From 2c443298d8e20350aac166c6caadb14583e141d6 Mon Sep 17 00:00:00 2001
From: Diego Diaz <46930149+diegoalexdiaz@users.noreply.github.com>
Date: Wed, 30 Oct 2024 08:48:31 -0400
Subject: [PATCH] Capture expected submodel classes via breaks down
 relationships (#342)

* Capture expected submodel class via breaks down relationships.

* Add breaksDown relationship associated to RepositoryLink.

* Add line-separation between entities for readability.

* Add modelBreaksDownElement relationship to GeologicalModel schema.

* Add missing alias.

* Remove duplicate class.

* Address remaining validation issues.

* Address issues left behind by conflict-merge.
---
 Domains/0-Core/BisCore.ecschema.xml           | 123 +++++++++++++++++-
 .../ClassificationSystems.ecschema.xml        |  11 ++
 Domains/1-Common/Grids/Grids.ecschema.xml     |  21 +++
 .../RoadRailAlignment.ecschema.xml            |   9 ++
 .../GeologicalModel.ecschema.xml              |  11 ++
 .../SewerHydraulicAnalysis.ecschema.xml       |  20 ++-
 .../StructuralAnalysis.ecschema.xml           |  11 ++
 7 files changed, 203 insertions(+), 3 deletions(-)

