\r\nconcept Range {\r\n  o Position start\r\n  o Position end\r\n  o String source optional\r\n}\r\n\r\nconcept TypeIdentifier {\r\n  o String name\r\n  o String namespace optional\r\n}\r\n\r\nabstract concept DecoratorLiteral {\r\n  o Range location optional\r\n}\r\n\r\nconcept DecoratorString extends DecoratorLiteral {\r\n  o String value\r\n}\r\n\r\nconcept DecoratorNumber extends DecoratorLiteral {\r\n  o Double value\r\n}\r\n\r\nconcept DecoratorBoolean extends DecoratorLiteral {\r\n  o Boolean value\r\n}\r\n\r\nconcept DecoratorTypeReference extends DecoratorLiteral {\r\n  o TypeIdentifier type\r\n  o Boolean isArray default=false\r\n}\r\n\r\nconcept Decorator {\r\n  o String name\r\n  o DecoratorLiteral[] arguments optional\r\n  o Range location optional\r\n}\r\n\r\nconcept Identified {\r\n}\r\n\r\nconcept IdentifiedBy extends Identified {\r\n  o String name\r\n}\r\n\r\nabstract concept Declaration {\r\n  o String name regex=/^(\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4})(?:\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4}|\\p{Mn}|\\p{Mc}|\\p{Nd}|\\p{Pc}|\\u200C|\\u200D)*$/u\r\n  o Decorator[] decorators optional\r\n  o Range location optional\r\n}\r\n\r\nabstract concept MapKeyType {\r\n  o Decorator[] decorators optional\r\n  o Range location optional\r\n}\r\n\r\nabstract concept MapValueType {\r\n  o Decorator[] decorators optional\r\n  o Range location optional\r\n}\r\n\r\nconcept MapKeyCountValidator {\r\n  o Integer maxKeys\r\n}\r\n\r\nconcept MapDeclaration extends Declaration {\r\n  o MapKeyType key\r\n  o MapValueType value\r\n  o MapKeyCountValidator maxKeysValidator optional\r\n}\r\n\r\nconcept StringMapKeyType extends MapKeyType {}\r\nconcept DateTimeMapKeyType extends MapKeyType {}\r\n\r\nconcept ObjectMapKeyType extends MapKeyType {\r\n  o TypeIdentifier type\r\n}\r\n\r\nconcept BooleanMapValueType extends MapValueType {}\r\nconcept DateTimeMapValueType extends MapValueType {}\r\nconcept StringMapValueType extends MapValueType {}\r\nconcept IntegerMapValueType extends MapValueType {}\r\nconcept LongMapValueType extends MapValueType {}\r\nconcept DoubleMapValueType extends MapValueType {}\r\n\r\nconcept ObjectMapValueType extends MapValueType {\r\n  o TypeIdentifier type\r\n}\r\n\r\nconcept RelationshipMapValueType extends MapValueType {\r\n  o TypeIdentifier type\r\n}\r\n\r\nconcept EnumDeclaration extends Declaration {\r\n  o EnumProperty[] properties\r\n}\r\n\r\nconcept EnumProperty {\r\n  o String name regex=/^(\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4})(?:\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4}|\\p{Mn}|\\p{Mc}|\\p{Nd}|\\p{Pc}|\\u200C|\\u200D)*$/u\r\n  o Decorator[] decorators optional\r\n  o Range location optional\r\n}\r\n\r\nconcept ConceptDeclaration extends Declaration {\r\n  o Boolean isAbstract default=false\r\n  o Identified identified optional\r\n  o TypeIdentifier superType optional\r\n  o Property[] properties\r\n}\r\n\r\nconcept AssetDeclaration extends ConceptDeclaration {\r\n}\r\n\r\nconcept ParticipantDeclaration extends ConceptDeclaration {\r\n}\r\n\r\nconcept TransactionDeclaration extends ConceptDeclaration {\r\n}\r\n\r\nconcept EventDeclaration extends ConceptDeclaration {\r\n}\r\n\r\nabstract concept Property {\r\n  o String name