2 files changed, 5 insertions, 16 deletions

diff --git a/subprojects/language-model/src/main/resources/model/problem.ecore b/subprojects/language-model/src/main/resources/model/problem.ecore
index 2d86382d..204f922c 100644
--- a/subprojects/language-model/src/main/resources/model/problem.ecore
+++ b/subprojects/language-model/src/main/resources/model/problem.ecore
@@ -22,17 +22,18 @@
         containment="true"/>
     <eStructuralFeatures xsi:type="ecore:EAttribute" name="kind" eType="#//ReferenceKind"/>
     <eStructuralFeatures xsi:type="ecore:EReference" name="referenceType" eType="#//Relation"/>
+    <eStructuralFeatures xsi:type="ecore:EReference" name="invalidMultiplicity" eType="#//Relation"
+        containment="true"/>
   </eClassifiers>
   <eClassifiers xsi:type="ecore:EClass" name="NamedElement" abstract="true">
     <eStructuralFeatures xsi:type="ecore:EAttribute" name="name" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EString"/>
   </eClassifiers>
   <eClassifiers xsi:type="ecore:EClass" name="PredicateDefinition" eSuperTypes="#//ParametricDefinition #//Relation">
-    <eStructuralFeatures xsi:type="ecore:EAttribute" name="kind" eType="#//PredicateKind"/>
     <eStructuralFeatures xsi:type="ecore:EReference" name="bodies" upperBound="-1"
         eType="#//Conjunction" containment="true"/>
+    <eStructuralFeatures xsi:type="ecore:EAttribute" name="error" eType="ecore:EDataType http://www.eclipse.org/emf/2002/Ecore#//EBoolean"/>
   </eClassifiers>
   <eClassifiers xsi:type="ecore:EClass" name="Parameter" eSuperTypes="#//Variable">
-    <eStructuralFeatures xsi:type="ecore:EAttribute" name="modality" eType="#//Modality"/>
     <eStructuralFeatures xsi:type="ecore:EReference" name="parameterType" eType="#//Relation"/>
   </eClassifiers>
   <eClassifiers xsi:type="ecore:EClass" name="Variable" abstract="true" eSuperTypes="#//VariableOrNode"/>
@@ -169,12 +170,6 @@
     <eLiterals name="CONTAINMENT" value="2"/>
     <eLiterals name="CONTAINER" value="3"/>
   </eClassifiers>
-  <eClassifiers xsi:type="ecore:EEnum" name="PredicateKind">
-    <eLiterals name="DEFAULT"/>
-    <eLiterals name="ERROR" value="1"/>
-    <eLiterals name="CONTAINED" value="2"/>
-    <eLiterals name="CONTAINMENT" value="3"/>
-  </eClassifiers>
   <eClassifiers xsi:type="ecore:EClass" name="Expr" abstract="true"/>
   <eClassifiers xsi:type="ecore:EClass" name="VariableOrNodeExpr" eSuperTypes="#//Expr">
     <eStructuralFeatures xsi:type="ecore:EReference" name="variableOrNode" eType="#//VariableOrNode"/>
diff --git a/subprojects/language-model/src/main/resources/model/problem.genmodel b/subprojects/language-model/src/main/resources/model/problem.genmodel
index 5767d18d..b5aa81c4 100644
--- a/subprojects/language-model/src/main/resources/model/problem.genmodel
+++ b/subprojects/language-model/src/main/resources/model/problem.genmodel
@@ -40,12 +40,6 @@
       <genEnumLiterals ecoreEnumLiteral="problem.ecore#//ReferenceKind/CONTAINMENT"/>
       <genEnumLiterals ecoreEnumLiteral="problem.ecore#//ReferenceKind/CONTAINER"/>
     </genEnums>
-    <genEnums typeSafeEnumCompatible="false" ecoreEnum="problem.ecore#//PredicateKind">
-      <genEnumLiterals ecoreEnumLiteral="problem.ecore#//PredicateKind/DEFAULT"/>
-      <genEnumLiterals ecoreEnumLiteral="problem.ecore#//PredicateKind/ERROR"/>
-      <genEnumLiterals ecoreEnumLiteral="problem.ecore#//PredicateKind/CONTAINED"/>
-      <genEnumLiterals ecoreEnumLiteral="problem.ecore#//PredicateKind/CONTAINMENT"/>
-    </genEnums>
     <genEnums typeSafeEnumCompatible="false" ecoreEnum="problem.ecore#//UnaryOp">
       <genEnumLiterals ecoreEnumLiteral="problem.ecore#//UnaryOp/PLUS"/>
       <genEnumLiterals ecoreEnumLiteral="problem.ecore#//UnaryOp/MINUS"/>
@@ -85,16 +79,16 @@
       <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//ReferenceDeclaration/multiplicity"/>
       <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//ReferenceDeclaration/kind"/>
       <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//ReferenceDeclaration/referenceType"/>
+      <genFeatures property="None" children="true" createChild="true" ecoreFeature="ecore:EReference problem.ecore#//ReferenceDeclaration/invalidMultiplicity"/>
     </genClasses>
     <genClasses ecoreClass="problem.ecore#//NamedElement">
       <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//NamedElement/name"/>
     </genClasses>
     <genClasses ecoreClass="problem.ecore#//PredicateDefinition">
-      <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//PredicateDefinition/kind"/>
       <genFeatures children="true" createChild="true" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//PredicateDefinition/bodies"/>
+      <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//PredicateDefinition/error"/>
     </genClasses>
     <genClasses ecoreClass="problem.ecore#//Parameter">
-      <genFeatures createChild="false" ecoreFeature="ecore:EAttribute problem.ecore#//Parameter/modality"/>
       <genFeatures notify="false" createChild="false" propertySortChoices="true" ecoreFeature="ecore:EReference problem.ecore#//Parameter/parameterType"/>
     </genClasses>
     <genClasses ecoreClass="problem.ecore#//Variable"/>