diff --git a/Domains/0-Core/BisCore.ecschema.xml b/Domains/0-Core/BisCore.ecschema.xml
index 10a77849a..e1d03a524 100644
--- a/Domains/0-Core/BisCore.ecschema.xml
+++ b/Domains/0-Core/BisCore.ecschema.xml
@@ -362,6 +362,116 @@
             <Class class="ISubModeledElement" />
         </Target>
     </ECRelationshipClass>
+    <ECRelationshipClass typeName="DefinitionModelBreaksDownDefinitionPartition" displayLabel="DefinitionModel Sub-Models DefinitionPartition" strength="embedding" strengthDirection="backward" modifier="None" description="Relates a bis:DefinitionModel to the bis:DefinitionPartition that it sub-models.">
+        <!-- @see Model.ModeledElement ECNavigationProperty -->
+        <BaseClass>ModelModelsElement</BaseClass>
+        <Source multiplicity="(0..1)" roleLabel="models" polymorphic="false">
+            <Class class="DefinitionModel"/>
+        </Source>
+        <Target multiplicity="(0..1)" roleLabel="is modeled by" polymorphic="false">
+            <Class class="DefinitionPartition" />
+        </Target>
+    </ECRelationshipClass>
+    <ECRelationshipClass typeName="DefinitionModelBreaksDownDefinitionContainer" displayLabel="DefinitionModel Sub-Models DefinitionContainer" strength="embedding" strengthDirection="backward" modifier="None" description="Relates a bis:DefinitionModel to the bis:DefinitionContainer that it sub-models.">
+        <!-- @see Model.ModeledElement ECNavigationProperty -->
+        <BaseClass>ModelModelsElement</BaseClass>
+        <Source multiplicity="(0..1)" roleLabel="models" polymorphic="false">
+            <Class class="DefinitionModel"/>
+        </Source>
+        <Target multiplicity="(0..1)" roleLabel="is modeled by" polymorphic="true">
+            <Class class="DefinitionContainer" />
+        </Target>
+    </ECRelationshipClass>
+    <ECRelationshipClass typeName="DrawingModelBreaksDownTemplateRecipe2d" displayLabel="DrawingModel Sub-Models TemplateRecipe2d" strength="embedding" strengthDirection="backward" modifier="None" description="Relates a bis:DrawingModel to the bis:TemplateRecipe2d that it sub-models.">
+        <!-- @see Model.ModeledElement ECNavigationProperty -->
+        <BaseClass>ModelModelsElement</BaseClass>
+        <Source multiplicity="(0..1)" roleLabel="models" polymorphic="false">
+            <Class class="DrawingModel"/>
+        </Source>
+        <Target multiplicity="(0..1)" roleLabel="is modeled by" polymorphic="true">
+            <Class class="TemplateRecipe2d" />
+        </Target>
+    </ECRelationshipClass>
+    <ECRelationshipClass typeName="PhysicalModelBreaksDownTemplateRecipe3d" displayLabel="PhysicalModel Sub-Models TemplateRecipe2d" strength="embedding" strengthDirection="backward" modifier="None" description="Relates a bis:PhysicalModel to the bis:TemplateRecipe3d that it sub-models.">
+        <!-- @see Model.ModeledElement ECNavigationProperty -->
+        <BaseClass>ModelModelsElement</BaseClass>
+        <Source multiplicity="(0..1)" roleLabel="models" polymorphic="false">
+            <Class class="PhysicalModel"/>
+        </Source>
+        <Target multiplicity="(0..1)" roleLabel="is modeled by" polymorphic="true">
+            <Class class="TemplateRecipe3d" />
+        </Target>
+    </ECRelationshipClass>
+    <ECRelationshipClass typeName="DocumentListModelBreaksDownDocumentPartition" displayLabel="DocumentListModel Sub-Models DocumentPartition" strength="embedding" strengthDirection="backward" modifier="None" description="Relates a bis:DocumentListModel to the bis:DocumentPartition that it sub-models.">
+        <!-- @see Model.ModeledElement ECNavigationProperty -->
+        <BaseClass>ModelModelsElement</BaseClass>
+        <Source multiplicity="(0..1)" roleLabel="models" polymorphic="false">
+            <Class class="DocumentListModel"/>
+        </Source>
+        <Target multiplicity="(0..1)" roleLabel="is modeled by" polymorphic="true">
+            <Class class="DocumentPartition" />
+        </Target>
+    </ECRelationshipClass>
+    <ECRelationshipClass typeName="GroupInformationModelBreaksDownGroupInformationPartition" displayLabel="DocumentListModel Sub-Models GroupInformationPartition" strength="embedding" strengthDirection="backward" modifier="None" description="Relates a bis:GroupInformationModel to the bis:GroupInformationPartition that it sub-models.">
+        <!-- @see Model.ModeledElement ECNavigationProperty -->
+        <BaseClass>ModelModelsElement</BaseClass>
+        <Source multiplicity="(0..1)" roleLabel="models" polymorphic="true">
+            <Class class="GroupInformationModel"/>
+        </Source>
+        <Target multiplicity="(0..1)" roleLabel="is modeled by" polymorphic="true">
+            <Class class="GroupInformationPartition" />
+        </Target>
+    </ECRelationshipClass>
+    <ECRelationshipClass typeName="InformationRecordModelBreaksDownInformationRecordPartition" displayLabel="InformationRecordModel Sub-Models InformationRecordPartition" strength="embedding" strengthDirection="backward" modifier="None" description="Relates a bis:InformationRecordModel to the bis:InformationRecordPartition that it sub-models.">
+        <!-- @see Model.ModeledElement ECNavigationProperty -->
+        <BaseClass>ModelModelsElement</BaseClass>
+        <Source multiplicity="(0..1)" roleLabel="models" polymorphic="true">
+            <Class class="InformationRecordModel"/>
+        </Source>
+        <Target multiplicity="(0..1)" roleLabel="is modeled by" polymorphic="true">
+            <Class class="InformationRecordPartition" />
+        </Target>
+    </ECRelationshipClass>
+    <ECRelationshipClass typeName="LinkModelBreaksDownLinkPartition" displayLabel="LinkModel Sub-Models LinkPartition" strength="embedding" strengthDirection="backward" modifier="None" description="Relates a bis:LinkModel to the bis:LinkPartition that it sub-models.">
+        <!-- @see Model.ModeledElement ECNavigationProperty -->
+        <BaseClass>ModelModelsElement</BaseClass>
+        <Source multiplicity="(0..1)" roleLabel="models" polymorphic="true">
+            <Class class="LinkModel"/>
+        </Source>
+        <Target multiplicity="(0..1)" roleLabel="is modeled by" polymorphic="true">
+            <Class class="LinkPartition" />
+        </Target>
+    </ECRelationshipClass>
+    <ECRelationshipClass typeName="PhysicalModelBreaksDownPhysicalPartition" displayLabel="PhysicalModel Sub-Models PhysicalPartition" strength="embedding" strengthDirection="backward" modifier="None" description="Relates a bis:PhysicalModel to the bis:PhysicalPartition that it sub-models.">
+        <!-- @see Model.ModeledElement ECNavigationProperty -->
+        <BaseClass>ModelModelsElement</BaseClass>
+        <Source multiplicity="(0..1)" roleLabel="models" polymorphic="true">
+            <Class class="PhysicalModel"/>
+        </Source>
+        <Target multiplicity="(0..1)" roleLabel="is modeled by" polymorphic="true">
+            <Class class="PhysicalPartition" />
+        </Target>
+    </ECRelationshipClass>
+    <ECRelationshipClass typeName="GraphicalModel3dBreaksDownGraphicalPartition3d" displayLabel="GraphicalModel3d Sub-Models GraphicalPartition3d" strength="embedding" strengthDirection="backward" modifier="None" description="Relates a bis:GraphicalModel3d to the bis:GraphicalPartition3d that it sub-models.">
+        <!-- @see Model.ModeledElement ECNavigationProperty -->
+        <BaseClass>ModelModelsElement</BaseClass>
+        <Source multiplicity="(0..1)" roleLabel="models" polymorphic="true">
+            <Class class="GraphicalModel3d"/>
+        </Source>
+        <Target multiplicity="(0..1)" roleLabel="is modeled by" polymorphic="true">
+            <Class class="GraphicalPartition3d" />
+        </Target>
+    </ECRelationshipClass>
+    <ECRelationshipClass typeName="SpatialLocationModelBreaksDownSpatialLocationPartition" displayLabel="SpatialLocationModel Sub-Models SpatialLocationPartition" strength="embedding" strengthDirection="backward" modifier="None" description="Relates a bis:SpatialLocationModel to the bis:SpatialLocationPartition that it sub-models.">
+        <!-- @see Model.ModeledElement ECNavigationProperty -->
+        <BaseClass>ModelModelsElement</BaseClass>
+        <Source multiplicity="(0..1)" roleLabel="models" polymorphic="true">
+            <Class class="SpatialLocationModel"/>
+        </Source>
+        <Target multiplicity="(0..1)" roleLabel="is modeled by" polymorphic="true">
+            <Class class="SpatialLocationPartition" />
+        </Target>
+    </ECRelationshipClass>
     <ECRelationshipClass typeName="PhysicalModelBreaksDownPhysicalPortion" strength="embedding" strengthDirection="backward" modifier="None" description="DEPRECATED">
         <ECCustomAttributes>
             <Deprecated xmlns="CoreCustomAttributes.01.00.03">
@@ -376,7 +486,8 @@
             <Class class="PhysicalPortion" />
         </Target>
     </ECRelationshipClass>
-    <ECRelationshipClass typeName="DrawingModelBreaksDownDrawing" displayLabel="DrawingModel Sub-Models Drawing" strength="embedding" strengthDirection="backward" modifier="None">
+    <ECRelationshipClass typeName="DrawingModelBreaksDownDrawing" displayLabel="DrawingModel Sub-Models Drawing" strength="embedding" strengthDirection="backward" modifier="None" description="Relates a bis:DrawingModel to the bis:Drawing that it sub-models.">
+        <!-- @see Model.ModeledElement ECNavigationProperty -->
         <BaseClass>ModelModelsElement</BaseClass>
         <Source multiplicity="(0..1)" roleLabel="sub-models" polymorphic="true">
             <Class class="DrawingModel"/>
@@ -394,6 +505,16 @@
             <Class class="Sheet" />
         </Target>
     </ECRelationshipClass>
+    <ECRelationshipClass typeName="ModelBreaksDownRepositoryLink" displayLabel="Model Sub-Models RepositoryLink" strength="embedding" strengthDirection="backward" modifier="None" description="Relates a bis:Model to the bis:RepositoryLink that it sub-models.">
+        <!-- @see Model.ModeledElement ECNavigationProperty -->
+        <BaseClass>ModelModelsElement</BaseClass>
+        <Source multiplicity="(0..1)" roleLabel="models" polymorphic="true">
+            <Class class="Model"/>
+        </Source>
+        <Target multiplicity="(0..1)" roleLabel="is modeled by" polymorphic="true">
+            <Class class="RepositoryLink" />
+        </Target>
+    </ECRelationshipClass>
 