regex=/^(\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4})(?:\\p{Lu}|\\p{Ll}|\\p{Lt}|\\p{Lm}|\\p{Lo}|\\p{Nl}|\\$|_|\\\\u[0-9A-Fa-f]{4}|\\p{Mn}|\\p{Mc}|\\p{Nd}|\\p{Pc}|\\u200C|\\u200D)*$/u\r\n  o Boolean isArray default=false\r\n  o Boolean isOptional default=false\r\n  o Decorator[] decorators optional\r\n  o Range location optional\r\n}\r\n\r\nconcept RelationshipProperty extends Property {\r\n  o TypeIdentifier type\r\n}\r\n\r\nconcept ObjectProperty extends Property {\r\n  o String defaultValue optional\r\n  o TypeIdentifier type\r\n}\r\n\r\nconcept BooleanProperty extends Property {\r\n  o Boolean defaultValue optional\r\n}\r\n\r\nconcept DateTimeProperty extends Property {\r\n}\r\n\r\nconcept StringProperty extends Property {\r\n  o String defaultValue optional\r\n  o StringRegexValidator validator optional\r\n  o StringLengthValidator lengthValidator optional\r\n}\r\n\r\nconcept StringRegexValidator {\r\n  o String pattern\r\n  o String flags\r\n}\r\n\r\nconcept StringLengthValidator {\r\n  o Integer minLength optional\r\n  o Integer maxLength optional\r\n}\r\n\r\nconcept DoubleProperty extends Property {\r\n  o Double defaultValue optional\r\n  o DoubleDomainValidator validator optional\r\n}\r\n\r\nconcept DoubleDomainValidator {\r\n  o Double lower optional\r\n  o Double upper optional\r\n}\r\n\r\nconcept IntegerProperty extends Property {\r\n  o Integer defaultValue optional\r\n  o IntegerDomainValidator validator optional\r\n}\r\n\r\nconcept IntegerDomainValidator {\r\n  o Integer lower optional\r\n  o Integer upper optional\r\n}\r\n\r\nconcept LongProperty extends Property {\r\n  o Long defaultValue optional\r\n  o LongDomainValidator validator optional\r\n}\r\n\r\nconcept LongDomainValidator {\r\n  o Long lower optional\r\n  o Long upper optional\r\n}\r\n\r\nconcept AliasedType{\r\n  o String name\r\n  o String aliasedName\r\n}\r\nabstract concept Import {\r\n  o String namespace\r\n  o String uri optional\r\n}\r\n\r\nconcept ImportAll extends Import {\r\n}\r\n\r\nconcept ImportType extends Import {\r\n  o String name\r\n}\r\n\r\nconcept ImportTypes extends Import {\r\n  o String[] types\r\n  o AliasedType[] aliasedTypes optional\r\n}\r\n\r\nconcept Model {\r\n  o String namespace\r\n  o String sourceUri optional\r\n  o String concertoVersion optional\r\n  o Import[] imports optional\r\n  o Declaration[] declarations optional\r\n  o Decorator[] decorators optional\r\n}\r\n\r\nconcept Models {\r\n  o Model[] models\r\n}\r\n\r\nabstract concept ScalarDeclaration extends Declaration {\r\n}\r\n\r\nconcept BooleanScalar extends ScalarDeclaration {\r\n  o Boolean defaultValue optional\r\n}\r\n\r\nconcept IntegerScalar extends ScalarDeclaration {\r\n  o Integer defaultValue optional\r\n  o IntegerDomainValidator validator optional\r\n}\r\n\r\nconcept LongScalar extends ScalarDeclaration {\r\n  o Long defaultValue optional\r\n  o LongDomainValidator validator optional\r\n}\r\n\r\nconcept DoubleScalar extends ScalarDeclaration {\r\n  o Double defaultValue optional\r\n  o DoubleDomainValidator validator optional\r\n}\r\n\r\nconcept StringScalar extends ScalarDeclaration {\r\n  o String defaultValue optional\r\n  o StringRegexValidator validator optional\r\n  o StringLengthValidator lengthValidator optional\r\n}\r\n\r\nconcept DateTimeScalar extends ScalarDeclaration {\r\n  o String defaultValue optional\r\n}\r\n";