     <ECEntityClass typeName="Element" modifier="Abstract" description="Most abstract class and smallest individually identifiable building block for modeling Entities in a BIS repository.">
         <!-- NOTE: Only platform can directly subclass from Element. Everyone else should pick the most appropriate superclass. -->
diff --git a/Domains/1-Common/ClassificationSystems/ClassificationSystems.ecschema.xml b/Domains/1-Common/ClassificationSystems/ClassificationSystems.ecschema.xml
index ef4d820d3..a85ffd0e5 100644
--- a/Domains/1-Common/ClassificationSystems/ClassificationSystems.ecschema.xml
+++ b/Domains/1-Common/ClassificationSystems/ClassificationSystems.ecschema.xml
@@ -31,6 +31,17 @@
         <BaseClass>bis:ISubModeledElement</BaseClass>
         <ECProperty propertyName="Description" typeName="string" displayLabel="Description" description="Description for this ClassificationTable"/>
     </ECEntityClass>
+
+    <ECRelationshipClass typeName="DefinitionModelBreaksDownClassificationTable" displayLabel="DefinitionModel Sub-Models ClassificationTable" strength="embedding" strengthDirection="backward" modifier="None" description="Relates a bis:DefinitionModel to the ClassificationTable that it sub-models.">
+        <!-- @see Model.ModeledElement ECNavigationProperty -->
+        <BaseClass>bis:ModelModelsElement</BaseClass>
+        <Source multiplicity="(0..1)" roleLabel="models" polymorphic="false">
+            <Class class="bis:DefinitionModel"/>
+        </Source>
+        <Target multiplicity="(0..1)" roleLabel="is modeled by" polymorphic="true">
+            <Class class="ClassificationTable" />
+        </Target>
+    </ECRelationshipClass>
   
     <ECEntityClass typeName="Classification" displayLabel="Classification" description="An element that represents a single entry in a classification system">
         <BaseClass>bis:DefinitionElement</BaseClass>
diff --git a/Domains/1-Common/Grids/Grids.ecschema.xml b/Domains/1-Common/Grids/Grids.ecschema.xml
index 779474bf1..f13cc1e4a 100644
--- a/Domains/1-Common/Grids/Grids.ecschema.xml
+++ b/Domains/1-Common/Grids/Grids.ecschema.xml
@@ -23,6 +23,17 @@
         <BaseClass>bis:ISubModeledElement</BaseClass>
     </ECEntityClass>
 
+    <ECRelationshipClass typeName="SpatialLocationModelBreaksDownGrid" displayLabel="SpatialLocationModel Sub-Models Grid" strength="embedding" strengthDirection="backward" modifier="None" description="Relates a bis:SpatialLocationModel to the Grid that it sub-models.">
+        <!-- @see Model.ModeledElement ECNavigationProperty -->
+        <BaseClass>bis:ModelModelsElement</BaseClass>
+        <Source multiplicity="(0..1)" roleLabel="models" polymorphic="false">
+            <Class class="bis:SpatialLocationModel"/>
+        </Source>
+        <Target multiplicity="(0..1)" roleLabel="is modeled by" polymorphic="true">
+            <Class class="Grid" />
+        </Target>
+    </ECRelationshipClass>
+
     <ECEntityClass typeName="GridAxis" modifier="Abstract" description="A bis:SpatialLocationElement which owns (typically non-intersecting) GridSurface elements.">
         <BaseClass>bis:SpatialLocationElement</BaseClass>
         <BaseClass>bis:IParentElement</BaseClass>
@@ -130,6 +141,16 @@
         <BaseClass>bis:ISubModeledElement</BaseClass>
     </ECEntityClass>
 
+    <ECRelationshipClass typeName="SpatialLocationModelBreaksDownGridSystem" displayLabel="SpatialLocationModel Sub-Models GridSystem" strength="embedding" strengthDirection="backward" modifier="None" description="Relates a bis:SpatialLocationModel to the GridSystem that it sub-models.">
+        <!-- @see Model.ModeledElement ECNavigationProperty -->
+        <BaseClass>bis:ModelModelsElement</BaseClass>
+        <Source multiplicity="(0..1)" roleLabel="models" polymorphic="false">
+            <Class class="bis:SpatialLocationModel"/>
+        </Source>
+        <Target multiplicity="(0..1)" roleLabel="is modeled by" polymorphic="true">
+            <Class class="GridSystem" />
+        </Target>
+    </ECRelationshipClass>
 
     <ECEntityClass typeName="PlanGridSystem" modifier="Abstract" description="A GridSystem of Grids with 'planes' that are parallel to the local x-y plane.">
         <BaseClass>GridSystem</BaseClass>
diff --git a/Domains/2-DisciplinePhysical/Civil/RoadRailAlignment/RoadRailAlignment.ecschema.xml b/Domains/2-DisciplinePhysical/Civil/RoadRailAlignment/RoadRailAlignment.ecschema.xml
index 959ec4ee4..57c71ebfe 100644
--- a/Domains/2-DisciplinePhysical/Civil/RoadRailAlignment/RoadRailAlignment.ecschema.xml
+++ b/Domains/2-DisciplinePhysical/Civil/RoadRailAlignment/RoadRailAlignment.ecschema.xml
@@ -102,6 +102,15 @@
             <HiddenClass xmlns="CoreCustomAttributes.01.00.00"/>
         </ECCustomAttributes>
     </ECEntityClass>
+    <ECRelationshipClass typeName="SpatialLocationModelBreaksDownDesignAlignments" strength="embedding" strengthDirection="Backward" modifier="Sealed" description="Relates a bis:SpatialLocationModel to the DesignAlignments that it sub-models.">
+        <BaseClass>bis:ModelModelsElement</BaseClass>
+        <Source multiplicity="(0..1)" polymorphic="false" roleLabel="breaks down">
+            <Class class="bis:SpatialLocationModel"/>
+        </Source>
+        <Target multiplicity="(1..1)" polymorphic="false" roleLabel="is broken down by">
+            <Class class="DesignAlignments"/>
+        </Target>
+    </ECRelationshipClass>
     <ECEntityClass typeName="HorizontalAlignments" description="Horizontal/Top perspective on Alignments in an AlignmentModel that will be broken down in more detail in a separate HorizontalAlignmentModel.">
         <BaseClass>bis:SpatialLocationElement</BaseClass>
         <BaseClass>bis:ISubModeledElement</BaseClass>
diff --git a/Domains/3-DisciplineOther/GeologicalModel/GeologicalModel.ecschema.xml b/Domains/3-DisciplineOther/GeologicalModel/GeologicalModel.ecschema.xml
index 96ee054f8..e004843f0 100644
--- a/Domains/3-DisciplineOther/GeologicalModel/GeologicalModel.ecschema.xml
+++ b/Domains/3-DisciplineOther/GeologicalModel/GeologicalModel.ecschema.xml
@@ -22,6 +22,17 @@
         <BaseClass>anlyt:AnalyticalModel</BaseClass>
     </ECEntityClass>
 
+    <ECRelationshipClass typeName="GeologicalModelBreaksDownPartition" displayLabel="GeologicalModel Sub-Models GeologicAnalyticalPartition" strength="embedding" strengthDirection="backward" modifier="None" description="Relates a GeologicalModel to the GeologicAnalyticalPartition that it sub-models.">
+        <!-- @see Model.ModeledElement ECNavigationProperty -->
+        <BaseClass>bis:ModelModelsElement</BaseClass>
+        <Source multiplicity="(0..1)" roleLabel="models" polymorphic="false">
+            <Class class="GeologicalModel"/>
+        </Source>
+        <Target multiplicity="(0..1)" roleLabel="is modeled by" polymorphic="false">
+            <Class class="GeologicAnalyticalPartition" />
+        </Target>
+    </ECRelationshipClass>
+
     <ECEntityClass typeName="GeologicElement3d" modifier="Abstract" description="An AnalyticalElement serving as common base class for all element-classes modeling Geological concepts.">
         <BaseClass>anlyt:AnalyticalElement</BaseClass>
     </ECEntityClass>
diff --git a/Domains/3-DisciplineOther/Hydraulics/SewerHydraulicAnalysis.ecschema.xml b/Domains/3-DisciplineOther/Hydraulics/SewerHydraulicAnalysis.ecschema.xml
index 4d4bbe71e..6cc4ed5c3 100644
--- a/Domains/3-DisciplineOther/Hydraulics/SewerHydraulicAnalysis.ecschema.xml
+++ b/Domains/3-DisciplineOther/Hydraulics/SewerHydraulicAnalysis.ecschema.xml
@@ -47,6 +47,7 @@
     <ECEnumerator value="1" name="Design" displayLabel="Design"/>
     <ECEnumerator value="2" name="DesignInvertsOnly" displayLabel="Design Inverts Only"/>
   </ECEnumeration>
+
   <ECEnumeration typeName="FlowProfileMethod" backingTypeName="int" isStrict="true" description="">
     <ECEnumerator value="0" name="BackwaterAnalysis" displayLabel="Backwater Analysis"/>
     <ECEnumerator value="1" name="CapacityAnalysis" displayLabel="Capacity Analysis"/>
@@ -58,6 +59,7 @@
     <ECEnumerator value="3" name="SimpleAverageVelocity" displayLabel="Simple Average Velocity"/>
     <ECEnumerator value="4" name="WeightedAverageVelocity" displayLabel="Weighted Average Velocity"/>
   </ECEnumeration>
+
   <ECEnumeration typeName="StructureLossMethod" backingTypeName="int" isStrict="true" description="">
     <ECEnumerator value="0" name="HydraulicGrade" displayLabel="Hydraulic Grade"/>
     <ECEnumerator value="1" name="EnergyGrade" displayLabel="Energy Grade"/>
@@ -68,7 +70,7 @@
     <ECEnumerator value="1" name="PipeTop" displayLabel="Pipe Top"/>
   </ECEnumeration>
 
-	  <ECEnumeration typeName="PipeMatching" backingTypeName="int" isStrict="true" >
+	<ECEnumeration typeName="PipeMatching" backingTypeName="int" isStrict="true" >
     <ECEnumerator value="0" name="Inverts" displayLabel="Inverts"/>
     <ECEnumerator value="1" name="Crowns" displayLabel="Crowns"/>
   </ECEnumeration>
@@ -117,6 +119,17 @@
 		<BaseClass>anlyt:AnalyticalPartition</BaseClass>
 	</ECEntityClass>
 
+  <ECRelationshipClass typeName="SewerHydraulicAnalysisModelBreaksDownPartition" displayLabel="SewerHydraulicAnalysisModel Sub-Models SewerHydraulicAnalysisPartition" strength="embedding" strengthDirection="backward" modifier="None" description="Relates a SewerHydraulicAnalysisModel to the SewerHydraulicAnalysisPartition that it sub-models.">
+    <!-- @see Model.ModeledElement ECNavigationProperty -->
+    <BaseClass>bis:ModelModelsElement</BaseClass>
+    <Source multiplicity="(0..1)" roleLabel="models" polymorphic="false">
+        <Class class="SewerHydraulicAnalysisModel"/>
+    </Source>
+    <Target multiplicity="(0..1)" roleLabel="is modeled by" polymorphic="false">
+        <Class class="SewerHydraulicAnalysisPartition" />
+    </Target>
+  </ECRelationshipClass>
+
 	<ECEntityClass typeName="PipeDesignConstraintsAspect" modifier="Sealed" displayLabel="Pipe Design Constraints">
     <BaseClass >bis:ElementUniqueAspect</BaseClass>
     <ECProperty propertyName="MinVelocity" typeName="double" displayLabel="Velocity (Minimum)" category="DesignData" kindOfQuantity="rru:VELOCITY" description="The minimum velocity constraint used during constraint based design."/>
@@ -153,6 +166,7 @@
  <ECEntityClass typeName="GlobalDesignConstraints" modifier="Sealed" displayLabel="Global Design Constraints">
     <BaseClass >bis:DefinitionElement</BaseClass>
   </ECEntityClass>
+
   <ECRelationshipClass typeName="GlobalDesignConstraintsOwnsPipeDesignConstraintsAspect" strength="embedding" modifier="Sealed">
     <BaseClass >bis:ElementOwnsUniqueAspect</BaseClass>
     <Source multiplicity="(1..1)" roleLabel="owns" polymorphic="false">
@@ -162,6 +176,7 @@
       <Class class="PipeDesignConstraintsAspect"/>
     </Target>
   </ECRelationshipClass>
+
   <ECRelationshipClass typeName="GlobalDesignConstraintsOwnsNodeDesignConstraintsAspect" strength="embedding" modifier="Sealed">
     <BaseClass >bis:ElementOwnsUniqueAspect</BaseClass>
     <Source multiplicity="(1..1)" roleLabel="owns" polymorphic="false">
@@ -171,6 +186,7 @@
       <Class class="NodeDesignConstraintsAspect"/>
     </Target>
   </ECRelationshipClass>
+
   <ECRelationshipClass typeName="GlobalDesignConstraintsOwnsInletDesignConstraintsAspect" strength="embedding" modifier="Sealed">
     <BaseClass >bis:ElementOwnsUniqueAspect</BaseClass>
     <Source multiplicity="(1..1)" roleLabel="owns" polymorphic="false">
@@ -390,7 +406,7 @@
 		</Target>
 	</ECRelationshipClass>
 
-	  <ECRelationshipClass typeName="GravityStructureOwnsNodeDesignConstraintsAspect" strength="embedding" modifier="Sealed">
+	<ECRelationshipClass typeName="GravityStructureOwnsNodeDesignConstraintsAspect" strength="embedding" modifier="Sealed">
     <BaseClass >bis:ElementOwnsUniqueAspect</BaseClass>
     <Source multiplicity="(1..1)" roleLabel="owns" polymorphic="true">
       <Class class="GravityStructure"/>
diff --git a/Domains/3-DisciplineOther/StructuralAnalysis/StructuralAnalysis.ecschema.xml b/Domains/3-DisciplineOther/StructuralAnalysis/StructuralAnalysis.ecschema.xml
index c01dfa6d1..2f3179e00 100644
--- a/Domains/3-DisciplineOther/StructuralAnalysis/StructuralAnalysis.ecschema.xml
+++ b/Domains/3-DisciplineOther/StructuralAnalysis/StructuralAnalysis.ecschema.xml
@@ -78,6 +78,17 @@
         <ECNavigationProperty propertyName="DefaultDefinitionContainer" relationshipName="StructuralAnalysisPartitionRefersToDefinitionContainer" direction="Forward" displayLabel="Default Definition Container" description="Default location for definition elements." />
     </ECEntityClass>
 
+    <ECRelationshipClass typeName="StructuralAnalysisModelBreaksDownPartition" displayLabel="StructuralAnalysisModel Sub-Models StructuralAnalysisPartition" strength="embedding" strengthDirection="backward" modifier="None" description="Relates a StructuralAnalysisModel to the StructuralAnalysisPartition that it sub-models.">
+        <!-- @see Model.ModeledElement ECNavigationProperty -->
+        <BaseClass>bis:ModelModelsElement</BaseClass>
+        <Source multiplicity="(0..1)" roleLabel="models" polymorphic="false">
+            <Class class="StructuralAnalysisModel"/>
+        </Source>
+        <Target multiplicity="(0..1)" roleLabel="is modeled by" polymorphic="false">
+            <Class class="StructuralAnalysisPartition" />
+        </Target>
+    </ECRelationshipClass>
+
     <ECRelationshipClass typeName="StructuralAnalysisPartitionRefersToDefinitionContainer" strength="referencing" modifier="Sealed" >
         <Source multiplicity="(0..*)" roleLabel="refers to" polymorphic="false">
             <Class class="StructuralAnalysisPartition"/>